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Патент USA US2412479

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10, 3946.
2,412,479
O. J. SMITH
QUICK-ACTION _GAS VALVE
Filed oct. 15. 1942 _
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QUICK-ACTION GAS> VALVE
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ORIS J. SMITH
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`Patented Dect l0, 19h46“ ’ ~'
2,412,479
" UNITED 4sfl‘li'nss PATENT' oFFlcE
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2,412,479
_
QUICK-ACTION GAS VALVE
Oris J. Smith, Cleveland, Ohio, assìgnor to Air
Reduction Company, Incorporated, New York, .
N. Y., a corporation of New York
Application October 15, 1942, Serial No. 462,450
2 Claims. (Cl. 251-132)
1
2
,
My invention relates to a quick-action gas valve
which is designed particularly for use in connec
tion with compressed gas containers or cylinders
head engageable with said plunger to force it into
ilrm _valve closing position.
It is a 'further object of my invention to seal
this plunger in the apparatus by means of a
flexible metal diaphragm so that when the valve`
that are subject to temperature and barometric
pressure variations, such as are used in connec
tion with parachute escape devices employed in
military aviation, and usually at very high ele
vations, where both barometric pressure and temé
perature vary very sharply from the ground pres#
sures and temperatures. 'I'he valve mechanism
for controlling ñow of gas from high pressure
cylinder .containers may also be used in other
relations.
'
=
is opened no gas can escape except to the pas- `
~ sages connecting with the emergency mask struc~_
ture.
It is a further object of my invention to form
said lever of pivotally inter-connected parts so
that when the lever has been swung to valve
closing position the pivote-d .portion thereof can
be moved into a position close »to the valve stem
where it will be out of the way and not be liable
to be caught by the hands or clothing of the
` I
Airplane combat now occurs at elevations of
thirty thousand feet or even higher. If a plane
is hit and begins to fall or catches fire so that >it
is necessary for those in the plane to bail out and
hence to break contact with the supply of oxy
gen in the plane, an emergency supply in a cyl
aviator.
.
.
It is a further object of my invention to provide
spring means which is compressed by lever oper- 1
ation for automatically opening the valve when
inder preferably attached to the clothing' must 20 the lever is lifted to release the valve for opening
be used. It is essential, where the valve is used
and pressure of the gas is too low to eifect open
ing
‘in connection with cylinders containing emer
gency supply of oxygen, that the valve closures
It is e further object of my invention to provide `»
be of such a type that leaks will not develop due
a removable connection to the mask tube, includ
to the sharp changes in temperature and sur 25 ing a capillary limit port, which is secured to
rounding air pressure, It is also highly impor
vthe side ofthe valve stem and may be removed
tant that the pilot or other persons required to
for refilling the cylinder through the same pas- ` bail out be able to open the valve easily with one
sages by which gas ilows to the limit port.
hand, leaving the other hand free for other
The full objects and advantages of my inven
tasks such as applying the emergency mask, pull 30 tion will be made to appear in the appended
ing the rip cord, andthe like. Serious diillcul
specliìcation, and the novel features by means of
ties have been encountered because ordinary » -which the aforesaid important results are ob- «
valves heretofore employed contain packing and
= tained are particularly pointed out in the claims.
gaskets which react to changes in pressure and
In the drawings;
.
temperature so as to make it extremely difficult
Fig. 1 is a side elevation view of algas-con
to avoid the developmentA of leaks, and where
taining cylinder andthe Avalve mechanism at
tached thereto with parts broken away.
opening the valve requires use of both hands, one
to hold the cylinder from turning, while:` the
Fig. 2 is a longitudinal sectional elevation view
other turns the valve.
'
4
.
taken on line 2-2 of Fig. 5, showing the valve
It is a principal object of my invention, there 40 and valve operating.;r handle in closed position.
Fig. 3 is a top’plan view of the valve mecha
fore, to provide a quick-acting gas release valve
nism with the lever in down folded position.
,
which employs no packing or gaskets and seals
Fig. 4 is a view similar to Fig, 2, on a some
the passages by metal-to-’metal contact of the
same metals, which are not aüected by temper- '
h what smaller scale, showing the valve open.
ature or pressure changes and thus eliminate the 45
possibility oi’ leaks.
