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Патент USA US2403436

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July 9, 1946.
Filed Sept. 50, 1941
2 Sheets-Sheet l
‘ W. E z .
Patentedjuiy 9, -.
Henry Ernest Heigls, West Orange, N. J ., assignor
to Specialties Development Corporation, Bloom
?eld, N. .L, a corporation of New Jersey
’_.Application September'30, ‘1941, Serial No.,4l2,928
- 4 Claims.
(Cl. 137-695)
The present invention has reference to an ap-.
paratus for use with pneumatic and analogous
devices that are to be in?ated?or charged with a
?uid pressure medium to a predetermined degree
of pressure, and which is designed‘ to prevent the
establishment of excessive pressure within such
devices when in?ation or charging is taking place.
an improved in?ating valve for pneumatic de
~ vices of the type described. ~
It is a further object of the invention to pro
, vide an in?ating valve which permits the in
flation of low pressure pneumatic devices from
high pressure sources.
charging valve to be used with containers or en-_
More particularly, it is an object to provide
an inflation, valve which has~.a‘seat-type vent
valve for the prevention of ‘pressures within the
velopes, rigid or otherwise. _
in?ated device beyond a given safe. value. ,
More speci?cally, this invention relates to a
The invention, in this instance, will be described
in connection with a so-called life-raft for air
craft; it will be understood, however, that this
is by way of illustration ‘only, since the device is
equally well adaptable to any other container
having a limited pressure capacity, for example,
an airplane fuel tank which'is to be evacuated
and used for ?otation purposes, as suggested in
It‘is another object to provide a valve as re
ferred to, in which the vent valve is ordinarily
held securely seated by a force larger than that .
- at which it is adapted to vent the pressure me->
dium, receiving device during charging.
It is a still further-“object to provide in an in
. flation valve as indicated, a vent valve which is
automatically made operative during inflation,
and which is otherwise held securely seated un
Letters Patent of the United States No. 2,200,922.
Life-rafts, adduced here for illustration, that 20 der non-in?ation conditions.
These and other objects not specifically enu
, is, of the type used on aircraft for emergency
I landings on water, ordinarily comprise a rub-~
berized or rubber fabric envelope forming one or >
merated above, will be apparent when described
in greater detail in connection with the ac
companying drawings, which form a part of the
more compartments which, when the use of the
life-raft is desired, are given a charge'of-com 25 specification, in which similar characters of ref
erence indicate corresponding parts in all the
pressed air or high pressure gas. Since such
fabrics are not very pressure resistive, their safe -
views, and wherein:
operating pressure being in the neighborhood of
. Figure 12‘ s a top plan view of a life-boat or raft.
embodying the present invention and showing
three pounds per square inch, more or less; and
the source of pressure ?uid from which such 30 the manner of assembly ofthe pressure medium
source and the in?ation control device.
rafts are ‘usually charged, in the case of com
Figure 2 is a longitudinal cross-sectional view
pressed air, delivers at a pressure of one-hundred
of a portion of the life-boat taken on the line
pounds per square inch; and in the‘ case of a
2-2 of Figure ;l. viewed in the direction of. the
compressed gas, such as carbon dioxide, even very
much higher; it becomes necessary and desirable 35 arrows, and showing an upper and a lower in
?atable compartment.
to limit the pressure within said pneumatic com
partments to a maximum safe value as stated
Figure 3 is an elevational view of a section of
above. ‘It would seem, that ordinary vent valves
the in?ating device shown in Figure 1, taken on
would answer the purpose of such a, contingency;
the line 3—3 and viewed in the direction of‘ the
However, it has been found that vent valves de-' 40 arrows, as indicated in Figure 4.
' - _
signed to operate under suchlow pressures as
Figure 4 is an enlarged top plan of two in?at
would prevent the raft from bursting, are seated
ing devices, applied to the two compartments of
so lightly as to be a source of continued leakage
the raft of Figure 1.
from the raft. I A light-seating vent valve of this
type, would also very frequently be unable to 45 Referring now to Figures 1 and ,2, the reference
i indicates . the in?atable rim of the in?atable
seat properly due to the presence of even minute
life-boat,‘ the rim consisting of individually but
particles of foreign matter.
simultaneously in?atable upper and lower com
e above, of course, holds equally truepf rigid
cont ‘ners of low pressure capacity.
partments 2 and 3, respectively, this arrangement
It is therefore an object of this invention to 50 of compartments enabling the boat to retain its
origina1 shape in the event that either one or the
' provide ‘an in?ating or charging valve for low
other of the compartments be punctured and de
pressure resistive type envelopes or containers
which overcomes these objections and disadvan- '
flated. The bottom of the boat is represented
at 4, the oar-locks at I, and the seats at 6; the
It is also an object of this invention to-provide B8 seats being separately in?atable through‘ suitable.
connections at ‘I. At 8 is shown a pressure me
dium storage container secured to the raft struc
The release means communicates by
and thereby to valve 36. A valve cap 53, which
is provided with a plurality of openings 54, se
cured over valve seat member 35 adjacent vent
valve 36, offers mechanical protection for the vent
way of a connecting hose ID with a distributing
valve and. an outlet for any ?uid medium vented
manifold I I, which is coupled to the in?ating de
vices l2 and I3 secured to the fabric of the life
ture, and provided with pressure medium release
means 9.
