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Патент USA US3095909

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July 2, 1963
BR. BILLINGTON
3,095,899
LIQUID OUTAGE CONNECTION
Original Filed May 5, 1958
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INVENTOR.
Eva/15 R Bil/Myron
July 2, 1963
E. R. BILLINGTON
3,095,899
LIQUID OUTAGE CONNECTION
Original Filed May 5', 1958
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United States Patent 0
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Patented
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July 2, 1963
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in pressure across it ‘for equalizing pressures when low ?ow
3,995,899
LIQUID OUTAGE CONNEOTION
Evans R. Billington, Chicago, llL, assignor to The Bastian
Blessing Company, Chicago, Ill., a corporation of
Illinois
Continuation of application Ser. No. 733,125, May 5,
1958. This application Mar. 2, 1960, Ser. No. 12,475
31 Claims. (Ci. 137-4545)
conditions exist to permit full opening of the check valve
in use.
A further object of the invention is to provide a means
to lock the excess ?ow check valve on its seat and to vary
the distance the valve may move away from its seat.
The invention is also characterized by a shock valve
disc which under ?lling conditions is movable to its closed
position with respect to its stem and to its valve seat in
This invention relates to excess flow check valves for
double guided relationship thereby yet is positively con
use in lique?ed petroleum gas equipment, and more par 10 trolled by said valve stem to maintain a closed position at
ticularly to an excess ?ow check valve adapted for use in
all other times but Without any positive control upon the
a liquid withdrawal outlet of liquid eduction or fill con
part of the stem to force the valve disc open.
trol ?ttings, or both, that are mounted on storage tanks
Another object of the invention is to provide an im
that receive sensible heat from the ground or atmosphere
proved excess ?ow check valve in which the valve stem
whereby the vapor pressure developed in the storage tank 15 is accessible for movement independently of the valve disc
can be employed for ?lling the fuel tank of a tractor, or
and the valve ‘disc is inaccessible yet movable in its
the like, with lique?ed petroleum gas in its liquid phase.
closing direction by valve stem movement.
Other objects and advantages of the invention will be
application U.S. Serial No. 733,125 ?led May 5, 1958, 20 come apparent as the description proceeds in accordance
now abandoned.
with the drawings, in which:
The present application is a continuation of my copending
Excess ?ow check valves are normally used as auto
FIG. 1 is a side elcvational View, partly in vertical sec
matic out?ow check or shut-off valves in eduction lines of
tion, showing one embodiment of my excess ?ow check
lique?ed petroleum gas dispensing systems as a safety pre
valve mounted on a storage tank and its relationship to
caution to prevent the escape of gas through the line in 25 a ?ll and eduction means for the tank;
the event a break occurs in the line beyond the valve.
FIG. 2 is an enlarged view of my excess ?ow check
These valves are generally located at the tank and close in
valve shown in vertical section in FIG. 1;
the direction of out?owing gas. Although various types
FIG. 3 is a view similar to FIG. 2 but showing the valve
or" ?ow check valves have been employed in the past with
in its open position;
domestic installations of lique?ed petroleum gas systems,
FIG. 4 is a view in vertical section of a second embodi
they are subject to the objection that they are not satis
ment of my invention in which the excess ?ow check
factory for the withdrawal of liquid at rates deemed
satisfactory for use in ?lling the fuel tanks of tractors,
or the like. Moreover, any adaptation thereof for that
valve is mounted directly in the wall of a tank;
FIG. 5 is a vertical sectional View of a third embodi
ment of the excess ?ow check valve of my invention show
purpose detracts from their use as a safety valve and 35 ing the valve in its closed or slugged position;
permits a spilling of the gas in a dangerous and wasteful
manner when so used. For example, even though the
excess ?ow check valve is subject to the pressure within
the storage container from which liquid is to be with
drawn, it is normally open, and if a coupling joint beyond
it is being loosened to make a connection, the bleed at
the joint occurring during loosening permits the space
beyond the excess ?ow check valve to be ?lled with liquid.
FIG. 6 is a view similar to FIG. 5 but showing the
valve in its open position;
FIG. 7 is a view similar to FIG. 5 but showing the
valve locked in its closed position against the expansive
force of the spring tending to open it;
FIG. 8 is a vertical sectional view of a fourth embodi
ment of the excess ?ow check valve of my invention show
ing the valve in its closed or slugged position; and
FIG. 9 is a view similar to FIG. 8 but showing the
bers separate and even more liquid is ejected before the
45 valve in its open position.
liquid ?ow closes the excess ilow check valve. Then too,
Reference is hereby made to my co-pending applica
there is always the possibility that the valve is cocked
tion Serial No. 637,119, now Patent No. 2,909,188 of
or slightly open when closing under such energetic con
October 20, 1959 which has been reissued ras Reissue No.
ditions thereby hindering or preventing the making of a
25,272 of October 23, 1962, for other embodiments of
This liquid expands in all directions when the joint mem
connection to the fuel tank to be ?lled.
my invention and the general discussion as to the attri
Accordingly, it is an object of the present invention to 50 butes of my invention. iIn the application mentioned the
provide an excess ?ow check valve heaving a particular
check valve and locking relationship is one in which ‘the
construction which assures against any excess ?ow of gas
valve disc and stem move as 1a unit. In the present in
while the coupling is being loosened and thereafter, being
already closed prevents accidental discharge of gas from
vention the arrangement is one essentially in which the
after the new coupling is being made and then will permit
an unobstructed normal high rate of flow of the gas during
upon the stern and the valve cannot be positively dis
placed to open position by movement of the stem.
valve disc and its valve stem move as independent ele
the storage container in which the gas is stored until 55 ments, the valve disc being slidably in guided relation
fuel tank ?lling operations.