_y
It is a further object of my invention to provide
a valve structure with valve opening means which
Fig. 5 is a. transverse` sectional' view taken online
Fig.
5_5y
6 isofa Fight.
transverse sectional view on a some-l
what enlarged scale taken on> line 8-8 of Fig. 4.
As shown, the main valve- body comprises
can be instantly and easily operated with the use 50 a casting l0. This casting is provided with an
of one hand.
,
It is a further object of my invention to pro
vide a valve member embodying a plungerv having
a portion adapted to engage a projected valve
seat in commotion with a lever having a cam
enlarged internally"'threaded top opening Il>
having an annular bottom shoulder l2 from
' which extends a cylindrical opening I3 having a
bottom wall I4 provided with a protruded valve
seat i8. Extending through the center of said
2,412,479
3
4
valve seat I5 is a cylindrical opening I6 which
continues
across
a -transverse
chamber
I1
threaded part way along the opening as indicated
at I8. Below the transverse opening I1 is a`
continuation I9 of opening I6 which leads to a
sion into its ‘folded position as shown in Fig. 2
and in dotted lines in Fig. 4. The lever section
46 is normally held in its folded position with the
cylindrical opening 20 of considerably larger di
ameter and which is internally threaded along
wall 49 engaging the ledge 44 by a coil spring
5I pivoted at 52 to the body of lever 38 near
its under side and pivoted at 53 to the under side
of the pivoted lever extension 46. This spring,
part of its extent as indicated at 2|.
as clearly shown in Fig. 4, is connected to the
Mounted to ñt loosely in the cylindrical open
lever portions 38 and 46 so as to be inside' of the
ing I3 is a cylindrical plunger 22, Figs. 2 and 4, 10 axial center of pivot 48 and thus when free always
which is provided with a central externally
to operate to pull the lever into the folded posi
' threaded stud 23 with an annular shoulder 24
tion of Figs. 1 and 2 and the dotted line posi
surrounding this stud. Upon this shoulder 24
tion of Fig. 4.
and upon the annular shoulder I2 at the bot
The combined lever formed by the parts 38 and
tcm of the threaded opening II rests “a thin pli 15 46 is of substantial extent and makes available
able metal washer 25. A cap nut 26 is provided
an effective long lever for quick opening of the
with a. solid head 21 and an internally threaded
valve, thus requiring only moderate effort with
cylindrical bore 28, the cap nut being screwed on
one hand of the operator to effect that opening
the stud 23 to bring its bottom annular face 29
` with a single movement. Yet the extended lever
upon the flexible metal'washer 25 over the an 20 automatically folds itself so as to be positioned
nular shoulder 24, which is milled to a plane sur.
face to receive the plane face of flexible washer
25 and make a gas-tight seal therewith. A cylin- '
drical head block 30 is formed with a depending
normally out of the way where` it will not be
caught upon or pulled by hands or clothing of the
pilot operator, and also where it will be out of the
way while the cylinder is being filled with fresh
sleeve portion 3l enclosing a cylindrical chamber 25 gas.
32. The lower portion of the ~sleeve 3l is pro
When gas pressure is high, that alone will open
vided with an annular out-turned shoulder 33. A
the valve, after the lever system is swung to the
. v'sleeve nut 34 surrounds the'sleeve 3| and en
position of Fig. 4. Other means is provided to
f mes withits lower edge the shoulder 33. As
open the valve when pressure is low. For this
shown. the nut 34.18 externally threaded as in 30 a pin 54 extends through openings I8 and I9 and
dicated at 35, and it is screwed into the internal
engages a floating head 55 in the cylindrical
threads of opening II, thus clamping opposite
chamber 20. The head 55 is provided with an
faces of ñexible washer 25 between the faces of
annular shoulder 56 which is engaged by a com
bottom annular shoulder I2 and annular shoul
pression spring 51. The lower part of the spring
der 33. These faces will be milled smooth and
is held by engagement with the inner end 58 of
will provide a gas-tight union.
an externally threaded head section 59 of a
As shown, the plunger 22 is spaced from the
tube 6U. The threaded section 59 is screwed into
walls of cylindrical opening I3 and is held in
the internal threads 2I of the bottom part of
eilect suspended from or floating upon the ilexible
opening 28. Thus when the plunger 22 is moved
metal washer 25.
