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Патент USA US3083896

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April 2, 1963
P. F. SCHMID ETA].
3,083,882
DISPENSING AND RELIEF VALVE
Filed Sept. 6, 1960
INVENTORS
PAUL Fl SCHMID
JOHN E- MULLER
M.
M
AT
ORNEY.
Sites
atent G ” IC€
3,983,882
Patented-Apr. 2, 1963.
1
3,083,882
DISPENSING AND RELIEF VALVE
Paul F. Schmid, Oradeilr NJ, and John. E; Muller,
Monroe, N.Y., assignors to Acme Air Appliance Co.,
Inc, Hacliensaclr, NE, a corporation of New York
Filed Sept. 6, i960, Ser. No; 54,011‘
14" (Elaims. (Ql. 222¢--396)
lat-terswhere‘ it is insealing engagement with? the inwardly
directed annular ribs The tubular metal stem‘ or plunger
has ‘a small ‘radial discharge port ‘formed therein‘ and is
movable-“axially-between» a closed position, where the
discharge. port‘lies aboveothe annularlsealing rib and’
hence~is»outvof- communication with- the container, and.
ant'open position,l where thedischarge port lies below
the-annular sealing rib and thus delivers the-pressurized‘
This invention relates generally to valve mechanisms;
mixture from the container through the tubular stem or
and‘more particularly is directed to adispensing and relief 10 plunger.’ Thus, the’ dispensing ‘function of the valve em
valve for controlling the ?ow of a ?uidl under pressure
bodyingi the-‘present invention results from- the coopera
while limiting the maximum value of that pressure, and
tion :ohlth'e inwardly, directed annular sealing rib ofthe
which is primarily intended for use with aerosolicontain‘ers
valvenbody with the outer surface and‘ Idischarge port ‘of
or other pressurized“ vessels containing liquid, semi-liquid
the "axially movable‘ stemi Further, the inwardly directed
or gaseous material under superatmospheric‘ pressure.
15 annular sealing ribi is suitablydimensioned: of the resilient
Aerosol. containers are widely used for many products,
material ifor-ming thetubular valve body so thatit‘lre
such as, for example, paints, waxes, insecticides; germil
mainsiinsealing. engagement ‘with the outer‘ surface of the
cides, shaving soaps and medications, which‘. are in the
axiallyimovablestem when- subjected ‘to any normal‘ pres
form‘ of an active liquid held under pressure by a com‘
suresewithins the container, but will yield and permit pres—
pressed' gas in the container. The container is‘ provided 20 sure tosescapez. from the container-between‘ the axially
With a normally closed dispensing valve which; when in
movable stem or plunger. and the annular sealing rib‘when
its open position, permits the liquid to be forcibly ejected
everzthe pressure in. thecontainer exceeds a predetermined
therethrough so as to form a- mist or foam of the active
safe limit."
liquid.
Inraccordaneewith' anotheraspect of the invention, the
Since aerosol containers are disposable after. the con
tubular valve-,bodyof rubber or other resilient material has
sumption of the contents thereof, it is apparent that" only a
aaradiallyioutwardprotruding top rim?'tting upwardly
very low cost valve mechanism can be used on' an aerosol
into.the inverted, cup-‘shaped valve housing protruding up
container.
Although suitably inexpensive‘ dispensing
wardly at . thecentera of I the. conventional-aerosol con~
valves have been developed which are effective to normalé
tainer cap, which. valve. housing has .acentraliopening to
1y seal the pressurized aerosol mixture in the' container, 30 permit 1 thespassageaof the valve ‘i stemor plunger there'
and to dispense the pressurized mixture upon. manual
thronghci and; this-."top rinrof the: valve; body. is sealed
actuation of the valve, such existing dispensing valves are
against the ‘inner; surface; of the. valvehousing, by means
not- capable of releasing an excess pressure withinlthe con‘
of‘alrigid£bushinginserted. within the. top-portion of the
tainer when such pressure rises above a predetermined
val-veabodyr and :a: rigid‘. retaining .collar: which‘ extends .over
safe value,'for example, by reason of exposure of the con
thervalvea body below thettoprim of .thelatter and has a
tainer to a high temperature. Thus, aerosol containers
force?t in the valve 'housingtoftthe container cap.
