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Патент USA US2405998

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Aug. 2go, 1946.
LIQUEFIED
» w. c.PETROLEÜM
BLVr'rNrERv
GASETAL,
EQUIPMENT
, Filed June 7, 1941 -
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5 Sheets-Sheet 2
Aug» 20» l9.46-
--w. c. BUTTNER ET'AL
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l 2,4%,998
LIQUEFIED PETROLEUM GAS EQUIPMENT
Filed June -7, 1941
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25465599
LIQUEFIED PETROLEUM GAS EQUIPMENT
Fiied June '7, 1941
5 sheets-shew;~ 5
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,lszvenìomsz
WILL/.4M C. BUTT/viz
Patented Aug. 20, 1946
2,405,998
UNITED STATES I PATENT ,OFFICE "
2,4(15g998
LIQUEFIED PETROLEUM GAS EQUIPMENT ’
William C. Buttner, Winnetka, and Savin L.
Y Sundstrom, Chicago, Ill., assignors to The
` Bastian BlessingCo., „i Chicago,
Ill., a corpora
tion of Illinoisl
Application June 7, 1941, Serial No. 397,096
42 Claims. (Cl. 62-1)
l
The present invention relates to liquefied petro- `
lies upon storage tank pressure as a criterion in
leum gas equipment and more particularly to
determining when the liquid level is reached, does
apparatus for handling liqueñed petroleum gas.
The petroleum product employed in the system
with which the present invention is concerned,
not take in account the presence of air or a gas
foreign to liqueñed petroleum gas in the tank. _
Such presence ultimately establishes a gauge
is preferably a hydrocarbon of the paraffin series
pressure above the vapor pressure of the liquefied
gas. The gauge pressureregistered for any given
storage tank is the vapor pressure plus the abso
such as butane or propane or a mixture of both,
preferably stored in an underground tank in the
form of a liqueñed gas which, with the assistance
of the heat of the earth and reduction in pres
lute pressure of the foreign gas present. ' i
' j
The most accurate 'method of `measuring a
sure, is vaporized for`use in a dwelling as a sub
quantity of liquid in the storage tank is by weight. ~
stitute for natural gas.
In view of the fact though, that it is impossible to
actually weigh a' tank when it is buried, one of
the objects of the present invention is to provide
a liqueñed petroleum gas system for the storage
'
4
One Way of vaporizing the liqueiied gas is the
so-called “batch” system in which- vaporization is
carried on in the storage tank and vapor is with
drawn in the form of gas from the tank. The
and dispensing of thegas in which the storage
other way of vaporizing the liquefied gas is the
means is protected against overñlling in an im
so-called “flash” system in which the liquefied
proved manner, a means being provided that is
gasis withdrawn as a liquid from the tank and
related to a constant factor which can be relied
passed through a pressure reducing regulator 20 upon `in determining. the ’volume vof liquid present
which causes the liquid to flash into vapor.
in relationship to its absolute weight.
' .
The storage tank is generally buried below the
The present inventi'on’positively prevents over
frost line, and the temperatures experienced there
filling of the tank whether the operator is present
and watching the operation or temporarily ab.'
por pressure is constant at any given tempera 25 -sent at the time the maximum llevel is reached in
ture and although it is relied upon in most in
the storage tank and the present invention, 'furstallations to force liquefied gas or vapor from
thermore,V eliminates the need for making com
maintain a vapor pressure in the tank.
This va
the storage tank, it cannot be relied upon lor
putations involving temperature when the’tank is
utilized for the purpose of preventing the over
filling of the tank when liquid or vapor is sup 30
Another object of the invention is to provide
.plied to the tank under a higher pressure as by
‘an improved system for the filling of storage
a pump.> Condensation of the vapor will take
tanks whether they be ñlled by gravity or by a
filled.
place progressively and the level of liquid in the
tank will continue to rise as long as a liquid pres
sure is imposed upon the tank greater than the
vapor pressure of the liqueñed gas in the tank.
' An overfilled tank is very dangerous for well
known reasons, and devices have heretofore been
used to warn when the maximum level prescribed
by the National Board of Fire Underwriters is
reached during filling operations. These, how
ever, rely principally upon the personal care and
observation of the service man.
Such devices are
represented in type by the conventional maxi
mum level dip tubes which are vented to atmos
phere to provide a warning fog. However, this
means as well as the venting of vapor to the re
turn tank does not make allowance for expansion
and contraction of the liquid itself under tern
perature changes.
'
'
»
forced kfeed pump,.
`
'
Furthermore, the present invention provides an
improved multiple function ñtting or head which
can be attached as a single unit to a tank whether
the tank isl provided with a riser pipe or not.
LConventional fittings heretofore used have been
formed of cast metal, whereas the `present Àcon
struction is so designed as to be constructed not
Vonly as a casting but as a forged body. This
eliminates the wastepresent with cast bodies re
jected because of porosity and provides a lighter
unit.
.
»
~
, A further object of the invention is to proL
vide an improved head so constructed andar
ranged that a single dip tube is utilized to pro
vide for liquid eduction when the system is used
50 as a flash system and also serves to agitate or
Those devices which do not rely upon the ob
servation of the operator, depend upon conditions
stir the contents of the tank when vthe tankis
ñlled and withdraw the liquid contents if upon
such as pressure which is a variable factor in
occasion it becomes desirable to empty the tank».
A further object of the invention is to provide
fluenced by many conditions other than vapor
For instance, a iilling means which re--
an improved flashdispensing system wherein the
2,405,998
3
4
first stage of pressure reduction is provided with
which has an excess length thereof bent back
an improved pressure regulator.
and forth along the top of the tank as at 36 to
These being among the objects of the inven
absorb heat therefrom. The tube 36 leads to a
tion, other and further objects will become ap
iirst stage pressure reduction regulator 37 which
parent from the drawings, the description relat
has an elongated back cap 38 disposed inside the
ing thereto and the appended claims.
tank and is supported upon `a iiange plate 4l
Referring now to the drawings:
welded to the tank over an opening 42 therein.
Fig. 1 is a vertical sectional view taken longi
Beyond the first stage regulator 3T a service pipe
tudinally through a tank illustrating the struc
43 leads to a second stage regulator 44 which
ture and >arrangements of the preferred embodi 10 may be located near the iiist stage regulator if
ment of the invention when the storage tank is
desired but preferably is disposed inside the
being filled and the system is in operation. `
Fig. 2 is a perspective View of the body forg
ing of the ñtting illustrated in Fig. l before
machining.
dwelling where the gas is to be used.
The tank is provided with an initial supply of
liquefied gas and replenished from time to time
15 through a hose connection 45 and valve 49 lead
Fig. 3 is a top view of the fitting as taken upon
the line 3-3 in Fig. 1.
.
Fig. 4 is a section taken upon the line 4-4 in
Fig. 3.
'
ing froma service truck 46, being supplied with
liquefied gas under pressure by means of a revers
ible pump 41 whose intake 48 is connected to
the bottom of the tank 46 and whose output is
Fig. 5 is a section taken upon the line 5-5 20 carried to the hose 45 by means of a conduit 5I
in Fig. 3.
.
which includes a meter 52 that is connected to
Fig. 6 is a view similar to Fig. 3 illustrating
the truck tank ‘46 by a by-pass including an
another embodiment of the invention.
elbow 53 and a pressure relief valve 54.