Another object of the invention is to provide an excessv
?ow check valve, as described, which is held against open
ing prior to the time when connection is made at the out
let thereof either with a manual control valve or other
means that serves as the coupling member for the out
Referring now to the several ?gures of the drawing, and
particularly to the form of :the invention shown in FIGS.
1, 2 and 3, a tubular liquid ?ll and eduction ?tting 2 is
mounted on a storage tank 4 with which it is in open
communication at a point adjacent the bottom through
conduit 16. As shown in FIG. 1, the ?tting 2 is threaded
flow of liquid gas to a tank to be ?lled, yet will open and
at its lower end to engage in a threaded opening in the
remain normally open under operative conditions and 65 collar 6 that is Welded or otherwise rigidly attached to
pressures existing under normal ?lling operations from
the wall of the tank ‘4. Also as indicated in FIG. 1, the
the storage tank to a fuel tank being ?lled.
?tting 2 has two laterally extending hollow bosses 8 and
Still another object of the invention is to provide bleed
10, the former of which constitutes an outlet ‘adapted for
passage means in the excess ?ow check valve having a
high drop in pressures across it under potentially high
?ow conditions when the valve is closed, and a low drop
permanent connection to a service conduit vand the latter
of which forms the housing and the outlet connection for
the excess ?ow check valve assembly 12 which embodies
3,095,899
3
4
the invention. Carried by the inner end of the ?tting
in FIG. 1. 0n the other hand in making a connection
since as shown in FIG. 3, the stem 46 of the spring is
smaller than the axial opening 48 in the valve member
2 and in ?uid communication with the interior of the
tank 4 and the main passage 14 is a liquid eduction pipe
16 which as already mentioned extends to a point adja—_
cent the bottom of the tank.
In order to permit the tank to be ?lled, the main pas
sage 14 is provided with a removable cap 18 at its outer
end and an upwardly seating spring pressed valve 20
mounted inwardly of the cap 18 ‘and adapted to be opened
by the pressure of the incoming liquid or ‘by the ?ller
pipe which discharges the liquid as more particularly
described in Norway 2,361,866. It will be understood
34 and the connection ‘between the washer 50 and the
end of the spring is not gas tight, the passage 48 will act
to reduce the very large pressure differential existing
across the valve before an operating connection is made
to a safe operating pressure differential at which the valve
will open to permit flow.
In the form of the invention shown in FIG. 4, the stop
36 on the valve member is a separate element threaded
to the valve member 34a and the ?tting is a single open
ing one ‘comprising a valve housing 64 which carries an
that as soon as the inward pressure on the valve is re
integral valve seat 66, and is adapted to be threaded di
leased, it will automatically close under the action of the
spring 22. Flow from the tank through the boss 8 is 15 rectly into the collar 6 of the tank 4. The springs, valve,
valve stem and washer of this form are substantially the
controlled by a valve, not shown, by actuation of the
same as the corresponding parts in the form of FIGS. 1,
hand wheel 24.
.
The excess ?ow check valve comp-rises a spider-like
2 and 3 and bear the same reference characters. How
ever, the stop ?ange 68 on the valve stem is made sepa
valve seat member 26 which is threaded into the hollow
boss 10 at 28, and is provided with ?ow passages 36 there 20 rate from the stem and then threaded thereon, and a
gasket 70 is provided for the cap 62 along with a bleed
through and a centrally disposed guide 32 vfor the valve
conduit 71 which vents the compartment before the plug
member 34. The valve member 34 is provided with a
62 is disengaged. The operation of the valve of this
stop ?ange 36 at one end to limit inward movement of
form is substantially the same as that of FIGS. 1, 2 and 3.
the valve by engagement with the guide 32, ‘and has its
other end threaded into the valve disc 38 which has its 25 _ Referring now to FIGS. 5, 6 and 7, a somewhat simpler
form of valve is illustrated in which the valve stem is
inner face beveled at 48 to engage 'a correspondingly bev
eled valve seat at 42 on the valve seat member 26 as
threadedly engaged in the spider ‘guide. The valve of
this form includes an exteriorly threaded spider-like valve
more particularly'shown in FIGS. 2 and 3. In order
to hold the valve 38 normally on its seat, it is provided - seat member 72 which is adapted to be threaded into any
with a coil spring 44 which bears at its inner end against 30 ?uid passage, and like the valve seat members of the
other forms of the invention is provided with a conical
the valve seat member and has its other end provided
valve seat 74 to receive a similarly shaped face 76 on the
with a straight axially extending portion which serves as
valve 78. In order to bias the valve away from its seat,
a valve stem 46 that extends through the coil and is slid
- a coil spring'80 is con?ned vbetween the valve and a
able in an axially arranged opening 48 in the valve mem
ber 34. The free end of the portion 46 passes through a 35 shoulder 82 on the valve seat member. As in the other
washer 50 and is secured against removal by deformation
forms of the invention, the valve 78 is provided with a
circular groove 84 to receive the inner end oi‘ the spring.
at its end as indicated at 52. With this arrangement the
However, in this form, the valve disc is slidable on the
valve member and valve disc are free to slide inwardly to
open position when :the outer end of the spring 44 or ' valve member or stem 86 which has an inner smooth por
stem 46 is displaced inwardly. The valve is normally 40 tion 88 and an ‘outer threaded portion 90 which is ad
justably threaded in a threaded collar 92 on the valve
biasedto move away from its seat 26 "by a second coil
seat member. This threaded connection allows the ef
spring 54 of lesser strength than thespring 44'. The
iective length vof the valve stem and the valve head move
second'spring is con?ned under compression between the
ment to be varied within the limits determined by the
valve disc 38 and the valve seat member 26 with One end
thereof located in a groove 56 in the valve disc.38 and 45 enlarged outer end 94 on the valve stem and the nut 96
lon the inner end. The outer end 94 is provided with a
the other end bottomed in a groove 58 inthe valve seat
kerf 98 for engagement with a screw driver or other tool
member 26.