have been known to explode when‘the pressure thereinexi
Thee-above; and rother. objects, features ‘and advantages
ceeds a predetermined safe value, and the explosion of an
of? the-invention‘, Wi1l.be. ‘apparent in the. following de
aerosol container may cause injury to a person in‘ the
tailed: description: of i. an illustrative. embodiment thereof
vicinity thereof or at least result in the wide dispersal of
the materials in the container with attendant damage to
surrounding articles or the. like.
Accordingly, it is a principal object of the present in
vention to provide a combined dispensing, and relief valve
which is-.to ‘be read iniconnection with the accompanying
drawing. forming ‘a’ part .hereof, and :wherein:
for use on containers having materials therein‘ under pres‘
sure so that, while the valve normally seals the materials
FIG: 1. is \. anielevationalwiew, partly broken away and
in section,-.of‘ annaerosolcontainer having a dispensing
and pressure relief valve. embodyingthe present invention;
in the container and is eifective, when actuated, to‘ dispense
the pressurized materials from the container, it further
FIG; Zis anlenlarged; axial sectional viewof the com
bined‘dispensingand‘pressure reliefvalve of FIG. 1 and
of thertop; portion of theaerosol‘container in which such
valve is; mounted, with‘: the valve being shown in its
responds to an excess pressure within the container to
normal . clbsediposition;
effect the automatic release of such pressure above a pre
determined value.
Another object is to provide a combined dispensing, and
pressure relief valve of the described character which is
FIG: 31 is a. sectionaliview. similar to.that of FIG. 2,
butivshowingtthe,‘valve; in:its open or- dispensing position;
and,
FIG. 4 is an enlarged, fragmentary axial sectional view
ofra- portion of the valve in the. position of FIG. 2, but
dues and assemble, thereby making the valve suitable for 55 showing theroperation. of‘ the.valve in releasing an excess
use on disposable aerosol containers.
pressure Witlnnthe associated‘ aerosol container.
A. further object is to provide a novel arrangement, by
Referringttor thedrawing. in detail, and initially to-FIG‘.
which a dispensing valve, which preferably also functions
1; thereof, it‘: will} berseeni that a combined‘ dispensing-and
as a pressure relief valve, may be conveniently mounted
pressure‘ relief. valve embodying the present invention,
in the conventional top‘ or cap of. an aerosol‘ container,
and‘. there. generally identified ‘by the reference numeral
thereby to‘ reduce the‘ cost of assembling the valve to. the
10; is; showna in; connection with a conventional aerosol
container.
container. ellrlr of ther top-?lled} type, that is, a, container
In accordance with an‘ aspect of this invention, a com
having: a‘ top: opening; through‘ which, the container is. ?lled
bined dispensing and relief valve particularly adapted‘ for
primrtorthe: closing thereof by atop wall or cap 12 having
designed and constructed so as to be inexpensive to pro
use on an aerosol container includes‘ a small tu'bul‘ar valve 65 a peripheral rim 13 which is crimpedt around a rolled, rim
body of rubber or similar resilient material intended‘ to be
mounted in the top or cap of the aerosol container or the
like, and having an intake tube at its lower end‘. for‘ re‘
lid-at the: topt‘edge of the: container. Preferably, a sealing
gasket ‘15.1 is: inserted between rims 1'3 and 14‘. (FIG. 2.)
was to' ensure againstleakage. between the cap‘ and body
ceiving the pressurized mixture from the container and an
of container‘ 11'. The‘. cap 12 of the conventional areosol
inwardly directed annular sealing rib on its cylindrical 70 container further has an inverted, cup-shaped valve hous,
wall, and a small tubular metal stem or plunger inserted
ing IG-protruding upwardly at the center thereof.
axially into the tubular valve body to‘a position within the
As shown in- FIGS. 1, 2 and 3, the valve. 101 embodying
a,osa,sa2
.
