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1366- '17, 1946-
J. A. HOFFMAN ETAL
2,412,685
CONDUIT COUPLING
Filed April 22, 1944
2 Sheets-Sheet l
m \llllmllllllll‘
'IHI
INVENTORS
SAMUEL R. OLDHAM
JAMES A. HOFFMAN
WILGOT J. JAQOBSSON
BY,
ATTORNEY
Dec. 17, 1946.
J. A. HOFFMAN ETAL
2,412,685
CONDUIT COUPLING
Filed April 22, 1944
2 Sheets-Sheet‘ 2
INVENTORS
JAMES A. HOFFMAN
SAMUEL R. OLDHAM
WILGOT J. JACOBSSON
BY
ATTORNEY
12,412,585]
Ratented Dec. 17, 1946
‘UN/limo 1 STATES A PATE NT], OFFICE.
2,412,685
‘
,
'
coNnUrr COUPLING‘
James Arthur Hoffman, Roselle, Samuel _R.
Oldham, West Orange, and Wilgo't J. J acobsson,
Plain?cld, N. J., asslgnors to.vThe Linde Air
Products Company, New York, N. .Y., a corpo
ration of Ohio
Application‘April 22, 1944, Serial No. 532,264
16 Claims. ' (Cl. 284-—19)
1
This invention relates to conduit couplings, and
. the coupling units, e. g., the plug unit X. . An an
more particularly to an improved conduit cou
pling of the socket-and-plug pressure-sealed type
especially adapted for readily connecting and‘
disconnecting a hose and a ?uid supply device.
In conjunction with breathing equipment used
on airplanes, for example, it is essentialthat the
means for coupling every individual oxygen sup
ply hose to the supply of oxygen under pressure
shall be quickly attachable to the oxygen sup-'
ply device and dependable to deliver the oxygen '
whenever it is needed; shall provide a seal with
in the coupling that is reliable over a wide range
of applied gas pressures and under widely vary’
ing temperatures; and shall not kink or twist the
gas hose that delivers the oxygen for breathing.
The principal object of this invention is to pro
vide a conduit coupling which meets the fore
nular tapered 0r frusto-conical free wall portion
l2 adjacent the other end of thetubular sealing
membrane or element S is arranged to engage
and fit. an annular or conical internal seat l3
on the other coupling unit, e.’ g., the socket unit
Y; the construction being such that the pressure
of the ?uid such asoxygen ?owing through the
coupling and into the resilient sea-ling element
S will maintain a fluid-tight or sealed joint be
tweenthe tubular sealing membrane YS and the
annular seat l3 along their mutually contacting
surfaces.
-
The annular seat l3 desirably is formed inter
nally adjacent the end of a metal tube T consti
tuting a part of one of the coupling units, e. g.,
the socket ‘unit Y; and, in order to prevent vdam
age to the delicate sealing element S while con
going requirements and yet is comparatively in
necting or disconnecting the coupling units, the
expensive to manufacture and install, and easy to 20 metal tube '1‘ in locked or secured against rota
manipulate. These and other objects, and the
tion about its axis and relatively to the sealing
novel features of the invention, will become ap- 1
element S when the‘ latter engages the annular
parent from the following description and the
seat i 3. This locking function desirably is ac
accompanying drawings in which:
complished by cooperating positioning and in
Fig. 1 is a central longitudinal sectional view of 25 terlocking means on the two conduit units, which
means may consist of a pin l4 carried by one of
this invention;
I
the units, e. g., the plug unit X, and a crown C
Fig. 2 is an exploded view mainly in side ele
comprising a circular row of spaced-apart ?ngers
vation of the parts of the plug conduit unit of
l5 secured to the other unit, e. g., the tube T, of
a conduit coupling embodying the principles of
such coupling;
‘
Fig. 3 is a view similar to Fig. 2, of the parts of
the socket conduit unit shown in Fig. .1.
Fig. 4 is a central longitudinal sectional view
of a modi?cation of the invention.
