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Патент USA US2405439

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Aug, 6', 1946., .
I. LUBEQCK ET AL
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2945943
EXPLOSIVE OPERATED VALVE
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‘Filed Nov. 6, 1942
jgj.
2 Sheets-Sheet l
All. 6,‘ 1946.
l, LUBBOCK ET AL
Z?-AQ
EXPLOSIVE OPERATEDVALVE
Filed NOV. 6, 1942
2 Sheets-Sheet 2
Patented Aug. 6, 1946
2,405,439
"UNITED ' STATES Parent‘ “OFFICE
~ 2,405,439
EXPLOSIVE OPERATED VALVE
Isaac Lubbock, Geo?rey Joseph Gollin, Allan
Lindsay, and Harold James Poole, London, Eng
land; said Lubbock, Gollin, and Lindsay assign
ors to The Asiatic Petroleum Company, Limited,‘ .
London, England
Application ‘November 6, 1942, Serial ‘No. 464,832
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In Great Britain November 7, 1941
7 Claims.
1
(Cl. 137-139)
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' According to this invention, a valve which will
the hole and does not project laterally from the
open practically instantaneously is provided by
employing an explosive charge to create pressure
outer wall of the anvil.
above a piston linked with or forming part of a
ed to move over the outer wall of the anvil and
is formed with a recessed portion l8 which, as
valve member preferably of the poppet type.
The valve is adapted to remain open after it has
moved to the open position by providing an auto
matic retaining device.
_
Various features of the invention embodied in
carrying it into practice will be hereinafter de 10
scribed and claimed.
I
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The invention is illustrated by way of examples
in the accompanying'drawings, of which Figure 1
is a sectional elevation of the valve in the closed
position; Figure 2 is a detail in the same view
showing the valve in the open position; and Fig
ure 3 shows a modi?ed form of device for auto
matically retaining the valve in the open posi
tion.
Referring to the drawings, I represents the ex
plosive charge, which is of the solid type and
which is operated electrically by a usual form
of resistance bridge, but it will be understood that
it might also be operated through a percussion
or friction cap. The'explosive charge is shown
as being introduced as a cartridge ?tted into the
head of the valve body above the movable valve
member which comprises a stem 2 carrying a
piston 3 at the top end and a poppet 4 toward
its lower end. The piston slides in the valve body
5 which is suitably machined to provide a bear
ing for the piston and a seating for the poppet.
It will be understood that the principle of con
struction is unaltered if the valve is horizontal,
or inclined, or operated upwards.
The port 6 is provided at the bottom for the
inlet of ?uid whilst a transverse port 1 is pro
vided for the outlet of ?uid when the valve is
opened. It will be seen from Figure 2 that these
ports are in communication with each other
when the valve is open.
The means for retaining the movable valve
member in the open‘position after the explosive
charge has been ?red and has driven down the
piston comprises, as shown in Figure 1, a lock
ing device operated by pressure transmitted by
solid material subjected to a blow from a ham
mer carried by the valve member. This ham
1,
A skirt I‘! attached to the valve stem, is adapt
shown in Figure 2, is opposite to the bolts or
snugs when the valve is opened and the soft
metal in the anvil has been struck by the ham
mer.
;
The pressure engendered in the soft metal
when it is so struck, is transmitted to the bolts
or snugs, ‘causing them to emerge from, their
15
holes in the outer wall of the anvil and to enterv
into the recessed portion of the skirt carried by
the'valve
stem.
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It will be seen that the recessed portion in the
skirt is provided to form on the end of the] skirt
a ?ange l9 which is a reasonably close'?t over
the outerv wall of the anvil, the skirt proper being
20 of such internal diameter as to allow the bolt or
snug to be moved an appreciable distance beyond
the Wall of the anvil and to lie partly within the
wall of the anvil and partly outside when caused
to emerge by the pressure transmitted from, the
25 soft metal.
v The valve is particularly suitable for use in‘
connection with the passage of gas under very
high pressure, for example for releasing high
pressure gas from a storage cylinder for the pur-_
30 pose of impelling combustion ingredients to noz
zles in a combustion chamber. An example of
this is in'connection with jet propulsion appa
ratus where inert gas at high pressure may be
used to drive liquid fuel and liquid oxidant to
a burning nozzle in the combustion chamber.
When the valve is employed with ?uid at very
high pressure it is important that no leakage
should pass the valve seat whilst the valve is
nominally considered closed. Accordingly there
is shown in the drawings a shearing plate or disc
[2 which is made for example of aluminium and
which is sheared by the valve member on its
opening movement. In Figure 2 this disc is
shown to have been sheared.