3
r
a
the present invention includes a generally tubular valve
body 17 formed of rubber or other suitably resilient material and having a radially outward protruding top rim
18 dimensioned to ?t snugly into valve housing 16 of the:
stem 24 is disposed below sealing rib 31, that is, is located
within the lower compartment 32, and the aerosol mixture
can then enter port 34 and pass axially through stem 24
and adapter 26 for discharge through a nozzle 35 provided
container top wall or cap 12.
in a press button 36 mounted on the upper end of adapter
In order to hold valve.
body 17 securely within housing 16 with the top rim 18
in sealing engagement with the inner surface of the valve.
housing, a rigid metal bushing 19 is inserted in the top
portion. of valve body 17, and a rigid metal retaining
collar 20 extends around valve body 17 below top rim.
18 of the latter ‘and has a force or press-?t in valve housing
16 of container cap 12.
The inner bushing 19 is diametrically dimensioned so
that it maintains the radially outwardly directed pressure
of top rim 18 against the inner surface of housing 16,.
while retaining collar 20 is driven upwardly a su?icient:
distance into housing 16 so that the top edge of collar 20
acts upwardly against the lower annular surface of rim
18 to hold the latter in sealing engagement with them
derside of the top wall of housing 16. Further, as shown
in FIGS. 2 and 3, bushing 19 and collar 20 preferably‘
overlap axially so that the lower end portion of bushing
19 maintains the radially outward pressure of the side
wall of valve body 17 against the upper end portion of
collar 20. Thus, bushing 19, collar 20 and top rim 18~
cooperate to secure valve body 17 within housing 16, and
further to prevent leakage of the aerosol mixture out of
container 11 between valve body 17 and housing '16.
The lower end of tubular valve body 17 taper-s down
wardly, as at 21, and terminates in a depending inlet tube
26.
It will be apparent that the pressure of the aerosol mix
ture in container11 continuously acts within lower com
partment 32 of valve body '17, and sealing rib 31 of the
10 latter is dimensioned so as to maintain its sealing engage
ment with valve stem 24 during movement of the latter
between its closed position, as shown in FIG. 2, and its
open or dispensing position, as shown in PEG. 3, so long
as the pressure in lower compartment 32 does not exceed
15 a predetermined value. However, when the pressure of
the aerosol mixture exceeds the predetermined value, such
excessive pressure acting on sealing rib 31 is effective to
deform the latter, as shown in FIG. 4, so as to permit
the leakage of the aerosol mixture between sealing rib
20 31 and the outer surface of stem 24» into upper compart
ment 33 from which the aerosol mixture can then escape
through dispensing port 34 of valve stem 24 even though
the latter is in its normally closed or raised position.
In order to facilitate the escape of the excess pressure of
25 aerosol mixture from upper compartment 33, the top wall
of housing 16 is preferably formed with a vent hole 37
(FIGS. 2 and 3) opening from compartment .33.
It is desirable that the inner edge of sealing rib 31 be
rounded, as shown in FIGS. 2, 3 and 4, to minimize the
frictional resistance to movement ‘of stem assembly 23
22 through which the aerosol mixture within container 11v
can enter the interior of valve body 17.
by reducing the area of contact of rib 31 with stem 24‘.
The rounded configuration of the inner edge of rib 31
As shown particularly in FIGS. 2 and 3, the combined
dispensing and relief valve 10 embodying this invention
further ensures that the ?uid pressure in compartment 32
will apply an upwardly ‘and outwardly directed force
against rib 31 which deforms the latter, as shown in FIG.
further has a tubular metal stem or plunger assembly 23'
inserted axially into valve body 17 from the top of the
latter and including a tubular stem 24 containedrwholly
within body 17 and having its lower end closed by a plug
4, to interrupt the sealing engagement with stem 24 in
the event of an excess pressure.