In the normal operation of the valve, the parts will
to screw the stem into or out of the collar 92 as desired.
assume the. positions shown in FIGS. 1 and 2 with the
stronger spring 44 by its stem 46 holding the valve against
its seat against the biasrof the Weaker spring 54. How
When the valve stem 86 is adjusted to the position
shown in FIGS. 5 and 6, the valve may assume either the
position of FIG. 5 in which the valve has been moved to
ever, when an outlet connection, as for example, a pipe 60
its closed position against the action of the spring 80 by a
(FIG., 3) is threaded into the threaded discharge open
ing of the boss 18, it will engage and positively compress
surge or sudden onrush of liquid through the valve, or
the position of FIG. 6 in which the valve is urged to its
fully open position by the spring when the pressure he
comes substantially equalized across the valve. In the
position of the valve in FIG. 7, the valve has been locked
in closed position against its seat by screwing the stem
the stronger spring 44 and at the same time shift the 55
stem 46, inwardly allowing the weaker spring to move the
valve and valve member inwardly a distance limited by
the engagement of the ?ange 36 with the guide 32. In
outwardly and forcing the valve head against the valve
this position of the valve, the pressure on both sides of
the valve will become equalized to an extent such that 60 seat by compressing the spring. As shown at 188 in
FIG. 7, a resilient gasket may :be placed around the valve
there will be a steady flow out through the pipe 60, but
if ‘due to the breakage of the pipe 60 or for some other
stem 86 between the valve 78 and the stern nut 95 in
reason, there would ‘be asudden drop in pressure on the
outlet side ofthe valve, and a consequent rush of liquid
through the valve, the valve will compress the weaker
spring, the stronger spring still being held in its com
order to partially seal the joint between the valve and
the nut. While the enlarged outer end 94 of the valve
stem 86 has been shown as being provided with a kerf
to receive a screw driver or similar tool, it will be under
pressed ,condition by the end ofthe pipe 60, and allow
the valve to, close thus cutting off the ?ow and preventing
stood that any other suitable tool-engageable means may
be used depending on the type of tool it is desired to use.
waste of or damage by the escaping fluid, When it be
comes desirable to disconnect the pipe 60 the valve disc
As in the form of the invention shown in FIGS. 1, 2, 3
and 4, the excess ?ow check valve of FIGS. 5, 6 and 7
38 will be pulled shut by the stronger spring before the
threaded relationship is broken and any gas in the pipe
may act as a pressure equalizer by reason of the passage
between the valve 78 and the valve stem 86, the cross
section of the stern being less than the cross-sectional
69 will bleed out before ?nal severance. In order to close
the outlet end of the boss when a conduit such as pipe 68
area of the opening in the valve through which the stem
is not connected thereto a plug 62 is provided, as shown 75 passes.
.
3,095,899
Referring now to FIGS. 8 and 9 an arrangement is
provided which is quite similar to that shown in FIGS.
1, 2, 3 and 4 in that the valve stem 46 and the valve
member 34 are unitary as identi?ed by the numeral Hi2,
same being slidably mounted in the guide 32 of spider
like seat member 26 formed integrally with the housing
64. The valve disc 38 is slidably mounted on the valve
6
ried by said movable element and adapted to close against
said seat in the direction of ?uid ?ow, spring means bias
ing said valve away from said seat in a direction opposite
to said ?uid ?ow, adjustable means carried by said mem
ber for holding said valve in closed position against the
force of said spring means and for releasing said spring
means selectively a variable distance, said movable mem
stem 1%2 as described in connection With FIGS. 5 to 7
inclusive by elements including the nut 95 and a sealing
ber, valve, spring means, seat member and adjustable
in a radial direction as at 194.- where it is received in an
element.
5. An excess ?ow check valve assembly comprising a
means being readily removable from said pipe as a unit
gasket ‘100 for purposes already described.
10 in the direction of ?uid ?ow, said adjustable means com
In this embodiment the end of the spring 44a terminates
prises a spring whose outer end is secured to said movable
easily assembled relationship in a cross hole 1% in the
outer end of the stem 192. With this arrangement, the
valve disc can be released from its closed position by an
element 168‘engaging the outer end of the stem M92 or as
shown in said Norway patent and FIG. 3 herein by the
inner end of the pipe 60 engaging the outermost turn
of the coil spring 44. However, in this latter case, a
?anged washer ‘110 is mounted on the outer end of the 20
spring With the ?ange 112 thereof received within the
end coils and the washer part provided a bearing surface
for the end of the pipe 61!.
pipe for conveying ?uid therethroug‘h, said pipe having a
separate valve seat member detachably secured therein,
said member having a valve seat thereon, an axially mov
able element carried by said member, a valve slidably car
ried by said movable element and adapted to close against
said seat in the direction of ?uid ?ow, spring means bias
ing said valve away from said seat in a direction opposite
to said ?uid ?ow, rotary adjustable means carried by said
member for holding said valve in closed position against
the force of said spring means and for releasing said spring
Having thus described the invention and several em
means selectively, said movable member, valve, spring
bodiments thereof, it will be apparent to those skilled in 25 means, seat member and adjustable means being readily
the art how the stated objects are attained and how var
ious and further changes can be made without departing
from the spirit of the invention, the scope of which is
commensurate with the appended claims.