In operation, when the explosive charge has
been ?red the piston on the valve stem is driven
downwardly and uncovers a pressure relief vent
H. The shearing disc is ruptured, and the valve
mer, which is indicated by the reference numeral 50 stem moves at a high velocity until its hammer
enters the soft metal in the anvil. By this time
l5, strikes a body of soft metal l3 contained in
the ?ange on the skirt has moved beyond the
the steel cylindrical anvil M. The cylindrical
holes in the outer wall of the anvil in which the
wall of the anvil I4 is pierced with holes in each
bolts or snugs are situated, so that when the
of which is free to slide a bolt or snug 16 which,
hammer has entered the soft metal in the anvil
as shown in Figure 1, is normally contained in 65 and has engendered a high pressure therein, the
2,405,439
3
bolts or snugs are extruded until they come up
against the wall of the skirt proper as shown in
Figure 2. The valve stem under the in?uence
of the high pressure gas would tend to move back
towards the closed position, but the internal
?ange on the skirt comes up against the ex
, truded steel bolts or snugs which prevents fur
ther movement of the valve towards the closed
position.
In the original ?lling of the anvil with soft
metal a sleeve may be provided to slide over the
outside of the anvil so that the ends of the bolts
or snugs can be held flush with the outside of
4
means, said valve carrying a part which will
strike said body of metal when the valve opens.
3. An explosive operated valve comprising an
anvil containing soft metal, a detent located in
a transverse hole in said anvil communicating
with the soft metal, a hammer carried by the
valve which is adapted to strike the soft metal
when the valve opens, and a part carried by the
valve and adapted to present a recess opposite to
the detent after the soft metal has been struck.
4. An explosive operated valve as claimed inv
claim 3, in which the said part carried by the
valve is invthe form of a skirt moving about the
outside of the anvil when the valve is opening.
the anvil casing whilst it is being ‘?lled with
5. An explosive operated valve as claimed in
molten soft metal. The inner ends of the bolts 15
claim 3,.in which the said part carried by the
or snugs may be curved or otherwise shaped to
When the metal
valve is in the form of a skirt provided with a
?ange which moves about the outside of the
has cooled the snugs are held in this position by
anvil to a vposition beyond the detent when the
enable the soft metal, when set, to gain a posi- .
tive hold on the bolts or snugs.
the adhesion of the soft metal, and one can then 20 valvehas opened, so that when the valve tends
to close the'detent has been extruded to a recess
either dispose of the sleeve or arrange for it to
above the flange whereby the valve is prevented
be pushed to a position beyond the bolt or snug
holes by the downward movement of the ?anged
skirt carried by the valve stem. Such a sleeve
is shown at 20 in Figure 1.
In the modi?ed form of automatic valve retain
from closing.
ing means shown in Figure 3, spring controlled
the anvil when the valve is opening, a sleeve be
ing ?tted around the anvil opposite to the detent
and being adapted to be moved away from that
position by the skirt carried by the valve.
snugs are provided which operate directly upon
the valve stem. Thusthe snug 8 urged by the
spring l0‘ normally bears against the part 2| of
the piston but when the valve has opened the
snug comes opposite to the recessed portion 9 in
the piston and aceordingly'mo'ves into that re
cess under the force of the spring. When the
snug has ‘entered the recessed portion it is clear 35
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6. An explosive operated valve as claimed in
claim 3, in which the said part carried by the
valve is in the form of a skirt which moves about
7. An explosive operated valve of the poppet
type comprising a valve body having a valve seat,
a ?uid inlet to'a space below the seat, and a
?uid outlet'communicating with a space above
the seat, a valve cooperating with the seat, an
operating piston for'the valve subjected to the
explosive force, a shearable sealingmember form
ing a seal between the inlet and outlet passages
What we claim is:
.
and adapted to be ruptured when the valve is
1. An explosive operated valve comprising de
tent means adapted when operated to engage a 40 moved to open position by the explosive force,
detent means adapted to engage and hold the
part of the valve, and a body of solid material
valve open, a deformable body adapted when de
adapted when struck to flow and operate said
formed to operate said detent means, and means
detent means, and means operating when the
engaging and deforming said body when the valve
valve opens to strike said body of solid mate
that the valve is prevented from returning to the
closedposition.
rial.
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2. An explosive operated valve comprising de
tent means adapted when operated to engage a
part of the valve, and a body of soft metal adapt
ed when struck to flow and operate said detent
opens.
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ISAAC LUBBOCK.
GEOFFREY JOSEPH GOLLIN.
ALLAN LINDSAY.
HAROLD. JAMES POOLE.
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