It is further desirable to axially dimension collar 29
25, and a tubular adapter 26 having a reduced diameter
lower end portion ?tting tightly into the upper end portion
of stem 24 and projecting axially upward from the latter
through a central opening 27 in the top wall of housing
so that its lower end portion extends to thelevel of at
40 least the upper part of rib 31, as shown in FIGS. 2, 3 and
4, thereby to give radially outward support to the part of
the side wall of body 17 from which rib 31 extends.
16. The upper end of tubular stem 24 may be formed
From the above it will be apparent that, so long as the
with a radial, outwardly directed ?ange 28 adapted to
pressure of aerosol mixture within container 11 does not
engage against the underside of the top wall of housing 45 exceed a predetermined value, which depends upon the
16 around the central opening 27 in order to limit the
hardness of the rubber of valve body 17 and the dimene
upward movement of‘stem assembly’i‘23 ‘at the position
sions and shape of its sealing rib 31, the valve 10 acts
illustrated in FIG. 2. A helical compression spring 29 is
to normally seal the aerosol mixture within container 11
positioned within valve body 17 and has its lower end
and to dispense controlled quantities of the aerosol mix
bearing against a ‘seat 30 formed at, the upper end of inlet 50 ture upon depression of the push-button 36. However,
tube ‘22, while the upper end of spring 29 bears against
in the event of a possibly dangerous increase of the pres
the lower end edge of tubular stem 24 andis located by
sure of aerosol mixture in container 11, valve 11) embody
engagement around plug 25 which projects downwardly
ing this invention acts automatically to release the ex
from stem 24. Thus, spring 29 acts to yieldably urge
cess pressure from, the container, thereby to avoid any
stern assembly 23 to its uppermost position illustrated in 55 possibility of an explosion or forcible rupture of the con
FIG. 2.
.
tainer.
As shown particularly in FIGS. 2 and 3, valve body
17 is further formed with an inwardly directed annular
is capable of operating as both a dispensing valve and a
sealing rib 31 extending from the cylindrical wall of the
valve body intermediate the ends of the latter and nor
mally disposed in sealing engagement with the outer sur
face of valve stem 24, thereby to cooperate with the lat
ter in dividing the interior of valve body 17 into a lower
compartment 32 which is always in communication with
the interior of container 11 through inlet tube 22, and an
upper compartment 33 which is normally sealed-01f from
the interior of container 11 by the sealing engagement of
,
Further, it will be apparent that the valve 10, which
pressure relief valve, as described above,'is of relatively
60 ‘simple construction thereby to make possible its inex
pensive production as is required of a valve suitable for
use in disposable aerosol containers. It is also to be
noted that the described arrangement ‘for securing and
sealing the valve body 17 within the usual housing 16
of container cap 12 substantially facilitates the assembly
of valve 10 in the container cap 12 as the latter does not
need to be deformed or otherwise worked, and thereby
rib 31 with Valve stem 24.
further reduces the assembly costs.
Valve stem 24 is formed with a radial dispensing port
34 located in the lower portion of the valve stem above 70 Although the valve 10 has been shown in the drawing
as being mounted in the cap of a top~?lled container, it
plug ‘25 so as to be disposed above sealing rib 31 when
valve stem assembly 23 is in its uppermost position of
FIG. 2. However, when’ valve stem assembly 23 is de
pressed against the action of spring 29, for example, to
the position illustrated in FIG. 3, dispensing port 34 of 75
is apparent that the valve 10 embodying this invention
may be similarly mounted in a correspondingly formed
top wall of a bottom<?lled container, that is, a container
having an opening at the bottom thereof to receive the
5
3,083,882
aerosol mixture and‘ which‘ is thereafter permanently
6
gral annular rib directed radially inward‘ from the in‘
sealed by a bottom wall or closure.