' raft by means of elastic ?anges l4 and I5.
Devices l2 and [3 are of identical construc
Referring to Figure 4, the in?ating devices I 2
and I3 are connected to the manifold connector
2|, which communicates with ?uid pressure sup
tion, each serving one compartment, and will now 10 ply hose lll by means of coupling 55. Coupling 55
is provided with an alternative connection 56,
be described with reference to Figure 3.
The substantially circular ?ange H, which is
which is ordinarily closed by a cap 51, and which‘,
when desired, enables an outside ?uid pressure ,
preferably made of some material such as rub
supply to be connected into the manifold through
ber or the like, is fastened over an in?ating aper- ‘
ture l6 formed in the fabric of the rim, while a 15 a Schrader-type in?ating valve contained therein
protecting apertured piece of fabric I‘l covers the
upper surface of said ?ange and the adjacent
portions of the raft fabric, the ?ange being suit
ably cemented to both the raft and the protecting
and not shown in the drawings.
Pressure gages 53 are connected into valve body
59 to provide visible indications for the control of
the pressure within the raft compartments.
When it becomes necessary to in?ate the life
fabric. The supporting ?ange M carries in an 20
raft described, the proper manipulation of re
opening in its body, which corresponds to aper
lease means 3 of the fluid pressure storage con
ture 56 in the raft fabric, a lower portion Iii of
tainer 3, which, may be a liquid carbon dioxide
‘the in?ating valve body it. Said lowerportion
container, liberates ?uid medium under consider
53 comprises a tubular formation shaped to pro
able pressure, anywhere up to one thousand
vide a close ?t with said aperture of the rubber'
pounds per square inch, approximately, into the
?ange, into which it is securely fastened. The
hose Iii and toward manifold connector 2 i. Here,
main valve body [9 is formed with an inlet) 20
the ?uid ?ow divides, and the pressure of the
adapted for threaded connection to the manifold
incomingimedium raises the spring seated valve
connector 2! . A main valve chamber 22 is formed
adjacent to the inlet, and communicates there 30 member‘ 22, initially against the resistance of the
coiled spring 28, and practically at the same time,
with by a passage 23. A valve seat 24 is formed
taking up the resistance of spring 46 through
about said passage, which is ordinarily closed off
‘ the medium of piston assembly at, which is pro
by a check valve 25. The check valve includes a
pelled to act against spring support 53. There
sealing member 25 supported by a member 21,
upon the medium passes through passage 3| and
and is held against seat 24 by means of spring
nozzle 32 into the compartment 2, a similar pro
28, disposed in a recess 29 of the member 27 and
cedure taking place with respect to compartment
bearing with its ‘other end against a piston as
3. The in?atable compartments 2 and 3 have,
sembly 30, slidably disposed in valve chamber‘
of course, a considerably larger volume than the
.22. a passage 3! in the body i9 connects valve
chamber 22 with the inside of the raft compart 40 pressure medium container 3. The pressure me
dium, therefore, expands and fills the compart
ment 2 by way of a restricted flow‘.v nozzle 32 dis
ments at a suitable pressure, considerably lower'
posed in a suitable recess "of the body l9 and
than that originally found in the container 3,
passage 3|‘. A baffle 33 is secured into the tubular
the rate of ?ow being governed by nozzle 32.
opening of support l8 opposite nozzle 32, to di
However, as soon as such in?ating pressure with
rect the incoming ?uid straight down into the
in the compartment reaches a value which is
compartment 2 to prevent possible damage to the
higher than the predetermined force with which
fabric, which may result from a high velocity
spring 42 acts to hold vent valve 36 against its
?uid medium discharging through the obliquely
seat,- the seating force of spring 46 having been
disposed passage 3|. The valve body I9 is en
neutralized by the direct action of the in?ating
larged and apertured at 34, and carries threadedly
pressure on inlet valve 22 and piston assembly
secured to it at that point a vent valve seat 35.