Fig. 5 is a cross-sectional view taken on line
’ 5-5 of Fig. 4; and
30 the socket unit Y, to provide a row of open-ended '
slots ii, any one of which may receive the pin [4
endwise therein when the units X and Y are tele
scoped axially relatively to one another to con
nect them together.’
To provide a readily connectible and discon
nectible union, the two units X and Y desirably
are additionally’ provided with pin-and-slot or
Fig. 6 is a central longitudinal sectional view of
another modi?cation, the units being shown par
bayonet-type connecting means, manually opera
tially uncoupled.
ble with the aid of a spring G to releasably lock
.
Generally speaking, and referring to Figs. 1, 2 40 the units in telescoped relation, securing them
and 3 which illustrate a preferred embodiment of
the invention,‘ the, improved conduit coupling
' comprises a plug conduit unit X having one end
thereof constructed so as to telescope axially into
and. releasably interlock with a mating socket
conduit unit Y, to provide‘ a ?uid passage through
the coupling, which passage is effectively sealed
against axial relative movement except against
the force of said spring G. One of ‘the units, e. g.,
the plug unit, may be provided with two diametri
cally opposite L-shaped slots‘ l‘l, either of‘ which
receives a pin l8 carried by the other unit, ‘e. g.,
the socket unit. This pin l8 desirably is carried
by a sleeve or ferrule F secured‘ but rotatable
against ?uid leakage to the atmosphere. The
relatively to the tube T. The sleeve F is ‘concen
?uid-pressure sealing means includes a substan
trically connected to the exterior of the tube IT
tially tubular or conical membranous element S, 50 intermediate the ends of the latter, as by an in
desirably formed of anode rubber or ‘other suita
turned ?ange IS on the ‘sleeve ?tting slidably
ble elastic or resilient materiaL'which is arranged
within a circumferentialgroove‘ 20 formed be
coaxially within and has an annular ?ange l0‘ at
tween an annular ‘?ange 2|“ on the tube T ‘and a
one end thereof clamped in sealing contact with
ring 22 secured to the ‘tube‘T by an outwardly
an inner annular surface or‘ shoulder I I of one of 55 spun bead 23. Thus, the part of the tube T pro
9,419,885
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3
outside the sleeve.
"
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4
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'
spacer l0\,\presses the ?ange Ill against the shoul
vided with the internal annular seat It is within
the sleeve F and a part 24 of the tube projects
der ll, while a cylindrical surface portion 44 of
_ the shell B contacts with and holds these parts
The external tube part 24 is designed to be lit
into and non-rotatably secured to a hose H or
radially in place. When the seat R, the spacer
40 and the ?ange III are thus clamped in position,
all Joints between them and the casing sections
A.and B are e?ectively sealed, and the valve seat
R cooperates with both the lip 31 and the face
the latter' may be turned about its axis inde
38 of the valved], to‘seal the chamber K when
pendently of the tube and the hose both before
and after the tube T is locked against rotary 10 the valve is closed.
The bayonet slots H at the front,end of‘ the
movement in sealing position with respect to the
similar conduit; and, by virtue of the rotatable
‘ connection between the tube T and the sleeve F,
plug unit may be formed in any suitable manner,
as by turning down two stepped circumferential
sections 45 and 43 on the exterior of the shell B
sleeve is turned to position to interlock the pin 15 adjacent its front end‘ and .then providing such
stepped sections with an interiorly reversely
l8 thereon with-one of the bayonet slots H on
stepped ring 41, the latter being secured iii-place
the plug unit.