ternal surface thereof at a location intermediate: the
Further, although a particular‘ embodiment of the in
vention has been described in detail herein with-reference
to‘the accompanying drawing, it is to be noted that the
invention is not limited to that precise embodiment, and
that various changes and modi?cations may be effected
therein without departing from the scope or spirit of this
invention, except as de?ned in the appended claims
What is claimed is:
1.. A valve comprising a tubular 'valve body having a
resilient, inwardly directed annular sealingrib and means
opposite“ ends of the body, said rib being normally in
for admitting a ?uid‘ under pressure to the interior of
said body at one side of said sealing rib, and a tubular
sliding sealing engagement with the surface of said valve
stem to‘ prevent the-passage‘ therebetween of. ?uid under
pressure‘ from said one end to saidother'end of thevalve
body, said‘ valve stem‘ having a radial‘ port‘ opening‘ into
said axial bore,urneans yieldably urging said valve stem
axially to a‘ closed? position where‘ said port is disposed
between said rib and said other end of the valve body,
manually operable means. for displacing: said valve stem
axially against the force of said‘ urging means to an
open‘ position where said port is disposed between said
rib‘ and: said one end' of the valve body to receive ?uid
valve stem‘ extending axially in said body and having 15 under pressure from said inlet for discharge through said
said sealing rib‘ normally in sealing engagement with the
axial bore of the valve stem, and vent means for com
outer surface of said stem, said valve stem having. a dis
municating said other end: of. the valve body with the
pensing port therein and being axially movable relative
atmosphere,. said sealing. rib being yieldable and‘ mov
to said body between a closed position, where‘ said port
able‘ out of sealing engagement with‘ said valve stem
is disposed at' the other side of said sealing. rib, and a 20 by an excess of pressure at said one end to pass the‘?uid
dispensing position, where said port is disposed at. said
one side of the sealing rib to discharge fluid under pres‘_
sure through said tubular valve stem, said‘ sealing. rib
being. responsive to an excess of ?uid pressure at‘ said
one‘ side thereof‘ to move out of sealing engagement with
said valve stem and’ form between‘ said‘rib and said stem
a passageway for release of the excess pressure.
2‘. A valve. comprising a resilient tubular valve body
having an inwardly directed annular sealing rib inter
under excess pressure between said rib and said valve
stem for escape through‘ saidlvent means.
5; The‘ combination of a‘ container for a ?uid under
pressure having a wall with, an ‘aperture therein; and a
combined dispensing and relief valve comprising a re‘
silient tubular, valve body mounted in said wall with
one end of said valve‘ body extending around said aper
ture at. the inside of said wall, said valve body having
mediate its ends, a tubular valve stem axially movable
an inlet for ?uid under pressure ‘at its‘ other end‘ which
opens into the interior of said container and a radially
in‘ said valve body with said‘ sealing rib being normally
directed, internal. annular sealing rib located. intermedi
in sealing engagement with the surface of said valve
stem to divide the interior of said valve body into two
ate the opposite ends of said valve body, and‘ a tubular
compartments, and means for admitting a ?uid under
pressure into one of said compartments, said valve stem
having a radial port and‘ being movable between a closed
position, where said port is located in the other of said
compartments, and an open position, where said port is
located‘ in said one compartment to receive fluid under
pressure for discharge through- said tubular valve stem,
said sealing rib being responsive to an excess pressure
of fluid in said one compartment to move out of sealing
engagement with said valve stem and‘ form between said
rib‘ and said stem a passageway‘ for release‘ of the‘ ex
cess pressure;
3. A valve‘ comprising a resilient tubular valve- body
having‘ an inwardly directed annular sealing rib located
intermediate the ends of the valve body, a tubular valve
valve stem extending through said aperture ‘axially into
said valve body past said'sealingrib, said rib being nor
mally in sealing engagement with the surface of said
valve stem, said‘ valve stem having: an axial bore which
is closed at the inner end‘ of the valve- stem and ‘a radial
port opening‘, into said axial bore, said valve stem being
axially movable relative to said valve body between a
closed position, where said radial port is: located inter
mediate said rib and said one end of the valve body and
thus isolated from the ?uid under pressure unless the
pressure exceeds‘ a predetermined‘ value, and‘ an open
position, where said port is located intermediate. said‘ rib
and said other end’ of, the valve body to receive ?uid
under pressure from said inlet for discharge from. said