What is claimed is:
30
1. An excess ?ow check valve assembly comprising a
pipe having an outlet opening for conveying ?uid there
through, said pipe having a separate valve seat member
detachably secured therein, said member having a valve
removable from said pipe as a unit in the direction of ?uid '
?ow, said adjustable means comprises a compression
spring whose coils are guided by the side wall of said valve
seat member with its free outer end connected to the outer
end of said movable element.
'6. An excess ?ow check valve comprising a housing
having a ?uid ?ow passage therethro'ugh open at one end,
a valve seat element in said passage having a valve seat
adjacent to the other end of said passage, guide means in
seat thereon, an axially movable element carried by said 35 said passage spaced from said other end, a reciprocable
member accessible through said opening, a valve slidably
means in said pass-age accessible for adjustment through
carried by said movable ‘element and adapted to close
said open end extending through said guide means for
against said seat in the direction of ?uid ?ow, spring
relative free movements in a valve-closing direction and
means biasing said valve away from said seat in a direc
in a valve opening direction, a stop element on said recip
tion opposite to said ?uid ?ow, adjustable means carried
rocable means, a valve member carried by said recip
by said member for holding said valve in closed position
rocable means for movement into and out of engagement
against the force of said spring means and for releasing
with said valve seat, means for moving said reciprocable
said spring selectively, said movable member, valve,
spring means, seat member and adjustable means being
within and accessible through the outlet opening of said
pipe and readily removable from said pipe through said
outlet opening as a unit.
2. The combination called for in claim 1 including
bleed means for said ?uid through said valve, and means
carried by said movable element to close said bleed means
when said valve is in its closed position
.
3. An excess ?ow check valve assembly comprising a
pipe for conveying ?uid therethrough, said pipe having
a separate valve seat member detachably secured therein,
said member having a valve seat thereon, an axially mov
able element carried by said member, a valve slidably
carried by said movable element and adapted to close
against said seat in the direction of ?uid ?ow, spring
means vbiasing said valve away from said seat in a di
rection opposite to said ?uid ?ow, adjustable means car;
ried by said member for holding said valve in closed
position against the force of said spring means and for
releasing said spring means selectively, said movable
member, valve, spring means, seat member and adjustable
means being readily accessible and removable from said
pipe as a unit through an end opening in said pipe in said
direction of ?ow, bleed means for said ?uid through said
valve, and resilient sealing means between said valve and
movable element for closing said bleed means when said
valve is carried by said movable element to its closed
means and valve member towards said one end to carry
the valve member into a closed position, and resilient
means released by said moving means for biasing said
reciprocable means and said valve member away from
said seat a distance limited by said stop element whereby
said valve member and resilient means cooperate to per
form an excess ?ow valving action when said valve mem
ber is disposed at said limited distance.
7. A lock-type excess ?ow valve comprising an open
ended hollow tubular body providing a valve seat ad
jacent its one end, a valve member operatively associated
with said valve seat for sealing engagement thereagainst,
a valve stem within said body extending from said valve
member toward the other open end of said body, retainer
means reciprocable within said body, said valve stem
being slidably supported by said retainer means for rela
tively free movement in a valve-closing direction and for
limiting ‘retention in a valve-opening direction, ?rst re
silient biasing means normally urging said retainer means
and valve stem in a valve closing direction, and second
resilient biasing means of lesser force than said ?rst bias
ing means normally urging said valve member in a valve
opening direction, said retainer being normally positioned
by said ?rst biasing means to e?ect seating of said valve
member against said valve seat, whereby said valve mem
ber and second biasing means cooperate to perform an
excess ?ow valving action only upon shifting of said re-V
70 tainer means toward said one end of the body to release
position.
said valve stem for free slidable movement.
4. An excess ?ow check valve assembly comprising a
8. A lock-type excess ?ow valve comprising an open
a pipe for conveying ?uid therethrough, said pipe having
ended hollow tubular body providing a valve seat ad
a separate valve seat member detachably secured therein,
jacent its one end, a valve member operatively associated
said member having a valve seat thereon, an axially mov
with said valve seat for sealing engagement thereagainst,
75
able element carried by said member, a valve slidably car
a valve stem within said body extending from said valve
3,095,899
8
0
member toward the other open end of ‘said body, retainer
seat, ?rst means between said spider and valve disc means
normally urging the valve disc means away from said
means reciprocable within said body, said valve stem
being slidably supported by said retainer means for rela-'
valve seat, and means for holding said valve disc means
tively free movement in a valve-closing direction and for
limiting retention in a valve-opening direction, ?rst re
silient biasing means normally urging said retainer means
and valve stem in a valve-closing direction, second re
silient biasing means of lesser force than said ?rst biasing
means normally urging said valve member in a valve—
in closed position again-st the force of the ?rst mentioned
means including a resilient element connected to said
support means normally urging the stem outwardly to
carry the stop against the valve disc means and drive
the valve disc means to close against said valve seat,
the outer ends of said holding means and support means
opening direction, said retainer being normally positioned
being disposed in said month Within the length of said
internal thread and accessible from outside of the housing
through the mouth for axial displacement inwardly to re
move the resilient element from its operation of closing
by said ?rst biasing means to ettect seating of said valve
member against said valve seat, whereby said valve mem
her and second biasing means cooperate to perform an
excess ?ow valving action only upon shifting of said re-’
the valve disc means.
tainer means toward said one end of the body to release 15
said valve stem for tree slidable movement, and bleed port
means for restricted ?uid flow into said valve body when
12. An excess flow check valve comprising a housing
having a ?uid ?ow passage therethrongh open at one
end and a valve seat member in said passage de?ning
a valve seat thereon opening towards the other end of
said valve member is in its closed position.
