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Патент USA US2122949

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July 5, 1938.DEVICE
E‘ PIQUEREZ
FOR AUTOMATICAL
‘
LY
OF‘ RESERVOIRS, TAN "
Filed July_
2 122,949
GONTROLLING
AN
, 195
THE FILLING , ‘
HE LIKE
2 Sheets-Sheet l
July 5, 1938.
E. PIQUEREZ
A 2,122,949
DEVICE FOR AUTOMATICALLY CONTROLLING THE FILLING
0F RESERVOIRS, TANKS, AND THE LIKE
Filed July 16, 1936
@3
2 Sheets-Sheet 2
2,122,949
Patented July 5, 1938
UNITED STATES
PATENT OFFICE
2,122,949
DEVICE FOR AUTOMATICALLY CONTROL
LING THE FILLING OF
TANKS, AND- THE LIKE
RESERVOIR/S,
Emile Piquerez, St. Cloud, France
Application July 16, 1936, Serial No. 91,012
In France July 25, 1935
(Cl. 226—120)
The present invention relates to a connecting suring the closing of the liquid inlet conduit, in
8 Claims.
device or union for use in the ?lling of receptacles, ' the event of excessive pressure arising in the re
reservoirs, tanks and the like, which is adapted to ceptacle being ?lled for any cause whatever. To
operate in such a manner as to automatically stop this end, the gas outlet opening or openings of U!
the inlet of the liquid which passes through it the receptacle to be ?lled, in communication with
the gas return conduit, are situated at a high level
when the liquid in the receptacle reaches a pre
determined level, the said connection either being or at least at the same level as that of the lower
opening of the passage leading to the suction
combined or not combined with means for inter
changing the atmospheres of the said receptacle
and that from which the liquid is‘ supplied.
Apparatus according to the invention is char
acterized by the feature that the liquid inlet con
duit‘ is provided with a closure member on valve
controlled .by the fall in pressure created in the
15 apparatus by a suction device operated by the
liquid ?ow. The fall in pressure created by this
device is applied to a chamber having at least
one movable wall or partition operatively con
nected with the closure member or valve, the said
29 chamber communicating with the interior of the
receptacle‘ to be ?lled, through a passage open at
the level to which .the‘receptacle is to be ?lled
with liquid, in such a manner that the lentryoi
the liquid into the said passage brings about an
increase of the suction effect in said chamber, up
to the‘ value necessary to cause the closing of the
liquid inlet by the closure member or valve.
The above mentioned passage is advantageously
provided with an appropriate member having a
'30 constricted opening to hinder the entry of the
liquid, in such a manner as to obtain the max?
imum fall in pressure in the chamber at the
moment when the liquid reaches the inlet‘opening
of the passage. To the same end, the latter
35 may be provided with a closure member or valve
controlled by the ?ow of the liquid, such, for ex
ample, as a ?oat valve.
In the preferred constructional forms of the
apparatus, the suction device operated by the
liquid flow comprises a horn-like tube, and a
particular characteristic of the invention is that
the lower opening-of the tube is arranged below
the inlet opening of the above mentioned passage,
in such a manner that a little before the liquid
45 has access to said passage, the outlet ori?ce of the
horn-like tube is submerged and the latter con
sequently operates with thebest ef?ciency.
In certain particular cases, when the connec
tion device or union is intended _for the transfer
50 of dangerous‘ volatile liquids, for- example, hy
drocarbons, it may comprise a gas outlet con
. duit for the exchange of the atmospheres be
tween the receptacle in process of being ?lled and
that in course of emptying. This modi?ed ar
55 rangement may also constitute safety means, en
chamber.
On the said gas return conduit is ar
ranged a pressure chamber opposite to the suction
chamber, that is to say, situated on the other
side of the movable control member for the liquid
0
feed pipe closing device.
In this case, obviously, the connection device
or union can be provided with a joint in leak
16
proof connection with the receptable to be ?lled
but when the connection device for union does
not comprise an atmosphere-exchanging arrange
ment, a leak-proof connection is unnecessary.