Fig. 7 is a section taken upon the line 1-1 in
Although provision has been shown for venting
Fig. 6.
the storage tank 20 back to the supply tank 46
Fig. 8 is a side elevation showing the iill pipe
during filling operations, equalization of pres
and gauge control which can be used alternatively
sures between the two tanks is had through the
with the fittings shown in Fig. 3 and Fig. 6.
hose «45 when connected. In fact, during the
Fig. 9 is a lateral view of the device illustrated
summer months the tank y46 because of the sun
in Fig. 8 taken at a 90° angle.
30 shining on it, will have a vapor pressure which
Fig, 10 is an enlarged view-of the float con
is greater than the vapor pressure in the buried
struction shown in Fig. l, and
tank 20. This pressure assists the pump 41 in
Fig, 11 is an enlarged vertical section throug
driving liqueñeld gas into the tank 20. Then,
the first stage pressure regulator shown in
whenever flow through the pipe 45 is obstructed
Fig. 1.
35 the meter .52 im‘ll stop registering and the by-pass
Referring now to the drawings-in further de
relief valve 54 will come into operation.
tail and particularly to Fig. 1, a pressure tested,
The hose `45 supplies liquefied gas to the tank
corrosion treated tank 20 is buried in the ground
28 through the pipe 33 which is supported upon
2| .below the frost line-22 thereof to absorb heat
the fitting 32 in communication with the hose
from the earth to warm the liquid (not shown)
45.
which is stored in thetank, such as a liquefied
butane or propane or a mixture of both.
With this arrangement the heat of the earth
is relied upon to establish a vapor pressure in
the tank which may be utilized to force fuel
either in. its liquefied state or its vapor phase,
out of the tank.
‘ The tank is provided with a riser pipe 23
which is welded at the lower end thereof to the
tank 20 as at 24 where it is disposed over an ,.
opening 25 in the top of the tank. At its top,
Unit assembly
Referring now to Fig. 2 the body forging for
the fitting 32 is illustrated as it appears before
machining. The forging 55 is made with two
dies whose line of separation follows the outline
contour of the forging as seen in plan View. The
lower die (not shown) provides a cylindrical shell
56 at the base having a cavity 64 therein and
the upper die in cooperation with the lower ’die
provides upwardly extending bosses 51, 58 and
59 and laterally extending bosses `6i), 6l and 62,
the-pipe 23 receives thereon a concrete curb box
26 having a cover 1 hinged thereto which when
the space between the inclined bosses being pro
closed, may be locked (padlock not shown) and
vided with a bulk of metal 63.
fastened to the hasp 28.
The open space 64 in the shell 56 is separated
from the metal 63 by a wall 65 which in the
i
The length of the pipe 23 is determined in
relationshipto the depth at which it is expected
to «bury the tank 20 so that the upper end of
the pipe is disposed well down in the box 26 after
the installation is made. The upper end of the
pipe 23 is threaded as at 3| to receive a cap (not
shown) which prevents foreign matter entering
.thetank during shipment and installation after
which the cap is removed and a fitting or head
32 is threaded thereon.
The head ¿32 comprises a body carrying a pipe
or dip tube 33 which extends to a point adjacent
the bottom of the tank as shown in the particular
embodiment illustrated in Fig. l where, through
an opening 34, liquid from the body thereof with
in the `tank may be withdrawn into the pipe .33
particular embodiment shown, is of suiîicient
thickness to permit the dies to function to their
best advantage.
All contours of the forging taper from the line
of separation, the shell 56 tapering downwardly
and being provided with sufficient stock to re
ceive threads 65 therein, Fig. 4, and the wall 65
being provided with sufficient stock and thick
nesses where required, to receive the several units
assembled therewith which will now be described.
In the particular embodiment illustrated with
reference to Fig. 4, the boss 51 is provided as a
liquid outlet and inlet connection having a double
valve construction. The boss is drilled out to a
depth indicated at 61 where it is in communica
detail hereafter. The liquid then iiows through
pipe 33, through fitting or head 32 and passes
tion with an upwardly drilled and threaded open
ing -68 in a portion ‘H of the wall 65.> In this
Wall is formed a cylindrical well which serves as
outwardly and downwardly through tubing 35
a guide 13. The guide is located .beyond'the end
in. a manner which will be described in further
2,405,998
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of the plug |28 (Fig. 3) and receives'the stem 14
wardly of the place where a retainer |28. rests
of a valve member 15 which is spring pressed
against a -shoulder I3|.
'
At its outer end the shaft |34 is cross section
ally contoured as at |35 in an irregular manner
is threaded as at 11 to a depth providing an
annular shoulder 18 beyond which the walls are CFI to receive a tool (not shown) thereon in’only one
relationship so that the relative position of the
undercut as at 8| to provide a valve chamber 80
-pet cock valve |28 can be determined. A seal
for the valve 15 with sufficient clearance between
ing cap |38 is provided as required. The pet
the valve 15 and the walls 8| to permit free flow
`cockvalve |28 is provided with an L-shaped pas
of liquid past the edges of the valve 15. The
valve 15 is held in place by a retainer 82 screwed 10 sage |38 therein and in one position the passage
Y|38 as shown in Fig. 4 connects the vapor educ
in place against the shoulder 18. The retainer
ti'on portion of passage |00 with the service pas
82 provides a valve seat 83 for the valve 15. The
sage |0| for batch vaporization as shown, where
valve'1-5 is drilled out as at 84 to receive for
as when the pet cock valve is turned 90° counter
mounting thereon the stem 85 of a second valve
81 having a cavity therein 88 on its upper face. 15 clockwise from its position shown in Fig. 4, the
passage |38 connects the service passage |0|A
A spring 80 is positioned in the bore 84 and
4with the liquid eduction compartment 80 for pur
bears at one end upon the valve 15 and at the
pose of iiash vaporization. It willi be further
other end upon the bottom of the valve 81, tend
seen also that the'` openingv of one of the pas
ing to force it outwardly. The seating portion
sages by the movement of the pet cock will close
of compressible material 9| is removably mounted
the other.
in the cavity 86 on the upper face of the valve
In this way whenever the system is being op
01, being held in place by a washer and screw
erated with batch or flash vaporization, filling
assembly 92. A connection and seating member
operations in which liquefied gas is forced into
93 is removably engaged in the threaded portion
the tank. through the compartment 80 and pipe
11 of the boss and is‘provided upon its lower end
33, do not in any way affect the service charac
with a land or valve seat 94 against which the
teristics of the system. Furthermore, Whenever
valve member 81 closes.
y
it is desirable to empty t‘ne tank, as more partic
Adjacent its upper end the member 93> is in
ularly described in the Norway Patent No. 2,361,
ternally threaded as at 95 to receive a closure
plug l98. The member 93 is also externally 30 865; there is no opportunity for vapor to reach
thev compartment 85 through the vapor with
threaded by heavy threads y‘91 to receive a iilling
drawal passage |38 to break the suction, if set
hose or adapter connection 98 carried upon the
for batch vaporization. In the event the system
end of the hose 45.
is operating on ñash vaporization aswhen the
The lateral boss 6| is provided with a passage
outwardly by av compression spring 18.' The boss
|0| drilled to a predetermined depth into the
body portion of the forging -where it is connected
petcock is set for liquid eduction, the filling op
eration in no way affects the service conditions
even if air is present in the hose line. Any air
to the chamber 80 by a passage |00 drilled down
that might happen to be in the hose 45 at the
wardly through the forging for purpose of with
time the connection was made, will be forced
drawing gas from the tank in its vapor form
through its lower end, or in liquid form through 40 past the passage |00 and into the tank without
entering the service line |0|. Any air that might
its upper end as desired under the control of a
enter the passage |38V due to gas being used at
petcock |26. At |03 the passage |0| is enlarged
the appliance will tend to bubble back into the
to provide the shoulder |04 which forms an abut
incoming liquid since the inlet of passage |38
ment for an excess iiow check valve |05 held in
opens upwardly.
place by a check seat |08 drilled and cut to a
From the description thus far, it will be seen
hexagonal form as at |01 to receive a service
that a new and improved liquefied gas. dispens
wrench.