'
9. A lock-type excess ?ow valve comprising an open
said housing, a valve carried by said member and adapt~
ended hollow tubular body de?ning a chamber at one‘ 20 ed to close against said seat and having a bleed passage
end, a ?ow communicating bore of relatively smaller cross
means for equalizing pressures on opposite sides of the
section at the other end, and an intermediate annular
valve, a support guide in said passage, ?rst spring means
shoulder therebetween, said body de?ning a valve seat at
between said support guide and valve to bias said valve
the outlet opening of said bore, a valve member opera
away from said seat, and means including a second
tive to seal against said valve seat, a valve stem retainer 25 spring means for holding said valve in closed position
means within said body extending from said valve mem
against the biasing force of said ?rst spring means, and
ber toward said chamber and reciprocable within said
annular means axially movable within said ?uid flow
chamber and slidably supporting the valve member, the
end of said retainer means opposite said valve member
being slidably supported by said body for relatively free
movement in a valve closing direction and for limiting re
tention in a valve opening direction, ?rst resilient biasing
meanssupported on said shoulder'and normally urging
passage and accessible for actuation solely through said
open end for releasing said ?rst spring means selectively
30 to open said valve.
13. An excess ?ow check valve comprising ‘a housing
member having a ?uid flow passage therethrough and
terminating at one end in an internally threaded mouth
said retainer means and valve stem in a valve closing di
for the reception of a threaded pipe end therein, a valve
rection, and second resilient biasing means of lesser force 35 seat element in said passage having a valve seat thereon
than said ?rst biasing means normally urging said valve
member in a valve opening direction, said retainer means
facing towards the other end of said housing, a spider
member in said passage between said mouth and valve
providing stop means adapted to be engaged by said valve
seat having a central opening therethrough, a valve sup
member for limiting sliding movement thereof against the
port means extending through said central opening and
force of said :?rst resilient biasing means, whereby to re 40 through said valve seat and having a stop element there
lease said valve member for slidable movement and enable
on, a valve element slidably mounted on said valve sup
said second biasing means vand said valve member to per
port means for movement between said stop] element and
form an excess valving action.
* "
10. A lock-type excess ?ow valve comprising an open
ended hollow tubular body providing a valve seat ad
jacent its one end, a valve member operatively associated
said valve seat and including a bleed means for equaliz_
ing pressure on opposite sides of the valve element, op
erative means between one of said members and said
valve support means accessible solely through said
with said valve seat for sealing engagement thereagainst,
mouth for moving said valve support means and stop
a valve stem within said body extending ?rom- said valve
element towards said mouth to close the valve element
member toward the other open end of said body, retainer
against said valve seat, spring means between said valve
means reciprocable within said body,‘ said valve stem being 50 element and said spider member for urging said valve
slidably supported by said retainer means for relatively
element to an open position against said stop element,
free movement in a valve-closing direction and for limiting
said operative means moving said valve support means
retention in a valve-opening direct-ion, ?rst resilient bias-'_
and stop element away from said mouth to release the
ing means normally urging said retainer means and valve
valve element to the action of said spring means to
stem in a valve-closing direction, second resilient biasing
open it, said valve member including a valve stem slid~
means of lesser force than said ?rst biasing means nor
able in said central opening and having an axially ex
mally urging said valve’ member in‘a valve-opening direc
tion, said retainer being normally positioned by 'said ?rst
tending passage therethrough receiving said valve sup
port in slidable relationship.
biasing means to effect seating of said valve member
14. An excess ?ow check valve comprising a housing
member having a fluid flow passage therethrough and
terminating at one end in an internally threaded mouth
for the reception of a threaded pipe end therein, a valve
means toward said one end of the body to' release said
seat element in said passage having a valve seat thereon
valve stem for free slidable movement, and bleed port
facing towards the other end of said housing, a spider
means extending through said valve member for restricted
member in said passage between said mouth and valve
?uid ?ow into said valve body when said valve member‘ 65 seat having a’ central opening therethrough, a valve sup
against said valve seat, whereby said valve member‘ and
second biasing means'coope'rate to perform'ari excess
?ow valving action only upon shifting of said retainer
is in its closed position. '
'
'
’
e
port means extending through said central opening and
'11. An excess ?ow check valve comprising a housing
through said valve seat and having a stop element there
having a’ passage with an outwardly opening internally
on, a valve element slidably mounted on said valve sup
threaded mouth and a valve seat opening and facing in
port means for movement between said stop element and
wardly, spider means in "said passage, '11 valve support 70 said valve seat and including a bleed means for equaliz
means slidably carried by said spider means and extend
ing pressure on opposite sides of the valve element, op
ing through said valve seat a'nd'having a stop element
erative means‘ between one of said members and said
on the end thereof, a valve disc'means slidably mounted
valve support means accessible solely through said month
on said valve support means ahead of and engaged by
for moving said valve support means and stop element
said stop element and adapted to close‘ against said valve
towards said mouth to close the valve element against
3,095,899
9
said valve seat, spring means between said valve element
and said spider member for urging said valve element to
an open position against said stop element, said opera
tive means moving said valve support means and stop
element way from said mouth to release the valve element
to the action of said spring means to open it, said opera
tive means between one of the members and the valve
support comprising a spring stronger than said spring
means and being formed integrally with said valve sup
ort.