container through. said axial bore of the valve‘ stem, said
one end of the latter with said sealing rib being nor
rib being responsive to a ?uid pressure at said other end
in excess. of said predetermined‘ value to move out of
sealing engagement‘ with said stem and form' a passage
mally in sliding sealing engagement with the surface of
way between. said‘ rib' and‘ said stem for release of the
said valve stem, means closing‘ the end‘ of said tubular
valve stem within the valve body, and inlet means for
admitting a- ?uid under pressure to the interior of said
valve body at the other end. of the latter, said- tubular ‘
valve stem having a radial port- and being axially mov
able relative to said valve body between a closed posi
excess pressure;
'lar: valve body disposed‘ in said protrusion and having
tion, where said port is located between said sealing rib
one end. seating ‘against the inner surface‘ of said pro
stem extending ‘axially; into said valve body through
6; The ‘combination of a container for: a ?uid under
pressure formed withv ‘a generally cup-shaped protrusion
opening. into» the‘ interior of. the container ‘and having ‘a
central aperture; and a valve com-prisinga resilient tubu—
and said one end of the valve body so as to be normally
trusion around said aperture, said valve body further
isolated from said inlet means, and an open position 60 having an external, radially enlarged rim at said one
where said port is located between said sealing rib and
said other end of the valve body so as to receive ?uid
under pressure from said inlet means for discharge
end thereof, a rigid bushing in said ‘tubular valve body
adjacent said one end to hold said rim radially outwardly
against said protrusion, a rigid retaining collar extend
through said tubular valve stem, said sealing rib being
ing ‘around said valve body and engaging axially against
responsive to an excess pressure of ‘?uid admitted to said
valve body through said inlet means to move out of
sealing engagement with said valve stem and form a pas
sageway between said rib and said stem for release of the
excess pressure.
said rim, said collar having a force ?t in said protrusion
to secure said valve body in the latter and prevent leak
age of ?uid under pressure between said valve body
and said protrusion, means de?ning an inlet for ?uid
under pressure at the other end of said valve body, a
4. A valve comprising a resilient tubular valve body 70 tubular valve stem extending axially through said aper
ture into said valve body and being movable relative
thereof, a tubular valve stem extending axially into said
to the latter between open and closed positions, and
valve body through the other end of the latter and hav
cooperating means in said valve body and valve stem to
ing an axial bore which is closed at the end of said stem
discharge ?uid under pressure from the container through
within said valve body, said valve body having an inte 75 said valve stem in said open position of the latter and
having an inlet for a ?uid under pressure at one end
aosassa
7
8
to seal the ?uid under pressure in said container in said
closed position of the valve stem.
which is closed at its lower end, said valve body having
an integral internal annular sealing rib in sealing engage
7. The combination of a container for a ?uid under
'ment with said valve stem assembly to prevent the pas
pressure formed with a generally cup-shaped protrusion
opening into the interior of the container and having a
in the container is below a predetermined value, said
sage of material therebetween so long as the pressure
rib ‘being responsive to a container pressure in excess of
said predetermined value to move out of sealing engage
ment with said valve stem and form a passageway be
one end seating against the inner surface of said protru
sion around said aperture, said valve body further having
tween said stem and said rib for release of the excess
an external, radially enlarged rim at said one end there 10 pressure, said valve stem assembly having a radial port
central aperture; and a valve comprising a resilient tubu
lar valve body disposed in said protrusion and having
of, a rigid bushing in said tubular valve body ‘adjacent
opening into said axial ‘bore ‘and being axially movable
said one end to hold said rim radially outwardly against
between a closed position in which said port is disposed
above said rib and a depressed open position in which
said port is disposed below said rib to receive material
from said inlet for discharge through said axial bore, and
means urging said valve stem assembly upwardly to said
said protrusion, a rigid retaining collar extending around
said valve body and engaging axially against said rim,
said collar having a force ?t in said protrusion to secure
said valve body in the latter and prevent leakage of
?uid under pressure between said valve body and said
protrusion, means de?ning an inlet for ?uid under pres
sure at the other end of said valve body, and a tubu
closed position.