`
`
ing method and> apparatus is provided for batch
Outwardly of the check seat |05, the boss '6| is
orflash vaporization with only one dip tube be
provided with a threaded downwardly opening
outlet |08 which receives a conventional P. O. L. 50 ing required for the purposes mentioned.
coupling ||| to which is fastened the tubing 35.
A Boss 59 (Fig. 5) is drilled out to receive a safe
The needle valve ||2 is mounted in a carrier H3
to cooperate with a shutoiî seat ||-4 in the check
seat |08 to prevent the flow of fluid through the
passage |0|. The needle valve ||2 has its stem
threaded into the carrier ||3 and the shaft H6
ty pressure relief valve |4I, many characteristics
thereof surrounded by a packing ||1 held in
place by a packing gland H8. » The stem is
squared at its outer end as at |2| to receive a
tool for rotation, whereby the needle valve may 60
be opened or closed at will.
'
y
On its outer end the carrier ||3 is threaded
to receive a wing cap |22 provided with an-an
of which are more fully described in the Buttner
et al. Patent No. 2,254,209.`
A cutter (not shown) provides a cylindrical
cavity |42 inthe boss 59. at the bottom of which
isprovideda raised valve seat |43 and at its
outeä end the wall |44 is internally threaded as
at l 5.
.
Mounted within the cavity |42 is a spring
guide |48 having a hexagonal outer contour, the
corners of which serve to guide the spring guide
with respect to the wall |44. At its lower end
the spring guide is threaded to receive a disc re
nular cavity |23 cross sectionally shaped to mate
65 tainer |41 which holds a composition disc |48
with the squared nut |2| whereby the cap may
in its proper position to cooperate with the seat
be utilized as the tool required to operate the
|43. A compression spring |5| disposed in a de
needle valve when the cap is removedand turned
pression |52 in the spring guide is held in place
end for end.
'
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by an adjustable spider |53 threadedly received
A bore |24, tapered at its inner end, extends 70 in the cavity by threads |45, where after adjust
through boss 80 and communicates with the in
ment, it is held in place by a drop of solder |54.
tersecting passages |80 and |0|_ In this bore is
. vThe safety valve |4| is continuously in open
received the tapered pet-cock valve |28 already.
communication with the interior 0f the tank
mentioned and shaft |34 which valve is held' in
through a drilled passage |56 which forms the
place by a compression spring |21 disposedin 75 innerl boundary >and the port area of the valve
2,405,998
7
seat. |43. A weep-hole |51 is provided to pre
vent the collection of moisture around the valve
seat.
.
.
Lest the capacity of the safety relief valve |4|
is insufficient for any particular installation, the
boss 62 is provided with enough body stock that
a threaded opening can be provided there
through to receive a safety relief valve such as
that shown in the Buttner et al. Patent No.
2,254,209, when, upon occasion, such is required.
A vent connection |6| is preferably provided
to remove any accumulation of air which might
be present at the top of the riser pipe. This vent
connection is received in the boss 58 where it is
drilled out as at |62 to receive a slug check |68
that is held normally open by a spring |63 i. e.
away from a retainer |35 whose lower face com
8
pipe 33 by any suitable means such as a lock screw
(not shown). The float |93 is counterbalanced
.by a weight |96, and, at a predetermined point |99
spaced from the pivotpin |94, a thrust shaft> |91
is pivotally fastened to be operated by the float
arm |98 to move a lead nut element 20| (Fig, y8)
up and down along a bracket 292, a part of said
element being guided in a slot 293 (Fig. 9). The
lead nut engages a helical cut 284 on the lower
end of the gauge shaft |83.
`
The-lead nut is mounted for rectilineal move
ment with respect to the bracket 202 and the dis
crepancy of alignment existing between the ar
cuately moving float arm and the rectilineal
movement of the lead nut 20|, is accommodated
by a pivotal connection 205 between the thrust
arm |91 and the lead nut 28 |. In this way move
prises a valve seat. The spring extends through
ment of the float |93 translated to the pivotal
a guide opening |64 in the slug check retainer
point |94, moves the lead nut 20| along the bot
|65, the outer end of the spring abutting against 20 tom end of the shaft |83 to rotate it.
a spider |86 which serves also as a, guide for the
Depending upon diiîerent types of installations
and different lengths of pipe 33 the brackets 202
in a body |1| which body has a machined valve
are secured in pla-ce by sleeves or clamps 206
seat |12 thereon cooperating with a' disc |13 up
fastened in place at any convenient height upon
on the valve |68. The safety check valve |68 is 25 the pipe 33. The construction illustrated and de
kept normally closed by a compression spring
scribed herein provides a compactness for this
|14 and is positively opened by a pin |15 support
purpose, whose overall sectional diameter is small
enough to permit same to be lowered through the
ed on thevalve, whenever the body cap |16 is
riser pipe 23 quite easily.
removed and an attachment is connected to the
body |1| that has a projection thereon engaging 30
At the lower end of the dip pipe 33, a ñtting
the pin |15. This attachment may be a valved
201 is threaded thereto which has the opening
outlet bleeding into the atmosphere or may be
34 therein, the ñtting being provided with a valve
seat 208 engaged by a :dapper valve 2|| pivotally
a hose connection returning toa tank, suchv as
the tank 46 shown in Fig. 1, if it is desirable to
mounted within the fitting as at 2| 2 upon a shaft
prevent any escape of gas to the atmosphere as a
which extends laterally beyond the iitting to re
stem |61 of the safety check |58 mounted with
fire precaution under exceptional conditions.
A passageway |11 places the valve |68 in di
ceive a crank arm 2 i3 carrying a thrust shaft 2 I4
Gauge
vides a positive means for preventing the ñow of
liquid into the tank when a predetermined level is
thereon. The arm 2|3 is weighted to hold the
rect and continuously open communication with
valve 2|| normally away from the seat 208 but
the top of the riser pipe 23, and a weep-hole |18
when the thrust shaft 2 I4 is actuated, the ñapper
is provided in the slug check |62 to equalize pres 40 valve 2| | is moved away from its resting position.
sures on opposite sides thereof to open it again
When so moved, and with liquid being forced into
the tank, the stream of liquid will cause the flap
when normal conditions are resumed after it has
been brought into operation.
per valve to close thereby obstructing further
ilow of liquid through the opening 34. This pro
The stock 63 is machined to proper dimension
to receive a liquid level gauge | 8| preferably with
an opening or hole |82 as large as possible cut
through the wall 65 to accommodate the shaft |83
of the gauge and to provide room for visual in
vestigation of the interior of the tank, if upon oc
casion,- such may bel desired and the ñtting 32 is
threaded with a luting compound such as litharge
to the riser pipe 23 against ready removal. This
machining serves also to remove as much metal
stock as possible for salvage from the forging, the
salvage being an item of economy and savings.
However, the wall 65 may be merely drilled to pro
vide a journal for the shaft |83 at the top thereof
reached.