10
through said valve seat and having a stop element there
on, a valve element slidably mounted on said valve sup
port means for movement ‘between said stop element and
said valve ‘seat and including a ‘bleed'means for equalizing
pressure on opposite sides of the valve element, operative
means between one of said members and said valve sup
port means accessible solely through said mouth for mov
ing said valve support means and stop element towards
said mouth to close the valve element against said valve
10 seat, spring means directly engaging between said valve
P 15. An excess ?ow check valve comprising a housing
element and said spider member for urging said valve
member having a ?uid ?ow pass-age therethrough and
element to an open position against said stop element, and
terminating at one end in an internally threaded mouth
means interengaging said pipe end and said operative
for the reception of a threaded pipe end therein, a valve
means ‘for moving said valve support means and stop
seat element in said passage having a valve seat thereon 15 element away from said mouth to release the valve ele
facing towards the other end of said housing, a spider
ment to the action of said spring means to open it.
member in said passage between said mouth and valve
18. An excess ?ow check valve comprising a housing
seat having a central opening therethrough, a valve sup
member having a ?uid ?ow passage therethrough and
port means extending through said central opening and
terminating at one end in an internally threaded mouth
through said valve seat and having a stop element there
for the reception of a threaded pipe end therein, a valve
on, a valve element slidably mounted on said valve sup
seat element in said passage having a valve seat thereon
port means for movement between said stop element
facing towards the other ‘end of said housing, a spider
and said valve seat and including a bleed means for
ember in said passage between said mouth and valve seat
equalizing pressure on opposite sides of the valve ele
having a central opening ‘therethrough, a valve support
ment, operative means between one of said members 25 means extending through said central opening and through
and said valve support means accessible solely through
said valve seat and having a stop element thereon, a valve
said mouth for moving said valve support means and
element slidably mounted on saidvalve support means for
stop element towards said mouth to close the valve ele
movement between said stop element and said valve seat
ment against said valve seat, spring means between said
and including a bleed means for equalizing pressure on
valve element and said spider member for urging said 30 opposite sides of the valve element, operative means be
valve element to an open position against said stop ele
tween one of said members and said valve support means
ment, said operative means moving said valve support
means and stop element away from said mouth to release
the valve element to the action of said spring means to
open it, said valve support means including a stop means
engaging said spider member to limit opening movement
accessible solely through said mouth for moving said
valve support means and stop ‘element towards said mouth
to close the valve element against said valve seat, spring
means directly engaging between said valve element and
said spider member for urging said valve element to an
of said valve element in a direction away from said
open position against said stop element, and means inter
mouth.
engaging said pipe end and said operative means for mov
16. An excess ?ow check valve comprising a housing
ing said valve support means and stop element away from
member having a ?uid ?ow passage therethrough and 40 said mouth to release the valve element to the action of
terminating at one end in an internally threaded mouth
said spring means to open it, said operative means between
for the reception of a threaded pipe end therein, a valve
the spider member and valve support means comprising
seat element in said passage having a valve seat thereon
a spring and a spring portion directly engaging said valve
facing towards the other end of said housing, a spider
support means for urging said valve support means and
member in said passage between said mouth and valve
stop away from said mouth to permit the valve element
seat having a central opening therethrough, a valve sup
to open when the spring portion is depressed through said
port means extending through said central opening and
mouth through said interengaging means.
through said valve seat and having a stop element there-g
19. An excess ?ow check valve comprising a housing
on, a valve element slidably mounted on said valve sup
member having a ?uid ?ow passage therethrough and
port means for movement between said stop element and
terminating at one end in an internally threaded mouth
said valve seat and including a bleed means for equaliz
for the reception of a threaded pipe end therein, a valve
ing pressure on opposite sides of ‘the valve element, opera
seat element in said passage having a valve seat thereon
tive means between one of said members and said valve
facing towards the other end of said housing, a spider
support means accessible solely through said mouth for
member in said passage between said mouth and valve seat
moving said valve support means and stop element to 55 having a central opening therethrough, a valve support
wards said mouth to close the valve element against said
means extending through said central opening and‘through
valve seat, spring means between said valve element and
said valve seat and having a stop element thereon, a valve
said spider member for urging said valve element to an
element slidably mounted on said valve support means for
open position against said stop element, said operative
movement between said stop element and said valve seat
means moving said valve support means and stop ele
and including a bleed means for equalizing pressure on
ment away from said mouth to release the valve element
opposite sides of the valve element, operative means be
to the action of said spring means to open it, said op
tween one of said members and said valve support means
erating means, said valve seat, said spider member, and
accessible
solely through said mouth for moving said
said valve support means comprising a unitary assembly
inserted and removed through said mouth for actuation 65 valve support means and stop element towards said mouth
to close the valve element against said valve seat, spring
solely through said mouth.
means directly engaging between said valve element and
17. An excess ?ow ‘check valve comprising a housing
said spider member for urging said valve element to an
member having a ?uid ?ow passage therethrough and
open position against said stop element, and means inter
terminating at one end in an internally threaded mouth
for the reception of a threaded pipe end therein, a valve 70 engaging said pipe end and said operative means for
moving said valve support means and stop element away
seat element in said passage having a valve seat thereon
from said mouth to release the valve element to the action
facing towards the other end of said housing, a spider
of said spring means to open it, said operative means
member in said passage between ‘said mouth and valve
comprising a compression spring whose outer coils are
seat having a central opening therethrough, a valve sup
guided by the side walls of the internally threaded mouth,
port means extending through said central ‘opening and 75 and said interengaging means being carried by said com
3,095,899
12
11
pression spring {for engaging said valve support means to
ported by said retainer stem means‘for relatively free
establish a compression stress upon said spring for closing
said valve element against the effort of said spring means.