against the inner shoulders 48 and 49 by spinning
A normally-closed valve is included in one of
outwardly the extreme end'portion of the shell to
the conduit units and is constructed and arranged
to be actuated and opened by the other conduit 20 overhang and engage the outer edge of stepped
unit when the two units are coupled together. As , ring 41, as at 50. Before securing the stepped
ring 41 in place, its rear edge is appropriately re
shown, the plug unit X contains a disc-type valve
cessed and notched at diametrically opposite sides
V normally held by the coil spring G, assisted
to provide the circumferentially extending por-'
‘by the ?uid pressure, against an annular valve
,seat R of suitable yieldable material, and a tubu 25 tions of the bayonet slots l1, and notches are
cut from the front edge perpendicularly to the
‘lar valve stem E secured to the valve V extends
recesses to provide the entrances of the bayonet
axially through the coaxially arranged seat R
sealing elements in'the plug unit. Thus, damage
to the sealing element S and also kinking or
, twisting of the hose H is prevented when the
andsealing element S, so that the free annular
slots l‘l.v The pin l4, which cooperates with the
?ngers l5 and slots iii of the socket unit Y to lo
end 25 of the valve stem will be engageable by
an internal annular shoulder 26 on the tube T, 30 cate and lock the coupling units in telescoped
relation, may be secured to the shell B by rivet
to push the valve V axially oil the seat R when
ing its shank in a hole extending through the
the units are coupled together. Thus ?uid may
stepped section 46, so that the head of the pin.
?ow through four radial holes 21 provided in the
l4 will be located in and be about the same height
valve stem E adjacent the valve V, causing the
application of ?uid pressure against the inside 35 as the increased diameter of a counterbore 5|
in the‘ shell B.
,
,
of the resilient sealing element S to provide a
The tube T of the socket unit Y has a ?uid pas
?uid-tight seal between the conical end portion
l2andthe seat l3.
'
,
sage 5la which has the same diameter as ?uid
passage 52 through the tubular valve stem E, and
The plug unit X desirably includes a two-piece
generally tubular casing comprising a nipple ‘A 40 is coaxial therewith when the end 25 of the stem
E engages the shoulder 26 to unseat the vatve V.
and a shell B detachably connected together by
The tapered internal seat I3 of the tube‘~'T is
inter'fitting threads at 30, and hexagonal wrench
formed'by counterboring the tube on a long taper
heads are provided at 3| and 32 to aid in tightly
to ?t an extended area of the outer substantially
securing them together, to separate them. and to
conical surface of the sealing element S.
secure this- unit to a ?tting. The outer end of
The locating and locking ?ngers .l5 and ‘slots
the nipple A has an externally threaded boss 33
IS on the tube T may be provided by cutting the
adapted rigidly to secure the plug unit to a ?uid
longitudinal slots lengthwise into a tubular metal
conduit, such as the internally threaded outlet
piece C in such manner as to leave a circular row
of an oxygen supply ?tting D; and a ?uid inlet
passage 34 in the boss 33 opens into a valve cham 50 of spaced-apart arrow-shaped or pointed ?ngers
l5 and also to leave a cylindrical band 53 clos
ber K in the nipple. The valve centering and
ing the inner .ends of the slots l6 and connecting
closing spring G bears at one end against a shoul
the ?ngers I5 together but in spaced relation to
der 35 at the bottom of the chamber K, and its
one another. This crown or ?nger-slot assembly
other end ?ts around a boss 36 on the rear of the
C is substantially the same thickness as the height
valve and bears against the latter.
'
of the head of the pin l4, and said assembly may
The inner end of the nipple A has an axially ex
be rigidly and non-rotatably staked-or secured
tending annular lip or ?ange 31 arranged seal
to the outside of the tube T by driving diametrié
ingly to engage the annular valve seat It outside
cally opposite projections 54 on ‘the band 53 into
the area thereon that is engaged by an annular
correspondingly
located recesses 55 in the outer
60
seating face or edge 38 of the valve V. An annu
lar spacer 40 composed of rigid material such as >
I metal having substantially the same inside and ’
surface of the tube T.
.