Thus the invention provides a further advantage
over known devices for limiting the replenishment
of receptacles and the like.
The movable wall or partition of the suction
chamber which, as > mentioned above may, in
certain cases, be common to the said suction 25
chamber and to a pressure chamber, may consist
of piston or, preferably a membrane or equiva
lent. The said movable wall or partition can be
attached directly to the closure member or valve,
but, preferably, it cooperates with a catch which 30'
normally holds the closure member or the valve
open against the action of a spring (which may
be previously loaded by hand) in such a manner
that the closing of said member or valve may be
35
instantaneous.
vOne simple and efficacious construction com
prises a pivoted lever having one end arranged
to be displaced by the piston, membrane or equiv
alent and having its opposite end pivoted to a
catch, against which a shoulder on the rod of 40
the closure member or_valve, is adapted to abut,
said catch being guided for movement in a direc
tion intersecting the axis of the said rod.
The annexed drawings show, by way of exam
ple, various constructional forms of the invention
diagrammatically and also one construction in
greater detail.
‘
Figure 1 shows one construction in diagram
matic elevation;
Figure 2 shows another construction in a sim
ilar manner;
'
‘Figure 3 shows, in diagrammatic elevation, the
addition to one of the above constructions of a
gas exchange conduit;
Figure 4 shows diagrammatically the combina
2..
2,122,949
tion of the apparatus shown in Fig. 1 with a gas
exchange conduit constituting a safety device;
Figure 5 is a vertical section of one practical
constructional form of an apparatus as shown
in Fig. 4; and
Figure 6 shows, in section, a lengthening mem
bercapable of being used on the apparatus shown
in Fig.
5.
‘
' .
,
'
'
.r
The movable wall consists, for example, of a
20 membrane which, on its inner face, is subjected to
the fall in pressure produced by the flow of liquid
into the tube, the chamber ‘I being connected to
the body 2 by a conduit 8. A spring 9, tends con
stantly to maintain the valve 4 open against the
25 action of the fall in pressure in the chamber 1,
said valve, moreover being screened normally
from the inlet pressure of the liquid by a de?ector
Ill. 0n its external'face, the membrane 6 is sub
jected to atmospheric pressure.
-
Asmall passage II descends from the chamber
1, the lower opening I2 of the passage ‘being
adapted to ?x the ?lling level of the liquid in the
receptacle R. The outlet opening Id» of the tube I
is situated below the level of the opening I2‘in
such a manner thatit is submerged during the
useful period of the operation. The positioning
of the openings I2 and I a with respect tothe re
ceptacle R is assumed'to. have been ?xed, for
example, by. a collar I3 which bears on a ?lling
tube {4 of the receptacle.-
.
It will be easilyunderstood that when the tube
functions, flow of air or gas according to the con
tentsof the receptacle R, will be produced in the
direction l2_-I I-—8_-2, and, consequently, that a
45 certain fall in pressure will occur in the chamber
‘I. The fall in pressure will increase when the
liquid has flowed into theopening I2. In order
that the increase in the fall in pressure may be
very appreciable and that its ?nal value may
conform to the object sought, a diaphragm I5
having a constricted opening I6 has been ar
ranged at the bottom of the tube II.v
‘
~ ‘In these conditions, whenthe ?lling level of the
liquid in the receptacle R is attained, the fall in
pressure produced in the chamber 1 causes the
displacement of the membrane 6 against the ac
tion of the spring 9, the closing of the valve 4
and, consequently, the stoppage of ,the ?ow of
liquid; into the nozzle 2 being brought about at
the same time.
The said conduit terminates at its
piping leading to the receptacle being emptied so
phere between the two receptacles.
In Fig. 1 which shows a simple construction of
replenishmentdimiting union or connection, nu
meral I designates a downwardly enlarging or
horn-like tube and 2 an injector nozzle cooper
ating with said tube and connected to a small
15 liquid inlet conduit 3. A valve 4 is arranged inv
the conduit 3 and is provided with a rod 5 which
is attached at its opposite end to the movable
80
of ?lling.
upper end in a small tube 22 which can receive
that there may thus be an exchange _§of atmos
Referring to the drawings:'—
wall 6 of a chamber ‘I.