20. A lock-type excess flow valve comprising an open
ended hollow tubular body de?ning a chamber at oneend,
a ?ow communicating bore of relatively smaller cross
section at the other end, said body de?ning a valve seat
at the outlet opening of said here, a valve member opera
movement in a valve-closing direction and for limiting re
tention in a valve-opening ‘direction, guide means within
tive to seal against said valve seat, a retainer stem means
reciprocable within said body extending from said valve
member toward said chamber and slidable in said bore,
said body slidably supporting said retainer stem means,
?rst resilient biasing means normally urging said retainer
stem means and valve member in a valve-closing direction,
means for urging said valve member in a valve-opening
direction including a positive displacement element re
ceived within the other end of the tubular body to con
trol the ?rst resilient biasing means and a second resilient
biasing'means of lesser force than said ?rst biasing means,
said retainer stem means being normally positioned by
said ?rst biasing means to effect seating ‘of said valve
member against said valve seat, whereby said valve mem
tion, the valve member being slidably supported by said
retainer stem means for relatively free movement in a 15 ber and second biasing means cooperate to perform an
excess ?ow valving action only upon shifting of said re
valve closing direction and for limiting retention in a valve
ta-iner stern means toward said one end of the body to
opening direction, ?rst resilient biasing means normally
release said valve stem for free slidablle movement, and
urging said retainer means and retainer stem means in a
stop means provided by said retainer stem means for en
valve closing direction, and second resilient biasing means
gagement with said valve member to limit the extent of
of lesser force than said ?rst biasing means normally urg
valve member opening.
ing said valve member in a valve opening direction,
24. An excess ?ow check valve comprising a pipe ele
whereby said valve member and second biasing means
ment, an inlet opening, an outlet opening and having a
cooperate to perform an excess ?ow valving action only
valve seat therein facing said inlet opening, a member c0
upon shifting of said retainer stem means inwardly in
said bore to release said valve member for said slidable 25 axial with said valve seat within said pipe element, a valve
element slidably carried by said member and adapted to
movement.
close against said seat, means biasing said valve away
21. An excess flow check valve comprising a housing
from said seat, and means carried by said member engag
having a ?uid ?ow passage therethrough, a valve seat ele- .
ing said valve at alternate positions one for holding said
ment in said passage having ‘a valve seat spaced from
and facing away from the inlet end of said passage, a guide 30 valve in closed position against the biasing force of said
biasing means and the other for releasing said biasing
member in said passage between said valve seat and said
means and locating said valve at a predetermined excess
inlet end and having an opening therethrough, support
?ow responsive position selectively, said holding means in
means axially slidable on said guide member through said
cluding an element carried by said member adjustably
opening and extending through said opening and said valve
seat and movable coaxially with respect to said valve seat, 35 mounted in threaded engagement with said pipe element
within the con?nes of the pipe element and accessible
a stop element on said support means, a valve member
slidably carried by said support means between said stop , solely through said outlet opening of the pipe element for
means received in said chamber through said opened-end
for displacing said retainer means in valve opening direc
manipulation.
element and valve seat for movement into and out of
25. An excess ?ow check valve comprising a conduit
engagement with said valve seat, ?rst spring means direct
ly ‘between said guide member and valve member for bias— 40 means having an opening at one end and including a
spider member, a valve seat and a threaded opening in said
ing said valve member away from said seat to hold it
normally against said stop element, and spring means of
greater strength than the ?rst spring means 'for moving
said support means towards said inlet end to carry said
stop element and with it the valve member to its closed
position against the biasing force of said ?rst spring means.
conduit means coaxial with said valve seat for access
through said opening, valve support means reciprocably
supported in said conduit means coaxially with said valve
seat, a valve slidably carried by said element and adapted
to close against said valve seat, means including a spring
and stop means directly engaging the valve and spider
member and biasing said valve away from said valve seat
to a predetermined excess ?ow responsive position, and
a valve seat element in said passage having a valve seat ad
jacent to the other end of said passage, guide means in said 50 means threaded in said threaded opening for 1actuating
said valve support means for holding said valve in closed
passage spaced from said other end, means accessible
position against the biasing force of said spring means and
for manipulation through said open end and reciprocable
for releasing said valve support means for movement of
in said passage extending through said guide means for
the valve to said predetermined position.
relative free movements in avalve-closing direction and in
26. An excess ?ow check valve comprising a pipe hav
a valve opening direction, ‘a stop element on said recipro 55
ing a valve seat member therein, said member having a
cable means, a valve member carried ‘by said reciprocable
valve seat thereon, a valve carried by said member and
means for movement into and out of engagement'with said
adapted to close against said seat, spring means directly
valve seat, resilient means for moving said reciprocable
interengaging said valve and said member and biasing
means and valve member towards said one end to carry the
valve member into a closed position and resilient means of 60 said valve away from said seat, and holding means for
22. An excess ?ow check valve comprising a housing
having a ?uid flow passage therethrough open ‘at one end,
lesser strength within said housing directly engaging be
holding said valve in closed position against the biasing
tween said valve member and guide means released by
said moving means for biasing said reciprocable means
and said valve member away from said seat a distance
force of said spring means and for releasing said spring
means selectively, said holding means including a threaded
opening in said member and a stern member ‘threaded ad
limited ‘by said stop element whereby said valve member 65 jacent one end into said opening and slidably mounted in
said valve at its other end, a stop on one end of said stem
and resilient means cooperate to perform an excess flow
to limit movement of said valve away from said seat and
valving action when said valve member is disposed said
limited distance.
'
7'
V
'
a second stop ‘at the other end of said stem to limit move
ment ‘of said stern into said threaded opening, said ?rst
ended hollow tubular body providing a valve seat adjacent 70 stop adapted to engage the outer face of said valve and
force the same into engagement with said seat as said
its one end, a valve member operatively associated with
stem is turned in said threaded opening in valve closing
said valve seat for sealing engagement thereagainst, re;
direction and said second stop locating the ?rst stop for
tainer'stem means reciprocable'within said body'and ex
limiting opening movement of the valve at a predetermined
tending from said valve member ‘toward the other open
23. A lock-type excess ?ow valve comprising an open
end of said body, said valve member being slidably sup
excess ?owresponsive position.