11. The combination as in claim 10; wherein said means
securing the valve body in the housing includes a radially
lar valve stem extending ‘axially through said aperture 20 enlarged, external rim at the top of said valve body ?tting
closely in said housing, a rigid bushing in the top portion
into said valve body and being axially movable relative
of said valve body, and a retaining collar pressed into
to the latter between open and closed positions, said tubu
said housing around said valve body and bearing upward
lar body having an inwardly directed annular sealing rib
ly ‘against said rim of the latter for holding said rim in
integral therewith and normally in sealing engagement
sealing engagement with the inner surface of the housing
with said valve stem to prevent the escape of ?uid under
around said aperture of the latter, said collar extending
pressure therebetween, said rib being responsive to an
‘down to the level of said rib to radially support said
excess of ?uid pressure at said other end to move out
tubular valve body in the region of said sealing rib of the
of sealing engagement with said stem and form ‘between
latter.
said rib and said stem a passageway for release of the
12. The ‘combination ‘as in claim 11; wherein said
excess pressure, said valve stem having a radial port lo 30
bushing and collar overlap axially so that said bushing
cated so as to be disposed between said rib ‘and said inlet
holds said tubular valve body in sealing engagement with
in said open position of the valve stem and to be dis
said collar to prevent the leakage of material therebe
posed between said rib and said one end of the valve
tween.
body in said closed position of the valve stem.
‘13. The combination as in claim 10; wherein said valve
8. The combination as in claim 7; wherein said pro
trusion has a vent opening therein adjacent said aper
ture and opening into said one end of the valve body
body has a seat formed therein around said inlet and said
valve stem assembly has a plug in its lower end to close
‘a centrally apertured valve housing protruding upwardly
through said aperture of the housing.
said lower end of the discharge bore; and wherein said
to permit the escape of ?uid under pressure therethrough
urging means is a helical compression spring having its
when said rib is moved out of sealing engagement with
said valve stem by said excess pressure acting against said 40 lower end bearing against said seat and its upper end bear
ing against the lower end of said valve stem assembly
sealing rib.
around said plug.
9. A valve as in claim 3; wherein said sealing rib has
14. The combination as in claim 10; wherein said valve
a rounded inner edge engaging said valve stem to mini
stem assembly includes a tubular valve stem wholly con
mize the frictional resistance to movement of the latter
and to provide a radially outward force component act 45 tained in said valve body vand having an outwardly
directed radial ?ange at its upper end engageable with
ing on said rib when ?uid under pressure is admitted
said housing to limit the upward movement of said as
through said inlet means to urge said rib away from said
sembly at said closed position, and a tubular adapter
stem ‘at said excess ?uid pressure.
joined to the upper end of said valve stem and extending
' 10. The combination of a container having a cap with
at the center thereof; and a combined dispensing and
relief valve comprising a resilient tubular valve body in
said housing and having an inlet at its lower end com
municating with said container to receive pressurized ma
terial from the latter, means securing said valve body 55
in said housing, and a tubular valve stem assembly pro
jecting downwardly through the aperture of said housing
into said valve body and having an axial discharge bore
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,744,665
2,746,796
2,818,202
2,856,235
Carlson et al. _________ __ May 8,
St. Germain __________ __ May 22,
A'bplanalp ___________ .__ Dec. 31,
Ward _______________ __ Oct. 14,
1956
1956
1957
1958
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