The operation of the valve »2|| is controlled by
the iioat |93 through means of a swivel eye 2|5
slidable on shaft 2 I4 engaging an adjustable stop
upon the thrust shaft 2|4. The stop 2lb` is ca
pable of being so set that the swivel eye 2|5 en
gages it slightly prior to the time that the liquid
in the tank carries the ñoat | 83 to the maximum
safe filling limit. The leverages of the crank arm
2|3 and the point at which the swivel eye 2|5 is
located upon the float arm |98 are so selected that
slight movement of the float at the fill limit will
move the fiapper valve 2|| enough to cause the
in which case very slight leakage would be ex 60 incoming liquid to close it and thereby positively
prevent overiilling of the tank.
perienced if it became desirable to open up the
In order to have the fioat |93 fully responsive
gauge to replace either the dial or the hand there
to the liquid level through the expected range in
in if the gauge is not a sealed magnetic gauge.
the tank, the ñoat arm |98 is made long enough
Around’the upper part of the machined opening
to engage the bottom of the tank well to one side
| 82, a recess |80 is provided to receive a gasket
of the pipe 33, the float |93 in its fully lowered
|84 which isV disposed below the flange |85 upon
position being indicated in phantom at 2 I1. With
the gauge housing |83. The gasket |84 is com
this construction and arrangement the pipe 33,
pressed to provide a seal by means of four bolts
float |93, gauge |8|, and iìtting 201 can be low
|81 (Fig. 3) threaded into the metal 63. The dial
ered as a unit through the riser pipe and the float
|9| and hand |92 for the gauge are shown in
is urged slightly from vertical to start it on its
lateral movement in the tank.
The gauge shaft |83 is operated by a ñoat |93
However, it will be noted that the head 32 is
(Fig. 1) which is pivoted as at |94 to a collar |95
screwed into place upon the riser pipe 23 and this
which forms either a coupling between two sec
requires rotation ofthe pipe 33. In order to have
tions of pipe 33 or a sleeve heldin place on the
Fig. 3.
.
.
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2,405,9984
9.,
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the' ñoat arm |98 long enough to have the ñoat
adapted for aboveground installations -where'the
|93 function as described the length thereof is .
tank used is small enough to be shipped back and
forth between the fuel dealer and his customers
in the ordinary course of business, if necessary,
the ñll opening is machined to receive a safety
check valve 234 spring pressed outwardly by a
spring 235 which forces the valve 234 to close
greater than the radius of the tank and therefore
the arm would be bent if it otherwise were rigid
throughout its length when the fitting 32 was
screwed into place.
,
Referring to Fig. 10, a buckle joint is provided
in the arm |98 which permits the turning of the
pipe 33 at the time of installation or removal
Without injury to the float. This joint is made
by fashioning the arm |98 in two sections |980.
and |98b with their adjacent ends ilattened in
a manner capable of being super-imposed one
upon the other and pivotally mounted by a rivet
2|8 so that the float can move from the position
indicated at 22| to the position indicated in phan
tom at 222. The rivet 2 I 8 is disposed in a Vertical
plane so that when the float portions 223 are
super-imposed one upon the other, the shaft |98
against a seat 236 on the bottom of a retainer
231.
In this embodiment the retainer 231 is pref
erably separated from the filler body 238 which
of itself, carries a spider 24| that serves as a
guide for the stem 242 of a valve 243. The valve
243 is spring pressed outwardly by a, spring 244
to engage a seat 245 machined in the filler body
288. In this construction> the check valves open
simultaneously only upon the application of a
pressure outside of the tank.
A modification of the safety valve |4| is shown
in this construction wherein the Valve seat |43a
transmits a vertical force as though it were a 20 comprises an insert. As a general rule, the forg
ings illustrated herein are made of bronze or
rigid construction. A light tension-spring 223 is
brass. In this embodiment the valve seat |43`a
is made of aluminum or similar metal or material
which oxidizes very rapidly to form a thin layer
ever the float |93 is free for that purpose, the 25 of aluminum oxide which has glass-like charac
teristics very favorable to the prevention of co
other-end of the spring 223 being pinned to the
hesion between the seat and disc |48, this being
shaft portion |98a by a hook 225 disposed longi
one of the features of the present invention. The
tudinally in the shaft |9811. at a distance suflicient
insert |43a. is threaded into the forged body as
to impose upon the spring 223, the force which
is necessary for it to accomplish its purpose.
30 at 246 with the opening 241 therethrough pro
vided with a geometrical contour suitable to re
Thus, whenever the head or ñtting is rotated,
ceive a. wrench that can be used to tighten or
the ñoat arm |98 buckles each time required by
loosen the seat |43a. for installation or repair.
the closeness of the side walls of the tank and
A further Vsafety relief valve in the form of a'
ultimately straightens to place the float in its
expected path of operation.
'
35 fuse plug 248 is illustrated in this embodiment
in the form which can be used with the first de
ri‘he arm |981) is preferably made of a bi-metal
‘ scribed embodiment if desired.
strip which fiexes in a Vertical plane with tem
In mounting the fitting 23| upon ariser pipe
perature changes. This is provided to compen
23a, a pipe which can be much smaller than the
sate for thermal expansion and contraction of
the body of liquefied gas present in the tank so 40 riser pipe 23, a screw ñange 25| is threaded on
to the riser pipe 23a and is grooved at 252 to re
that,'due to the cooperation of the float deter
-ceive a gasket 253'compressed between the ma
mining the volume and the b-i-metal strip deter
chined face 254 upon the bottom of the fitting
mining the temperature, there is an automatic
23| and the screw flange 25| which are held in
adjustment for temperature changes in deter
eyeleted to engage the free end 224 of the shaft
portion |9817 to pull the shaftportion |9817 into
axial alignment with the shaft portion |98a when
mining the absolute weight of liquid present in 45 sealed relationship by bolts 255.
With this particular embodiment the bosses are
the tank. The arrangement of the bi-metal is
disposed at such angles to each other that four
bolts 255 may be employed to secure the head in
position. The outlet boss 256 receives an excess
to outage required for liquid contracting after >it 50 ñow check valve 251 therein, which is held in
place by a retainer 258 inserted inside of the
has been cooled by earth temperature. The ñll
conical seat 26| which receives a P.O. L. connec
ing operation will be stopped before a fixed theo
tion such as that shown in Fig. 4 at |||. The
retical level is reached if the liquid happens to
P. O. L. connection shown in Fig. 4 comprises a
be colder than the ultimate temperature which
male member carried by the head whereas in Fig.
it will assume in the tank, thereby permitting
6 the opening `is a female member. The needle
sufficient room for the liquid to expand safely
valve which controls the flow of gas to the outlet
when it warms.
such that the arm ñexes upwardly to delay the
action of the dapper valve 2|| so that there will
be a measured overñlling of the tank in relation
Referring now to the embodiment illustrated`
in Figs. 6 and 7, like numbers of reference are
opening is in this particular embodiment, disposed
in a separate boss 262 as shown in Fig. 7. ` In this
used t0 indicate parts like those already described. 60 particular construction, the valve seat 263 is
A unitary head or fitting> 23| is shown which does
formed in the body of the fitting 23| andthe
not have any Vent return valve thereon, and uses
threaded shaft is threadedly received also directly
a gauge construction wherein the shaft |83 is
in the body, _a cross drilled‘passageway 264 being
journaled in the body 23| and is connected with
provided between the two bosses 262 and 256.
the gauge by means of a sleeve 232 receiving the 65
The ñll pipe 33a. as illustrated in Fig. 9 is sov
splined shaftv 233 of the gauge |8|a in drive
relationship.