- The apparatus shown in Fig. 3 is formed by
connecting an apparatus such as shown in Fig. 1
or Fig. 2 with a conduit H for the evacuation of
the atmosphere in the receptacle R in the course
-
The construction shown in Fig. 2 is distin
guished solely from the preceding construction in
that the diaphragm‘ I4 with its calibrated ori?ce
I 6 is replaced-by a valve I‘! provided on a ?oat I8,
which is arranged in a chamber I9 provided on
the tube-I I. As soon asthe liquid closes the open
ing I2, the sharp increase in the fallin pressure
in the chamber ,1 causes the liquid to rise in the
chamber I9, whereby the valve I‘! is moved on its
seat 26. As the small tube II is thus completely
closed, the fall in pressure in the chamber 'Ils
high, so that the valve :4 is caused tomove to'its
seat.v As the operation is very rapid, the ?lling
level of the liquid in this case can be considered
as beingin the plane of the opening I2. ‘
'
‘
At its lower end, the mouth 23 of the conduit 10
2| is at a higher level than that of opening I6
which marks the ?lling level of liquid in the re
ceptacleR.
V
In the modi?cation shown in Figure 4, the
membrane 6 forms part of the wall of the conduit 15
2| which, unlike the chamber 7, forms a pressure
chamber. The connection of the apparatus with
the receptacle R between I3 and M is neces
sarily, leak-proof and is furnished with a joint 24.
Assuming that the replenishment-limiting de 20
vice previously described may vnot have func
tioned, for example, because the rate of flow of
the liquid has been insu?icient'to produce a fall
in pressure capable of closing the valve 4, the
liquid will rise in the conduit 2| and will act on 25
the membrane inthe direction to close the valve 4.
Again assuming that the apparatus has not
functioned, if the piping used for exchange of
atmosphere between the two receptacles is closed,
then the pressure of the gas in the conduit III will 30
act to displace the membrane, in the direction
to close the valve.
'
In any case, the pressure of the gases in the
reservoir will thus not be able to attain value
dangerous for the reservoir.
35
The construction shown in Fig. 5, arranged,
for example, for use in the ?lling of petrol tanks
of aeroplanes or other vehicles, comprises a cas
ing5I provided with an inlet tube 52 in which a
deflector‘53 serves as a suppora'for a valve 54
during the operation of- the apparatus. The tube
52 communicates- with an injection nozzle 55
communicating with the tube 56. The upper end
of thevtube 56 opens into a chamber 51 in which
a membrane 53 isarranged and is held in posi
tion by a cap 59 provided with a handle 60 for
the transport of the apparatus. A chamber 6| is
formed in the cap 59 opposite to the chamber 51
on the other side of the membrane 58, the cham
ber
communicating through , channels
(not 50
shown on the drawings) with the internal cham
ber 62 in the tubular foot 63 of the apparatus
which has large openings 64 providing communi
cation with the atmosphere of the reservoir which
is to be ?lled. The gases from the reservoir can 65
thus reach the chamber 6|, ‘which is provided
with a small outlet branch 65, whereby it may
be connected to the reservoir in course of empty
ing for the exchange of atmospheres between the
two reservoirs. . The tubular foot 63 has a joint 60
66 consisting, .for example, of a ring of rubber
arranged to be applied on the top of the ?lling
tube of the reservoir so as to ful?ll the function
of the joint 24 shown‘in Fig.4.
'
_ .
The chamber 57 below the membrane 58 also 65
communicates with the atmosphere of the reser
voir during the ?lling of the latter by means of
a small: passage-6'! formed in they casing of’ the
tube 56 and corresponding to the conduit II
shown in Figs. 1 to 4.
'
I‘
'
a
70
The lower opening 61av of the passageB‘I, which
in practice ?xes the‘?lling level, is situated below
the upper‘edge of the openings 64,so as to avoid
an excess of pressure in the reservoir.