40 by the cam 4U, 4I on lever 38 to the valve closing
The cylindrical plunger 22 is provided with a
position of Fig. 2, the spring 51 is compressed
central plug 36 adapted to engage with its bottom
and the iiexible metal washer 25 slightly dis
surface the valve seat I5. This plug 36 is prefer
torted, as clearly shown in Fig. 2; and when the
ably formed of a softer metal than the valve seat
I5, but one in which the coefficients of expan
~ sion of these contacting metals will be substan
tialLv the same. The head block 30 is cut across
its top to form a transverse slot 31.
Mounted
valve levers are moved to the upper or opening
position, the spring 51, When gas pressure is
low, will instantly move the plunger 22 away
from the valve seat I5, with the result that gas
coming from the container 42 will pass through
tube 60, pass the valve seat I5 to chamber 6I,
Aupon s. pin 39 extending across the head cap 30 50 Fig. 4, and from there go to chamber 62 from
and forming a pivotal support for the lever 33.
which it will be conducted to the delivery tube 53
The lever 38 has formed thereon a nose 40 pro- .
through the following means:
' >in this slot is a cam lever 38 which is pivoted
vided with a cam face 4I which engages the solid
A casting 64 opens through central passageways
head 21 secured to plunger 22. When the lever
65 to chamber 62 when the externally threaded
33 is swung from the up position of Fig. 4 to a 55 extension 66 of said casting 64 is screwed into the
position at right angles thereto, the cam- face 4I
internally threaded cylindrical walls of chamber
will force the plunger 22 inwardly and cause
62, as best shown in Fig. 5. A second casting
ñrm engagement of valve block 36 with valve
61, Figs. 2 and 5, has an externally threaded
seat I5, as clearly shown in Fig. 2, at which
annular extension 68 adapted to be screwed into
time gas to be supplied from gas container 42 60 an internally threaded annular portion 69 of
will be 'effectively sealed from escape.
casting 64. A metal-to-metal seal is effected by
'I'he lever 38 is provided with a part cut away
contact of a sealing ring 10 with the annular
at its side at 43, and has a right-angled ledge 44
end 1I of casting 64. Likewise, a metal-to-metal
at the inner end of said cut-out portion 43, all
seal is eiîected between casting 64 and casting I0
as clearly shown in Figs. 1 and 3. Secured by 65 by contact of annular ñange 12 with the wall 13 of
, means of a rivet pivot 45 to lever 38 within cut-out
casting I0, as shown in Fig. 5. Thus these parts
portion 43 is a lever extension 46. This exten
are all united so as to produce a metal-against
sion is provided with a head 41 and two walls 48 '
metal seal, as is true of all joints in the whole
and 49 connected by a curved face 50, the walls 48
valve structure. A screen 83 is positioned in a
or 49 being adapted to~ engage the ledge 44 in 70 narrowed chamber 84, Figs. 2 and 5, to insure
one or the other of its positions. The Wall 48 is
that no particles of dust however small, reach
held in engagement with the ledge 44 when the
the capillary limit opening 18.
I
lever section is 'pulled into its extended posi
The casting 61 is provided with a nipple exten
tion as in Fig. 4, and the wall 43 is normally held
sion 14 to which the gas delivery hose 63 is
engaging the ledge 44 to bring the lever exten 75 attached. The nipple extension has therein a.
2,412,479
passageway it.. A capillary limit port tube lâ,
preierably of glass or other material with a sub
stantially negligible coeiiicient oi'expansion. is
secured in the casting 61 in gas-tight relation by
means of an annular body of cement Tl. The
bore ‘it through member 'i6 is shown very greatly
exaggerated in its dimensions for ease of inspec
tion. Preferably it will be slightly conical
throughout its length and in its smallest part
will be of a diameter closely approaching that
oi’ a capillary opening. 'I'he gas delivered is
engen which is one of the most free-flowing
gases known.