,
Furthermore, in this particular embodiment
constructed and arranged that it can be com
pletely assembled outside of the tank and inserted
into place through the riser pipe 23a. At its bot
the head 23| is adapted for batch vaporization
only and the i’ill pipe 33a does not extend to the’ 70 tom, the ñll pipe 33a is threaded to receive a ñt
ting 265 somewhat similar tothe 'fitting 201. The
bottom of the tank but constitutes the embodi
fitting 265 has a discharge opening 266 upon one
ment illustrated in Figs. 8 and 9.
side thereof and a ñapper cut-0E valve 261 piv
In view of the fact that liquid withdrawal for
oted as at 268cm the bottom and outside thereof
emptying the tank is not contemplated in this'
particular ‘embodiment which is more or less 75 where it is easily assembled. A counter weight
2,405,998ï
21| is provided to hold the valve 261 in a normally
open position.
12
sealed contact' with an adapter 3|2 by a swivel'
nut 3|3. The male member 3|| is constructed
A recess 212 upon the inside of the ñtting re
as an integral spider to serve as a guide for the
ceives the valve 261 with a shielding lip 213 at
thetop thereof to deflect the flow of liquid in
front of the valve.
valve element 286 as supported by a backcap
spring 3 | fl which rests at one end upon the spider
and steadies the operation ofr the valve. The
adapter at the bottom thereof is internally
The valve 261 and weight 21| are so balanced
that any appreciable pressure upon the weight or
threaded as at 3I5 to receive an elongated back
the pin 214 disposed upon the arm 269 of the valve,
cap 3|5 which serves as a wall in heat exchange
will cause the flap valve to leave the recess 212 loA contact with a liquid in the tank 20. The back
and enter the path of the incoming iiuid. The
cap 3|9 is received in the tank through an open
flowing fluid then causes the valve to close and
ing 3|1. The ñrst stage regulator 31 thus de
when closed, the valve positively stops the flow
scribed is assembled as a unit outside of the tank
of liquid into the tank at any point where the
and is mounted upon the tank -by means of an
float |93 is set to actuate the pin 214.
internally threaded ñange plate 3 | 8 welded to the
In this particular embodiment, as where the
tank as at 32| and external threads 322 upon the
ñtting 23| is mounted upon the tcp of the riser
adapter 3|2 are received in the flange and sealed
pipe without need for rotary movement, the arm
against leakage by litharge or some other suitable
|99 of the float may be of rigid construction with
pipe joint seal.
out the buckle joint therein .and the parts de 20
In operation, after the tank has been installed,
scribed may be inserted in place until the float
the service truck is backed into position and the
engages the bottom of the tank and is jiggled to
hose 45 connected to the iill connection.
itsextended kposition by manual vibration of the
The fuel pump d1 is started and with the check
head 32 before the bolts 255 are tightened in place.
valve 2|2 held in its normally opened position,
However, it will be yappreciated that means can ro "Ji liquefied gas will flow into the tank and develop
be employed to move the iloat outwardly a slight
therein a gauge pressure and the incoming liquid
distance so that it will move out along the tank
will force the air to the top of the riser pipe where
bottom to its correct position when the ñll pipe
it may be progressively vented to the atmosphere
33a is lowered.
or to the truck tank in the manner described.
Referring lnow to Fig. l1 an improved ñrst stage _Y As the liquid level rises in the tank it covers the
pressure reducerl 31 is illustrated in section. The
opening 3d; thereafter agitation of the vapor in
regulator body 215 is illustrated as threaded at
the tank is reduced to a minimum so that any air
opposite ends to receive union` nipples 216 with
therein may be maintained in a more or less
which thetube 36 and the pipe 43 are connected
stratified condition to be vented as suggested.
by swivel nuts 211. The inlet passage 218, which
The iioat |93 begins >to rise and operate the
is in communication with the _tube 36, is an angled
liquid level gauge to indicate the level present in
passageway extendingthrough a bridge 28| in
the tank at any given moment during filling
, the body 215 and it turns downwardly and termi
nates in a Valve port 282 bounded by a valve seat
operations.
.
As a general rule, the temperature of the liquid
283. lA yoke 284 straddles the bridge 28| and is 40 in the .truck tank 4S is higher than the ultimate
threaded at 285 to carry an externally hexagonal
temperature of the liquid in the buried tank 20,
valve member 28E upon which is mounted a valve
particularly if the tank is being serviced in mild
» disc 231 held in place by a retainer 288.
At its
or summer weather. It is a common practice to
upper end, the yoke has a reduced portion 29|
estimate the quantity of liquid supplied to a tank
threaded to receive a diaphragm plate 292 which 4: in relationship to the temperature of the liquid.
holds the diaphragm 293 in place vagainst a shoul
If this temperature is taken at the truck tank
der 294.
and the truck tank is warm as compared with
The marginal edge of the diaphragm is received
the vliquid in the tank, there will be a discrepancy
against a shoulder 295 machined in the body 215
between the meter reading 52 and the volume in
above the valve compartment 296 and is held in 50 dicated upon the liquid level gauge |8|,
place by a bonnet 291. The bonnet is threaded
vIn view of the fact that the maximum safe
to receive ascrew 298 to serve as a guide and as
level of any given liquefied gas varies with the
an adjusting member for the compression spring
temperature of that gas for any particular tank
30| at one end thereof. The other end of the
there is a possibility of the tank being overñlled
spring rests against the diaphragm plate 292 toY 55 under certain circumstances or underñlled under
urge the yoke downwardly to open the port 282 to
other circumstances, if the level limit is arbitrar
the valve compartment _2 96.
.
ily fixed for the tank regardless of temperature.
After the desired tension has been placed upon
In the particular embodiment illustrated, the
the spring 30| `to provide for the maintenance of
float |93 is pivoted as at |94 preferably below
a pressure in the valve compartment of substan
the upper ñll limit s0 that as the level rises, the
tially 5 tol 10 lbs. per square inch, a cap 302 is
arm of «the float is submerged and is brought in
received uponY the adjusting screw to lserve a
contact with the liquid. Thereby, the arm is in
double purpose,v namely to lock the screw 298
fluenced immediately and directly by the tem
againstv movement and in cooperation with a
perature thereof, this temperature being main
washer 303 to seal the'bonnet. At the top of the 65 tained quite uniform throughout the body of
cap, a half union 304 is threaded therein to sup
liquid by the turbulence created by the liquid
port a vent tube 305 at one end thereof. The
being introduced directly into the body thereof.
other end of the tube 365 carries a glycerin cup
Once the liquid comes in contact with the arm
306 with the opening 301 thereof submerged in '
glycerin 308 so that atmospheric pressure will be
maintained in the bonnet cap without water or
moisture entering therein except as mixed with
glycerin to form an anti-freeze.
'At the lower end thereon/the body receives a
|98,'the bi-metal portion thereof begins to flex
70 in response to the temperature of the liquid and
vary the position of the float |93 with respect
to the swivel eyelet 2|5 sliding on the shaft 2|4
so that the valve 2| lA may be actuated at diiierent
levels depending upon temperatures. This re
male member 3|| of a union which is held in 75 lates the ñlling operation and the maximum level
2,405,998;
13"
to >`the absolute quantity of liquid in the' tank.“
This arrangement is of particular advantage
where the tank is buried, where the temperature
is substantially uniform and a safe volume of
14"
class described,v 'a pressure storage tank receiv
ing heat from an outside source, means for with
drawing liquid from the tank, a pressure regulator
connected toV said means' to receive said liquid
and having a portion thereof disposed in heat ex
change contact with the liquefied gas in the tank.