The passage 6'! may be provided at any point II
3
2,122,949
whatever in its height with a plug or diaphragm
having a calibrated opening to impede the ?ow of
the liquid and thus to bring about an increase
of the fall in pressure in the chamber 51.
It will be easily seen thatv during the ?lling of
the reservoir, the tube, creates in the chamber
51 a fall of pressure which is made up in propor
tion by the gases in the reservoir being carried
up through the small passage 61. As soon as the
lower opening in the ‘latter is closed by the liquid,
which will flow in the passage with greater dif
?culty than the gases, the fall of pressure in
the chamber .5‘! .will increase and will be able to
displace the membrane. In order to obtain the
closing of the'va'lve 54, in consequence of the
displacement of the membrane, the following ar
rangement ‘can be advantageously used.
, The valve 54 is subjected constantly to the
action of a spring ‘I0, arranged in the deflector
‘53, which tends to force it on its seat ‘H. The
seating of the valve is, however, normally pre
vented by a small catch 12 against which the tail
13 of the valve rod is adapted to abut. The catch
is provided with a roller 14, which‘bears on a
25 rolling track 15 perpendicular'to the direction
of the axis of the valve rod. At its upper‘ end,
the catch" is pivoted at 16 to a lever 1‘! hinged
at 18 vand carrying beyond the latter a roller
19, which is adapted to bear against the bottom
30 face of a central member 80 on the membrane
58 under the action of a spring 8].
During ?lling, the membrane is lifted by the
roller 19, the lever 11 is inclined and the lower
end of the catch 12 is neatly engaged behind the
35 adjacent face of the tail 13 of the valve rod.
‘ When the ?lling level of the liquid is reached
the fall ofpressure' in the ‘chamber 51 causes
the lowering of the membrane 58 and, conse
quently, the ascent of the catch 12 and roller 14.
As the valve 54 is now freed, it is forced sharply
on its seat under the ‘action of the spring ‘I0. It
will be noted that as soon as the valve is disen
gaged from the deflector 53, it is assisted in its
closing movement by the pressure of current of
45 liquid.
When the valve 54 is closed, the fall in pres
sure in the chamber 51 is stopped and spring 8|
causes the membrane 58 to be lifted again and
the catch 12 to be lowered, so that it will engage
in
an annular groove‘ 82 in‘the valve rod.
50
In order that the apparatus may be able to
function again after having been removed from
the reservoir, it is necessary to re-set it; To
this end, there is used, for example, a push rod
83, connected to anvexternal knob 84 which, un
der the ~action of aspring 85, occupies normally
a withdrawn position.
Any suitable means is
provided to ensure tightness against leakage be
tween the member 86 and the push rod 83. The
60 resistance which will be opposed by a stu?ing
box, for example, is not to be entertained, since
the push rod will be actuated by hand._ ‘ If, on the
contrary, the valve rod itself had been prolonged,
the means for ensuring tightness would have been
incompatible with the liberty of ‘its movements.
65 In
the arrangement adopted, assuming that there
is a slight escape of liquid around the valve rod
from the chamber 52 into the chamber 51, it will
be sucked back by the tube 56.
The actuation of the push rod 83 causes the
forward movement of the tail 13 of the valve
54 which, through the inclined face 13a on the
valve rod, will act to lift the catch 12, the lower
end of which is also inclined in such a manner
that the catch will be able to pass from the
other side of the swelling of the tail 13 and
retake the. position shown in Fig. 5. Thereafter,
the push rod can be moved in the reverse direc
tion.
If, for any reason, the operation of the re
plenishment-limiting device which hasjust been
described does not take place and if the liquid
continues to rise in the reservoir until the ports
64 have been closed, then the pressure of the
atmosphere of the reservoir would be raised and 10
the liquid which is rising in the chambers 62
and BI would act to force the membrane to de
?ect downwardly by means of the pressure act
ing on its upper face before the pressure in the
reservoir had reached a dangerous value.
v15
Finally, it will be advantageous, as shown on
the drawings, to provide the membrane with a
guide 8'? leading to the exterior of the appara
tus, so that in case of lockingfor wedging in the
interior of the apparatus, the valve can always 20
be closed by pushing on the rod 81.