30; the vent ‘valve_3S, being subject to the pres
A vent valve 36, comprising a sealing disc 37, a
sure within the compartment through the tubu
supporting disc 38, and a valve stem~39, serves to
lar opening in support it, will be unseated, and
provide a closure for the opening 40 in valve seat
cause an immediate reduction in the compart
35. Valve stem 33, which is securely fastened into
ment pressure. Immediately upon the cessation
supporting disc 38, extends centrally of the body
of the in?ating pressure within inlet 2d, spring
l9 into a recess 4| of the piston assembly 30, and‘
46 acting on the piston assembly i-lii, and spring
carries telescoped about it a light spring 42, bears
28 acting directly upon inlet valve 22, will effect
ing with its one end against a collar 43, which is
a seating thereof, and at the same time permit
held in place by means of a cotter pin 44. passing
the full force of spring 46 to bear against spring
through the stem. The other end of the spring
support 49, valve stem 39,‘ and thereby on vent
42 abutsagainst a collar Bil carried loosely by
valve 36.
the stem 39, and which, in turn, bears against a
It will be apparent from the above that during
spider formation 45, in opening 40 of the valve
' seat 35.
In addition to the seating force of 65 the inflation, the vent'valve is seated only with
the force of the light spring #2, calibrated to the
spring 42, valve 36 is held onto its seat by a strong
safe compartment pressure of approximately
spring 46, hearing ‘against a shoulder 41 formed
three pounds per square inch, while at a time
on the valve'seat member, and telescoped about
an extension 48 thereof. The other end of spring
when ‘no in?ation is taken place, the vent valve
46 is carried by the disc-shaped spring support 70 is held seated by the far larger force of spring
49. Support 49 bears against the recessed por
46 in addition to that of spring 652. This ar
rangement insures an absolutely leak-proof vent
tion 50 of piston assembly 30. A cotter pin Si in
stem 39, and aspider formation 52 in the spring
valve in accordance with the objects set forth
support 49, cooperate to provide appoint of ap
plication for the force of spring 46 to stem 39, 75
The de?ation of the life-raft compartments
6 .
may be accomplished by the opening of suitable
de?ating valves or cocks 5!, shown in Figure 1.
From the foregoing description‘ in connection -
with the accompanying drawings, it will be seen
that I have provided an in?ation device which
incorporates the objects set forth initially, and
pressure medium; a venting valve normally close
ing said venting outlet means; spring means urg
ing said venting valve towards its closing posi
tionv with a. force adapted to be overcome when .
the pressure in the venting outlet ‘means exceeds
a predetermined pressure; second spring means
aiding to maintain said venting valve in its closed
which will be recognized to constitute a decided
position with a force greater than said-predeter- ‘
improvement over prior devices of this character.
mined pressure; and ?uid pressure operable pis
‘It will also be seen from the character of the
ton means associated with said inlet means adapt
device illustrated, that the principles of coned to render said second spring means ineifective
struction of the present invention are broadly
during the introduction of pressure medium
applicable to various types of pressure medium
through said inlet means.
receiving devices; so that, while the invention
3. A valve comprising casing means having an
has been described with reference to the accom
panying drawings, I do not wish it to be limited 15 inlet, a restricted outlet communicating with the
inlet, a vent, closure means for said vent, piston
save as de?ned in the appended claims.
and valve means constructed and arranged to
cooperate with each other in response to ?uid
i. For use with a pressure medium receiving
pressure at said inlet for opening by said valve
device comprising an envelope adapted to with
of ?uid communication between said inlet
stand a predetermined degree of pressure, a maxi
and said outlet and for movement of said piston,
mum pressure safety in?ating device comprising
releasable holding means cooperating with said
a casing; an inlet for said casing formed with a
means and said piston, and spring means
chamber; an in?ating valve in said chamber nor
operating on said closure means
mally seated in said inlet; a restricted in?ating
?uid outlet; a venting outlet in said casing; a 25 through said holding means for biasing said- clo
sure means closed, said piston movement operat
venting inlet in communication with said venting
ing to release said holding means‘and to nullify
' outlet; ?uid ?ow conducting meansffrmn said
said bias.
chamber to said in?ating ?uid outlet; a venting
4. A valve for ?lling a container with a ?uid
valve normally closing said venting outlet; spring
means urging said venting valve toward its clos 30 medium to a predetermined pressure, comprising
casing means having an inlet, a restricted outlet
lng position; second spring means aiding the ac
for passing the medium from the inlet, a vent
tion of said first spring means;-and a ?uid pres
for the casing means, valve ‘means for closing
sure operable piston in said valve chamber/op
said vent, means for biasing said valve means
eratively associated with said second spring means
adapted to be acted upon by the pressure of the 35 closed with a predetermined pressure, additional
means normally biasing said valve means closed‘
in?ating ?uid‘ upon opening of said in?ating
with a force higher than said predetermined
valve whereby said second spring means is ren
pressure, and ‘means operative upon high pres
dered ineifective.
'sure in said inlet for nullifying the e?ect of said
2. A valve assembly for utilization in conjunc
additional biasing means.
tion’ with a pressure medium receiving device,
I claim:
comprising easing means having inlet means‘ for
pressure medium; venting outlet means for said
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