2. In a liqueiied> gas dispensing system of the
class described, a pressure storage tank receiving>
liquid can be more closely determined, yet takes
care of the contingency of liquid being supplied
to the tank at a temperature above orbelow .the
temperature which will ultimately exist for the
heat fromV an outside source, means `for ‘with
liquid as buried in the ground. Furthermore,
drawing gas from the tank, a pressure regulator
10
the bi-metal strip in the -arm |9817 will eliminate
including a valve connected to said means and
the need of computation from the reading of the
having a chamber on the low pressure side of they
gauge since the hand, in combination with the
valve disposed in heat exchange contact with the
metal strip, will determine the absolute volume
liquefied gasin the tank.
f
of liquid gas present in the tank, by a weight
criterion, said gauge being graduated in pounds 15 . 3'. In a liquefied gas storage and dispensing de
vice of the class described, a Vstorage tank, a
if need be and computed in relationship to vapor‘
service pipe connected to the tank, a pressure
volume also present in the tank.
regulator having a bridge therein with the inlet
Once the float |93 approaches the point where
port below the outlet port, a section of said regu
the filling operation is to be stopped, the swivel
lator being disposedin said tank to receive’heat
20
eyelet ZISengages the stop 216, moves the valve
therefrom, said bridge being arranged in position
2Il out into the path of ñll liquid, the inward
to be warmed by vapor passing from said section
movement of which carries the valve 2H to its
out through said outlet port of the regulator. ‘
closed position. This immediately creates a back
4. In a liquefied gas storage and dispensing de
pressure upon the hose 45, the meter 52 stops its
vice of the class described, a storage tank, means
operation and the output of the pump 41 is by
selectively withdrawing liquid or vapor from the'
passed back to the tank -through the by-pass
tank, a service pipe connected to -saidineans'a
relief valve 54,
.
pressure regulator connected in said servìceîpipe,
Afterthe tank 2li has been filled and vented
a section of said regulator receiving heat from
the manual cut-off needle valve H2 may be
said tank for assuring vaporization of the iiuid
opened and the pet cock valve set for either
batch or flash vaporization. In the event it is
set for flash vaporization, liquid will then be
conducted to the iirst stage regulator 31 where
it will pass through the opening 282 to be, va
porized by `a reduction of pressure to the extent
that heat present in the regulator body is suf
iicient to support vaporization. Under normal
operations with the regulator buried in the pro
tective shell as shown below the frost line, the
heat therein will provide adequate vaporization
for an average draw of fuel in the service line.
In the event, however, an excessive draw is made
upon the system, liqueiied gas which does not
acquire suñicient heat to vaporize at the regu
withdrawn in the pipe.
`
`
5. In a liquefied gas storage and dispensing de
vice of the class described, a storage tank," a
ñtting for iilling and selectively withdrawing
liquefied or vaporized gas from the tank, a service
pipe connected to the iitting including aV pressure
regulator supported upon the tank and having
a portion thereof warmed by the contents of said
tank.
'
`
6. A combined pressure reducer and vaporizer
for liquefied petroleum gas comprising a body
having a valve chamber, a valve in the chamber,
means responsive to the pressure in the valve
chamber for operating said valve, and an elon
lator nozzle will fall to the bottom of the backcap 45 gated heat exchange member mounted upon the
316 where it will come in contact with the metal
thereof, which has been warmed by the liquid
body for expanding fluid :admitted to the valve `
chamber through’the Valve.
7. In a liquefied gas dispensing system having
in the tank from heat absorbed from the earth.
a storage tank, means for ñlling the tank includ
There, under the low pressure existing in the
backcap, the liquefied gas will vaporize and re 50 ing a conduit extending to the bottom of the tank,
a valve closing in the direction of inflow of liquid
turn to the top of the regulator to go into the
in the-conduit, a double valve obstructing the
service line and be carried to the second stage
outflow of liquid in said conduit, a service con
reduction, where vaporization at 1l inches of
duit, and means connecting the service conduit
water column is further assured. As mentioned,
the inlet pressure to the second stage regulator 55 with the first conduit below said double valve.
8. In a liquefied gas dispensing system having
is had at a pressure of 5# to 10#.
a storage tank, means for iilling the tank includ
Consequently, from the description had of the
ing a conduit extending to the bottom of the tank,
present invention, it will be seen that in addition
a valve closing in the direction of inflow of liquid
to the stated and apparent objects of the inven
tion, a method and apparatus for storing and 80 in the conduit, a double valve obstructing the
outflow of liquid in said conduit, a service con
dispensing liquefied petroleum gas is herebyl pro-y
duit and means connecting the service conduit
vided which is simple in construction, easy to
with the first conduit below said double valve, a
manufacture, install and service, and simple to
vaporizing expansion valve means connected to
operate, being within the safety factors pre
the conduit including a heat exchange element,
65
scribed by various authorities for the liquefied
and a pressure regulator for reducing the pres
petroleum gas industry. Furthermore, having
sure of the gas to a service pressure and to with
shown and described certain preferred embodi
stand the surge of filling liquid in the service con
ments of the present invention, it will be ap
duit when the iirst valve closes.
parent to those skilledV in the art that various
9. In combination, a plurality of tanks, a re
and further uses, modifications and changes may 70
versible pump on'one tank including a by-pass
be made without departing from the spirit and
substance of the invention, the scope of which is
commensurate with the appended claims.
What is claimed is:
`
controlled by a valve opening in the direction of _
flow of liquid through the by-pass from the outlet
side of the pump; a head upon the other tank
1.'In a liquefied gas dispensing system of the 75 including a ñller opening and a conduit connected Y
2,405,998>
16v
thereto and extending to the bottom of said other
tank, a valve in said conduitclosing in the direc
tion of flow of liquid through said conduit intov
said other tank, a iiexible conduit for intercon
necting the filler opening and the outlet side of
the pump including a manual cut-oir valve, a
liquid level responsive device in said other tank
for actuating said conduit valve at a predeter
mined level, said conduit valve >when actuated
closing with the flow of liquid throughthe conduit
and creating a back pressure in the hose to open
said by-pass valve until said manual valve is
closed.
10. A filling device for liquefied petroleum gas
storage tank comprising a die formed head se 15
cured to the tank and having an opening therein,
a safety check valve in said opening, a conduit
extending to a point adjacent the bottom of the
tank in communication with said opening, a valve
in said conduit, means responsive to the .level of 20
liquid in the tank for varying the point at which
said level responsive means operates to actuate
said valve.
16. For use in combination with a liqueñed pe
troleum gas dispensing tank; a head construct
ed to be secured to the tank including a body por
tion, a lill conduit body portion and extending
therefrom and having an opening at its outer
end, a valve closing in the direction of liow of
liquefied gas through the conduit towards the
opening and free to open with flow of liquid in
the opposite direction, and means constructed
to respond to the level of liquid in the tank for
operating the valve, said means including an ele
ment for responding to the temperature of the
liquid in the tank for governing the operation of
said level responsive means.
17. For use in combination with a liquefied pe
troleum gas dispensing tank having an opening
therein; a head adapted to close said opening in
liquid in the tank, and means interconnecting the
cluding a body member, a conduit carried by the
responsive means and the second valve including
body member to extend to the bottom of the tank
a lost motion device.
when the head is in place, a valve closing in the
11. A filling device for liquefied petroleum gas
direction of iiow of liquid through the conduit
systems comprising an inlet conduit, means for
from the body member and opening with the flow
introducing liquefied gas into the conduit, a valve 25 of liquid through the conduit in the opposite di
closing in the direction of iiow of said introduced
rection, means for responding to the level of
gas disposed in said conduit, means responsive to
liquid in the tank for actuating the closing of
the quantity ‘of liquid introduced through the
conduit for operating said valve, and means con
trolled by said responsive means for indicating
variations in said quantity.
said valve, a lilling conduit in the head in com
30 munication with the ñrst conduit ahead of said
valve and including a back flow check valve, and
an outlet conduit in the head in communication
with the first conduit between said valves.