3,095,899
13
14
27. An excess ?ow check valve comprising a housing
having ‘a passage with an outwardly opening mouth and
a valve seat opening and facing inwardly, spider means
in said passage, a valve support axially canied by said
spider means and extending through said valve seat land
having a stop element 'on the end thereof, a valve disc
slidably mounted on said valve support ahead of and
limited in its open movement by said stop element and
ciprocably supported in said passage and having its one
end portion adjacent said mouth extending through said
axial bore and the valve seat and the other end portion
provided with a stop thereon adjustably located a variable
distance from the valve seat adapted to engage said valve
member to close it against said valve seat, spring means
directly interengaging said valve member and said guide
means to dispose said valve in its open excess ?ow respon
adapted to close against said valve seat, ?rst means nor
sive position, means received in said passageway supported
mally urging the valve disc to follow said stop away from 10 on the walls of said housing including a stronger spring
said valve seat, and second means for releasably holding
Whose coils are guided thereby engaging said elongated
said valve in closed position against the force of the ?rst
retainer for moving same and the stop thereon in one
means including ‘a rotatable element on said support en
direction to close the valve member and the opposite direc
gaging said spider means and movable in one direction to
tion to permit the spring means to open the valve member,
carry the stop against the valve disc and drive the valve 15 bleed port means through said valve member for equaliz
disc to close against said valve seat, the outer ends of said
ing pressures on opposite sides of the valve member,
rotatable element and support being disposed in and ac
closure means for said bleed port means actuated by said
cessible for manipulation through said mouth from outside
stop means when said stop means moves said valve mem
of the housing.
ber to its closed position against said seat means.
28. For use with a tank for storing lique?ed gas under 20
31. An excess ?ow check valve comprising a housing
pressure, an excess ?ow check valve comprising a conduit
Whose walls de?ne a passage with an outwardly opening
internally threaded mouth, a valve seat in the passage
opening and facing away from said mouth, guide means
in said housing spaced from said seat and ‘having a cen
valve carried by said member and adapted to close against 25 tral opening, a valve member ioperatively associated with
said seat, ?rst means biasing said valve away ‘from said
said valve seat for closing engagement thereagainst and
seat, second means having a stop engaged by said valve
having a valve stem extending through said opening in
at alternate positions one for holding said valve in closed
slidable guided relationship and having an axial bore
position against the biasing force of said ?rst means and
therethrough, an elongated retainer reciprocably support
the other ‘for releasing said ?rst means and locating said
ed in said passage and having its ‘one end portion adja
valve at a predetermined excess ?ow responsive position
cent said mouth extending through said bore and said
selectively, said second means including an elongated ele
valve seat and the other end portion having 1a stop thereon
ment having a valve stop thereon threaded axially through
adjustably located a variable distance from the valve seat
said member and slidably connected 'to said valve.
and adapted to engage said valve member to close it,
29. For use with a tank for storing llique?ed petroleum, 35 spring means directly interengagi-ng said valve member
an excess ?ow check valve comprising a pipe adapted to
and said guide means for urging the valve member to an
be secured at one end in the wall of said tank and in ?uid
‘open position, stop means on said stem engaging said
communication with the bottom thereof, a valve seat
guide means to locate said valve at a predetermined ex
member in said pipe having a valve seat thereon, a valve
cess ?ow responsive open position, means received in said
carried by said member and adapted to close against said 40 passageway supported on the walls of said housing engag
seat, spring means biasing said valve away from said seat,
ing said elongated retainer for moving the stop thereon
and means accessible through the other end of said pipe
in one direction to close said valve member and in ‘the
for holding said valve in closed position against the bias
opposite direction to permit the valve member to open,
ing force of said ?rst means and for releasing said ?rst
bleed port means through ‘said valve member for equaliz
means selectively, said second means including a threaded 45 ing pressures on opposite sides of ‘the valve member,
opening in said member and a stem member threaded
closure means for said bleed port means actuated by
adjacent one end into said opening and slidably mounted
said stop means when said stop means moves said valve
in said valve at its other end, a ?rst stop at one end of
member to its closed position against said seat means.
said stem engaged by said valve in its open position to
adapted at one end to be secured to said tank in ?uid
communication, a valve seat member in said conduit hav
ing a valve seat thereon facing towards said ‘one end, a
limit axial movement of said valve on said stem in one
direction, and a second stop on the other end of said stem
References Cited in the ?le of this patent
UNITED STATES PATENTS
to limit movement of said stem through said threaded
opening in the same direction to locate the ?rst stop to
limit said valve to a predetermined excess ?ow responsive
position in its open position.
5 UK
30. An excess ?ow valve comprising a housing whose
walls define a passage with an outwardly opening inter
nally threaded mouth, a valve seat in the passage opening
and facing away from said mouth, guide means in said
housing spaced from said seat and having a central open 60
ing, a valve member operatively associated with said valve
seat for closing engagement thereagainst and having an
54,569
57,087
961,590
1,096,220
2,567,426
2,620,817
2,632,462
‘2,784,561
Mallerd _____________ __ May 8,
Clark _______________ __ Aug. 14,
England _____________ __ June 14,
Brooks _____________ __ May 12,
Ferrari _____________ __ Sept. 11,
Blaydes ______________ __ Dec. 9,
Selwyn _____________ __ Mar. 24,
Postlewait ___________ __ Mar. 12,
2,834,377
Bragg ______________ __ May 13, 1958
309,335
Germany ___________ __ Nov. 18, 1918
FOREIGN PATENTS
axially bored valve stem extending through said opening
in slidable guided relationship, an elongated retainer re
1866
1866
1910
1914
1951
1952
1953
1957
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