The limit port is of a size sucn
s `
d
tact, insuring against leaks which otherwise
might develop from the use of gaskets, packing ,
and the like.
A further advantage _is the provision of lirnit
port means connected with the valve structure` at
one side thereof and so it may be conveniently
removed to permit the cylinder ltank to be- readily
filled and refilled with the desired gas.
I claim:
1. Quick opening valve mechanism for control
ling gas delivery- comprising a valve block hav
ing a passageway therethrough surrounded at
one end by a valve seat, means adapting said
block to have connection of the passageway with
that when the valve is fully open suiiicient oxygen
gas will be supplied the breather without undue 15 a source of gas under pressure, a chamber
waste thereof, and the fact that it is formed of
formed in the block _extending to and about
material which has a low or practically `iegligible
said valve seat, a metal plunger in the cham
coeñiclent of expansion, insures that the size of
ber, a plug of softer metal in the plunger for
`the limit port will not be substantially aiiected
engaging the valve seat, a spring in the pas
by changes of temperature o_r air pressure.
sageway, a thrust pin having contact with the
The casting ttl and parts attached thereto are
plunger actuated by the spring which engages
readily removable at which time the cylinder
may be applied to a filling yoke of known con
struction. During iilling the lever assembly 38,
¿it will he in the position of Fig. 4, thus opening
the passageway t2 through the valve assemblage
and the tube tt therein into the cylinder 42.
When the cylinder is iilled with gas to a. desired`
pressure as shown by the gauge 80, the lever sys
tem is swung to the closing position of Fig. 2, and 30
the plunger and tends to force it away from
the valve seat, said plunger having a part extend
ing out of one end of the valve block, an elon
gated handle having cam engagement with said
extended end of the plunger for moving the same
to cause closure of the valve, and a metal dia
phragm sealed to the plunger and the valve block
for preventing escape of gas from the chamber,
all sealing means in the valve casing being ef
fected by metal to metal contact.
2. Quick opening valve mechanism for control
ling gas delivery, comprising a valve block hav
ing a passageway therethrough surrounded at
the assemblage can be withdrawn from the iill
ing yoke and casting 64 and attached parts re
assembled ior use of the apparatus. This fea
ture is a simple and eiîective one for the purpose
and secures against leak wastage during the fill 35
one end by a. valve seat, means adapting said
ing oœration. '
~
block to have connection of the passageway with
The gauge til has its shank 8| threaded into
a source of gas under pressure, a chamber formed
the transverse chamber I1 as shown in Fig. 6,
in the block extending to and about said valve
.there being an opening 82 extending through the
shank iii,`whereby the interior of the gauge, of 40 seat, a. metal plunger in the chamber adapted to
engage the valve seat, a spring in the passage
common construction, not shown, is at all times
way with means connecting it with the plunger `
subject to gas pressure Vof the cylinder vor tank
for tending to iorce the plunger away from the
te which the valve closure structure has been
valve
seat, said plunger having a part extending
applied. The aviator or other person employing
out of one end of the valve block, an elongated
the outñt for parachute escape purposes is thus 45 two-part
handle pivoted to and extending out
at all times able to be infomed ci the pressure
wardly
from
the end of the block when the plung
ci gas and corresponding availability of gas sup
er has been thrust by the spring into valve open
plv 7m the reserve tank.
ing position, a cam head on the lever engageable
The advantages of my invention will quite fully
with
extended part of the plunger and adapt
appear from the above description. A funda 50. ed to the
vforce it into valve closing position when the
mental and essential advantage is that a valve
lever is swung transversely, the outer part ci said
closure structure is provided which embodies a '
lever being broken at its point oi joinder with
lever system so constructed and related to other
the pivoted pant of the lever to be swung down
parts that the valve may be instantly opened with
to a position alongside the outer wall of the valve
a single movement of one hand only.
'
55 block when the lever has been swung to close the
.A further great advantage is found in the fact
valve.
that all joints are sealed by metal-to-metal con
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