18. For use with a liquefied petroleum gas dis
pensing tank, a head including a body receivable
on the tank, a conduit carried by the body and
opening at one end into the tank when the head
is in place, a valve closing in the direction of flow
of liquid through the conduit and out of said
opening, means constructed to respond to the
level of liquid in the tank for operating the valve,
12. In a liquefied fuel gas dispensing system
of the class described having a pressure storage
tank buried in heat exchange relationship with
the earth to absorb heat therefrom, unitary
means secured to said tank including a conduit
for performing the functions of filling the tank
with liquefied gas to a predetermined level and
evacuating the tank of liquid fuel and educting
gas from the tank for consumption through said
conduit.
=
»
’
filling and dispensing conduits in the body in
13. In a liquefied fuel gas dispensing system
of the class described having a pressure storage
tank buried in heat exchange relationship with
the earth to absorb heat therefrom, a unitary
fitting secured in sealed relation to the tank and
having a bifurcated passage therethrough, a con
duit element carried by the fitting and intercon
necting said passage and a point adjacent the bot
tom of the tank, means for controlling the iiow
of fuel through one of said bifurcations includ
ing a manually controlled valve and a check valve,
and means for controlling the flow of fuel through
the other bifurcation including a check valve and
a valve closing outwardly, means interconnect
4.
50
ing theY last two valves for holdingr the outwardly
closing valve open when said last check valve
is moved positively to its open position.
14. For use in combination with a liquefied pe
troleum ~gas dispensing tank; a head constructed 60
to be secured in sealed relation to the tank in
cluding a fill conduit, a valve controlling the in
flow of liquefied gas through the conduit, and
means constructed to respond to the level and
temperature of liquid in the tank for operating 65
the valve.
l5. For use in combination ‘with a liquefied pe
troleum gas dispensing tank; a head receivable
on the tank including a> lill conduit, a normally 70
open valve for controlling the inñow of liqueiied
gas through the conduit, and ymeans, construct
ed to respond to the level of liquid in the tank
for actuatingl the valve, said mean-s including..
means for responding tothe temperature of the 75
communication with the conduit head of the
valve, and automatic valve means controlling the
outflow of gas through the dispensing conduit.
19. In a liquefied gas dispensing system of the
class described, a pressure storage tank buried
in the ground to receive heat from the ground,
means including a conduit for iilling the tank
to a predetermined level with liquefied gas to
provide a body of liquid in the tank and for with
drawing the gas from the tank, said means in
cluding an inlet for receiving filling liquid into
the conduit and an outlet for dispensing liquid
from the conduit, a closed bottom tube extend
ing into the space within the tank in heat ex
change relation with the body of liquid, and a
pressure reducer connected to said outlet and
mounted upon said tube With the valve compart
ment of the pressure reducer draining into the
tube.
20. In a liquefied gas dispensing system of the
class described, the combination of a pressure
storage tank buried in the ground to store in heat
exchange relationship with the ground a liquefied
petroleum gas in both its liquid and vapor phases,
means for educting gas from the tank in its liquid
phase, a tube in the tank in heat exchange rela
tionship with the liquid in the tank, a pressure
reducer connected to said educting means and
mounted upon said tube with the valve compart
ment of the pressure reducerrdraining into the
tube.
21, In a liquefied gas dispensing system of the
class described, the combination of a pressure
2,405,998
17
18
substantial volume on the outlet side of the valve
into which chilled unvaporized gas gravitates to
storage -tank _buried in the ground below the frost
line to store in heat exchange relationship with
the ground a liquefied petroleum'gas in both its
liquid and vapor phases, a riser pipe upon said
tank extending to a point above the frost line, a
fitting carried bythe riser pipe including a ~con
duit extending from the iitting into the tank for
educting gas from the tank in its liquid phase, a
absorb heat.
~
.
27. For use in a liqueñed petroleum gas dis
pensing system having a pressure storage tank; a
head receivable upon the tank, said head com
prising a unitary body having a .plurality of bosses
thereon, means for filling and emptying the tank
associated with one boss and including a passage
pressure reducer for lowering the pressure upon
the educted liquid from the pressure -thereon in
the tank to a pressure below said pressure to ex
V,pand the educted liquid, and means connecting
said conduit through the ñtting and pressure re
ducer and arranged for warming said educted
liquid with heat from `the contents of said tank.
22. In a liquefied gas dispensing system of the
class described, a pressure» storage tank .buried
in the ground to receive heat from the ground, _
fitting means secured to the tank for filling the
through the body and a conduit element carried
by the body in communication with said passage,
a service connection and control in another boss
including a service passage through the body hav
ing a section for communication with the top
of the tank, means interconnecting said service
passage and conduit element including a valve
for closing said section, means for obstructing the
iniiow of liquid through said conduit element but
readily permitting outiiow through the conduit
tank with liquefied gas -to a predetermined level, 20 element at all times, and means carried by said
body for operating said obstructing means at a
said heat vaporizing said gas to maintain a gauge
predetermined level of liquid in the tank.
pressure in the tank, means for educting liquefied
28. For use in a liquefied petroleum gas dis
gas from the tank for consumption including a
pensing system having a buried storage tank and
service conduit, said conduit including a pressure
including a riser pipe; a head adapted to be re~
regulator having a valve compartment connected
movably connected to the riser pipe comprising a
to said eductingV means and a regulator body
body having a plurality of bosses thereon one
mounted upon said tank having a backcap in
machined to provide space for receiving a iilling
heat exchange relationship with the liquid con
valve and another machined to provide space for
tents of the tank below said .predetermined level,
said valve compartment and backcap having a 30 a service line cutoff valve, a dip tube carried by
the body to extend to the bottom of the tank when
common outlet for gas vaporized under reduced
the head is installed and disposed in communica
tion with the filling valve space and with said
23. In a liquefied fuel gas dispensing system of
service valve space.
the class described, a pressure tank ,buried in‘ the
29. For use in a liqueiied petroleum gas dis
ground for storing liquid gas and to receive heat
pensing system having 'a buried 'storage tank
from the ground, said heat vaporizing said gas
pressure;
>
’
to maintain a gauge pressure in the tank, means
including a riser pipe; a head adapted to be
for educting liqueñed gas from the tank in its
liquid phase, a unitary pressure-regulator con
nected to said means to receive the educted liquid
fuel and having an elongated backcap thereon,
means for mounting the regulator upon the tank
thereon, one machined to provide space for re
with the baekcap disposedinside the tank, and
means for insulating the regulator from heat eX
change contact with outsidetemperature.
24. In a liqueiied gas dispensing system of the
class described, a pressure storage tank buried in
the ground to receive heat from the ground and
having therein a liquefied gas, said heat Vaporiz
ing said gas to maintain a gauge pressure in the ,.
tank, means for educting gas from the tank under
said gauge pressure to a fitting outside the tank,
a pressure reducer for lowering the pressure upon
the educted gas from said gauge pressure, and
removably connected to the riser'pipe compris
ing a unitary body having a plurality of bosses
ceiving ay combination evacuating and iilling
valve in one boss and another machined to pro
vide space fora service line cutoff valve in an
other boss, and a dip tube to extend to the bottom
of the tank when the head is installed and com
municating with the evacuating-filling valve
space and said service valve space.