The lengthening member shown in Fig. 6 per
mits the apparatus to be applied to reservoirs
having long ?lling tubes. The central tube 88
of the lengthening member is screwed on to the 25
end of the tube 56, whilst the member 89 which
surrounds it forms'a joint with the ring 90 of
the said tube. The conduit 6'50, therefore com
municates with the space between the two mem—,
hers-88 and B9. The ?lling level of the liquid 30
isthen appreciably that of the lower inlet of
the member 89.
The latter is centered on the
member 88 for example, by ribs 85a and by a
six-sided mouth 88a which permits the screw
ing of the member 88 on to the tube 56.
3%
It follows that the invention is not limited to
the constructional form‘described and shown of
which it comprises all variations.
I claim:
lnLevel limiting ‘connection for ?lling recep
tacles with liquid, comprising, a casing having
a liquid conduit comprising an inlet tube, a
downwardly enlarging outlet tube, and an in
jector nozzle connecting said inlet tube with said
outlet tube, a valve for closing said conduit, said
casing forming a chamber having a movable wall
comprising a diaphragm, said casing forming an
inclined annular air conduit of small cross sec
tion communicating with said liquid conduit be
tween the. injector nozzle and outlet tube there
of, and with said chamber, the lower end of the
outlet tube emptying freely into the receptacle
being ?lled, said casing having an air passage
having its upper end opening into said air con
duit and its lower end opening to the recepta
cle being ?lled, said lower opening being sit
uated at a higher level than the discharge end
of said liquid outlet tube, and means mechani
cally connecting said diaphragm with'the valve
to close said valve through the effect of the re~ 60
duction of pressure produced in the chamber
when the liquid in the receptacle closes the lower
opening of said air passage.
'
2. Level limiting connection for ?lling vessels
with liquid, comprising a casing having a liquid 65
inlet conduit, 8. stop valve for said conduit, said
valve being disposed to close by movement in
the same direction as the liquid flow, a de?ector
behind said valve to shield it from the pressure
of the ?owing liquid, a chamber, having a mov 70
able wall, a rod directly connecting said wall to
said stop valve so that movement of said wall,
responsive to a pressure reduction, causes a
movement of said stop valve towards its seat,
and thus permit the liquid to add its action for
75
4
2,122,949
closing the valve, a blast tube in .said liquid con
duit to create a suction. in said chamber, said
casing being formed .with a passage connecting
said chamber with the atmosphere of the ,ves;
sel being, ?lled, said passage having an ‘ori?ce
atits lower end, said ori?ce having means for
restricting the flow of the liquid into said pas
sage and ‘a, spring for normally holding said
movable wall and said stop valve in the open
when'the level in the receptacle being ?lled
reaches a‘ predetermined level, and means for
applying the pressure of the receptacle being ?lled
3. Level limiting connection for ?lling vessels
with liquid, comprising a frame having a liquid
to theother ‘of said surfaces.
1 6.: Level limiting connection for ?lling vessels
with liquid,>comprising a frame having a liquid
inlet conduit, 2. stop' valve for said conduit, a
chamber having a movable wall, means for con
trollingsaid Valve from said movable wall, a blast
tube in said liquid conduit to create a suction in 10
said chamber, a conduit connecting said chamber
with the atmosphere of the vessel being ?lled
inlet conduit, a shut-oil valve in said liquid con
duit, a spring pressing on said valve in the clos
15 ing direction, a catch for holding said valve open
level, and asecond chamber formed on the other
side of said movable wall of the ?rst-mentioned 15
10 position.
against the action of said spring, a pressure
reduction chamber having a movable wall con
sisting of a diaphragm, a lever, a medial hinge
for said lever, one end of said lever being ar
20 ranged in contact with the‘ center of said dia
phragm, and the other end being hinged on said
catch so that the latter moves backwards and
releases said valve when said diaphragm effects
an inward movement, a spring opposing the in
25 ward movement of said diaphragm and holding
said catch engaged, a blast tube arranged in said
liquid inlet conduit and sucking in the pressure
reducticn chamber, and a conduit of small cross
section connecting said pressure-reduction cham
through a‘lower ori?ce determining the ?lling
chamber, said second chamber communicating on
the one hand with the atmosphere of the vessel,
and on the other hand with an ori?ce to be con
nected with the atmosphere of the vessel supply
ing. the liquid.