30. For use in a liquefied petroleum gas dis
pensing system having a buried tank and a riser
pipe; a head adapted to be removably connected
to the riser pipe comprising a die formed body
having a plurality of machined bosses thereon,
filling means in one 'boss for connection with a
filler hose, an eduction control in another boss
conduit means for conducting'the educted liquid ,
for connection with a service line, a passageway
from the fitting to the pressure reducer disposed
in heat exchange relationship with the contents
between said filling means and eduction control,
a passageway interconnecting the education con
trol and the top of the tank when the head is
installed, means for closing the first passageway
and opening the other passageway to the riser
pipe, and dip tube means carried by said body
ofthe tank. .
>
i
«25. In a liquefied gas storage and dispensing
device of the class described, a storage tank, a
service pipe connected to the tank to educt liquid
therefrom `and including a ñrst stage pressure
regulator and a section of the pipe ahead of the
first `stage regulator receiving latent heat of
connected to the filling means.
'
“
'
31. For use in a liquefied petroleum gas dis
pensing system having a'buried tankincluding
a riser pipe; a head adapted to be removably
connected to the- riser pipe comprising an integral
body having a plurality of machined bosses
thereon, a iilling valve in one boss, an eduction
liquid.
`
control in another boss for connection with a
26. A pressure reducer for vaporizing liqueiied
gas comprising a body portion, an inlet and out 70 service line and having'two inlets, one leading
to said iilling valve and the other to the _riser
let for the reducer, a valve between the inlet and
pipe when the head is installed, means for clos
outlet, a diaphragm formingone wall of a valve
ing said iirst inlet and opening the second inlet
chamber surrounding said valve for operating the
to the riserv pipe,- dip tube means carried by said
valve, and an elongated backcap upon the body
providing an expansionchamber therebeyond of 75 body connected tothe filling valve, and means
vaporization from the contents of said tank said ,
regulator being arranged to accomplish the ñrst
stage of pressure reduction upon the educted
19
2,405,998
including a valve in said dip tube for preventing
the iilling of the tank above a predetermined
level.
32. In a liqueñed gas dispensing system having
a storage tank provided with a threaded opening,
20
age tank comprising a forged body'constructed
and arranged to be fastened to said tank, a filling
passage therethrough and a back pressure check
valve disposed therein, a service conduit in said
body including means upon the body for securing
a headJ means for mounting the head with re
a service pipe thereto, a liquid eduction tube as
spect to said opening in sealed relation, said head
sembled on the body in communication with the
comprising a unitary body, a gauge mounted
passage to extend to a point adjacent the bot
thereon, a filling device, normally open control
tom of the tank, a vapor eduction passageway in
means connected to said ñlling device, and float 10 said body, means for selectively connecting the
means for operating said gauge and closing said
service conduit in communication with the educ
normally open means to prevent overfilling of
tion tube or the eduction passageway and includ
the tank.
ing means for closing off one While the other is
33. In a liqueiied gas dispensing system having
in operation.
a storage tank provided with a threaded opening
39. In a liquefied petroleum gas dispensing sys
in connection therewith, a head, means for
tem having an underground storage tank; a head,
mounting the head with respect to said opening
a fill conduit carried by the head and extending
in sealed relationship, said head comprising an
to the bottom of the tank, valve means con
integral body, a gauge mounted thereon, a filling
trolling the inflow of liqueñed gas through the
device including a conduit carried by the body, 20 conduit, means responsive to the levelV of liquid
normally open control means in said ñlling de
in the tank for operating the valve and including
vice, and means for operating said gauge and
means responsive to the temperature of the
closing said normally open means for preventing
liquid in the tank for governing the operation
overfilling of the tank.
of said level responsive means.
34. For use in a liqueiied petroleum gas dis 25
40. In a liquefied petroleum gas dispensing
pensing system having a pressure storage tank;
system, a tank, a head, .a fill conduit carried
a head adapted to be secured in sealed relation
thereby, said head comprising valve means con
to the tank and comprising a die formed body
trolling -the inflow of liquefied gas -through the
with a plurality of bosses thereon, a service outlet
conduit, mechanism responsive to the level of
in one boss for communicating withthe tank, a 30 liquid in the tank for loperating the valve in
ñlling device disposed in another boss, and means
cluding heat sensitive means arranged to be sub
carried by the body connected to the filling device
merged in head exchange contact with the liquid
to place it in communication with the tank and
and responsive to the temperature of the liquid
including a conduit receivable in the tank and a
in »the tank for modifying the action of the bal
trap valve to prevent overfllling of the tank, the 35 ance of the rest of said mechanism.
outlet. of said means being below the inlet of
4l. For use in' a liqueñed petroleum fuel dis
the service outlet so that filling liquid will not
pensing system having a pressure storage tank;
enter the service outlet.
a head receivable upon the tank comprising a
35. A unitary head of the class described com
unitary body having a plurality of bosses; filling
prising a forged body having upwardly extending 40 means extending through one of the bosses in
bosses thereon, one of said bosses having a ma
cluding a. conduit felement carried by the body
chined opening therein with a safety check valve
and adapted to extend to the bottom yof the tank
mountedtherein, a drilled conduit leading from
when the head is in place; dispensing means
the opening to the bottom of the body, means at
extending through another boss and including a
the opening for mounting a tube upon the body 45 passage in communication with said conduit ele
in communication with said conduit, an eduction
ment and a passage in communication with the
passage communicating with said conduit having
top of the tank when the head is in place, "a
therein a shut-off valve, a second conduit opening
Valve for obstructing at will the ñow of fuel
on the bottom of the body and leading to said
through one of the passages; and means asso
passage, and a valve placing the passage in com 60 ciated with said ñlling means for obstructing
munication with one of said conduits.
the flow- of filling liquid through the conduit ele
36. A unitary assembly for connection with re
ment including a device arranged to be actuated
spect to a tank for storing and dispensing lique
when a predetermined level of liquid in the tank
iied petroleum gas, comprising a body having a
is reached.
passage therethrough, a, ñlling conduit carried by 65
42. For use in a liquefied petroleum fuel dis
the body in communication with the passage and
pensing system having a pressure storage tank;
extending to the bottom of the tank when the
a head receivable upon the tank comprising a
assembly is installed, a branch conduit leading to
unitary body having a plurality of bosses; ñlling
a service connection, a conduit arranged to lead
means extending through one of the bosses in
from the top of the tank into the branch and
cluding a conduit element carried by the body
a selector valve disposed at the junction of said
and adapted to extend to the bottom of the tank
conduits.
when Athe head is in place; dispensing means ex
37. In combination, a delivery tank means, a
tending through another boss and including a
dispensing tank means, means for detachably
passage in communication with said conduit ele
connecting the tank means to convey liquid from
ment and a passage in communication with the
one tank means to another, including a pump
connected to one tank means; a head connected
to the other tank means and a iiexible conduit
top of the tank when the head is in place, a valve '
head, a valve in the conduit, and a device respon
arranged to be actuated when a predetermined
level of liquid in the tank is reached.
WILLIAM C. BUTTNER.
SAVIN L. SUNDSTROM.
for yobstructing at will the flow of fuel through
said passage in communication Wi-th said conduit
interconnecting the pump and head, said pump
element; and means associated with said ñlling
including a pressure relief by-pass connected to
means for obstructing the new of ñlling liquid
70
the outlet of the pump, a conduit carried by said
through the conduit element including a device
sive to the level of liquid in the dispensing tank
means for actuating the last mentioned valve.
38. A head for a liqueñed petroleum gas stor
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