"
20
'7. Level limiting connection for ?lling vessels
with-liquid, comprising a frame having a liquid
inlet conduit, a stop valve for said conduit, a
chamber having ‘a movable wall and means for
controlling'the closing of said valve from said 2.5
movable wall,’a blast tube in said liquid conduit,
and adapted tov produce a suction in said chamber,
a conduit for connecting said chamber with the
atmosphere of the‘vessel being ?lled, said conduit
30 ber with the atmosphere of the ' vessel being , opening into the vessel through a lower ori?ce 30
?lled, the lower ori?ce of said small conduit de
termining the ?lling level, and means for bring
ing said valve into the position in which it is
engaged by said catch.
35
~
4. Level limiting connection for ?lling vessels
with liquid, comprising a frame having a liquid
inlet conduit, a shut-off valve in said liquid con
duit, a spring pressing on said valve in the clos
ing direction, a catch for holding said valve open
40 against the action of said spring, a pressure-re
duction chamber having a movable wall consist
ing of a diaphragm, a lever, a medial hinge for
said lever, one end of said lever being arranged
in contact with the center of said diaphragm and
45 the other end being hinged on said catch so that
the latter moves backwards and releases said
valve when said diaphragm effects an inward
movement, a spring opposing the inward move
ment, of said diaphragm and holding said catch
50 engaged, a blast tube arranged in said liquid‘ in
let conduit and sucking from the pressure-reduc
tion chamber, and a conduit of small cross-sec
tion connecting said chamber with the atmos
' phere of the vessel being ?lled, the lower ori?ce
55 of said conduit determining the ?lling level, a
plunger sliding oppositely to said valve, a retract
ing spring for said plunger, and another plunger
outwardly ?xed to the center of said diaphragm
to enable said catch to be disengaged at will.
5. Level limiting connection for ?lling vessels
60
with liquid comprising a frame having a liquid
inlet conduit, a stop valve for said conduit, means,
having two oppositely directed pressure respon
sive surfaces, for controlling said valve, ‘means for '
65 generating a fall of pressure by the flow of liquid
in said conduit and applying said reduced pres
sure to one of said pressure responsive surfaces
which determines the ?lling level, a second cham
her on the opposite side of the movable‘ wall from
the ?rst chamber, said second chamber communi
cating, on the one hand with the atmosphere of
the vessel through an ori?ce located at a level at 35
least as high as the level of the lower ori?ce of the
conduit leading from said ?rst chamber, and on
the other hand with an ori?ce adapted to be con
nected with the atmosphere of the cistern supply
ing the liquid.
'
‘
8. Level limiting connection for ?lling vessels
with liquid, comprising a frame having a liquid
inlet conduit, a shut-01f valve in said liquid con
duit, a spring pressing on'said valve in the closing
direction, a catch for holding said valve open
againstjthe' action of said spring, a chamber hav
ing a'movable Wall consisting of a diaphragm, a
lever, a medial hinge 'for said'lever, one end of
said lever being ‘arranged in contact with the
center of said vdiaphragm and the other end being 50
hinged on said catch sothat the latter moves
backwards and releases said valve when said dia
phragin e?ects‘ an inward movement, a spring
opposing the return movement of the diaphragm,
a blast tube arranged in said liquid inlet conduit
of small cross-section connecting said chamber
withthe atmosphere‘of the vessel being ?lled, the
lower ori?ce of said conduit determining the ?ll
ing level, and a second‘ chamber formed on the
other side, of, the movable Wall of the ?rst cham 60
ber,_ said second‘ chamber communicating with
the atmosphere of, the vessel being ?lled, and
means for hermetically- sealing the connection
with the vessel.
.
, ,
'
EMILE
PIQUEREZ.
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