The head of the pin ' l4 desirably is rounded or
circular and, when telescopically coupling the
outside diameters as the seat R, is located be
units X and Y, ?rst engages the pointed end of
tween the latter and the ?ange III of the sealing
element S. The spacer 40 hasa ?ange or an 65 any one of the ?ngers ii to smoothly position the
' nular extension 4| at its inner edge which pro
units circumferentially relatively to one another
and to preliminarily non-rotatably lock the tube
T relatively to the sealing element S in such
Jects into the sealing element S and supports the
latter internally. At least a part of the elastic
manner that the sleeve F may be rotated, with
sealing element S, which desirably is substantially
of frusto-conical shape, engages and is externally 70 out rotating the tube T, to locate the head of
supported by a smooth section or portion 42 of
the interior surface of the shell B.
When the nipple A and shell B are screwed
together and in contact at 43, the lip 31 of the
nipple presses into the seat It and, through the 75
pin [8 on the inside of the sleeve opposite the
entrance of one of the bayonet slots l1. There
upon,‘ the units may be telescoped into their ?nal I
coupled position and the pin I4 pushed farther
into the slot IS with which it has registered,
3,412,685.
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is
,
after which the sleeve F may again be rotated
independently of the tube T to seat the pin it
s
,
,
,
,
used without other features, (as. forexampiaa
coupling without a valve may be constructed ac
in the circumferential part of the bayonet slot - I‘ cording to this invention, or a valved coupling
without the improved sealing means and seat ; '
which it entered to eifectively releasably lock the '
two units in coupled relation, the spring G coop
erating to retain the units in such locked rela
- tion.
therefor may be constructed according tothis
invention. While, in the couplings herein illus
trated. the plug unit constitutes the ,?uid inlet
The improved conduit couplings illustrated in
and the socket unit constitutesethe ?uid outlet,
Figs. 4, 5 and 6 also embody principles of this
it will be understood that the principles of the
invention and, except for the major differences 10 invention are equally applicable to a coupling
to be described below. are structurally similar to
wherein the valve V and its seat R as well as the
the preferred form of coupling illustrated in Figs.
sealing element 3 are located in thesocket unit
1, 2 and 3.
and the seat I: is located in the plug unit, to
In Figs. 4 and 6, respectively, the ends of tubu
provide a coupling wherein ?uid enters through
lar stems E’ and E" for unseating the valves 15 the socket unit and discharges through the plug
V’ and V" are secured axially within the tubes
unit. The couplings of the invention may be
T’ and T" at 25-’. 26', and 25", 28"; and the
used to conduct any ?uid under pressure, espe
other ends of these stems E’ and E" engage
cially gases such asv oxygen, air, acetylene or rare
in grooves 60', 60" in the faces of the valves
when unseating the latter. Short tubes ll’ and 20
II" near the valve seats R’ and R" are arranged
> slidingly'to ‘engage the outer surfaces of the
stems E’ and E", to guide the latter and pre
vent damage to the sealing elements S’ and S"
_by the stems E’ and E”.
(3 Ci
In Fig. 4, the tubular elastic ?uid-pressure seal
ing element '8' has a cylindrical section 6| to fit
the interior cylindrical surface 42’ ‘of smaller
diameter than the surface ",to yieldingly hold
the tubular part ll" in place and to provide in 30
creased sealing ‘area.
In Fig. 6, the tubular elastic sealing element
S" is shown as an annular channel facing the
gases.
‘
'
What is claimed is:
Y
1. A conduit coupling comprising, in combina
tion, a socket conduit unit; a plug conduit unit
readily attachable to and detachable from said
socket unit; one of such units including a sub
stantially tubular casing and a tubular elastic
sealing element having one end thereof in sealing
contact with the interior surface of said casing;
the other of such units including a tube having
an annular seat adapted to engage an annular
portion adjacent the other end of said sealing
element to provide a ?uid-tight joint between
said sealing element and said tube when said
socket unit is attached to said plug unit; saidv
units having cooperating interlocking means op- '
tubular part-4i", to enclose a helical spring 62
that bears against and normally spreads apart 35 erable to prevent rotation of said tube relatively
opposite annular limbs or ?anges 63 and 64 “of
the element S". The limb 63 makes sealing
contact with the shoulder 65 in the shell B",
and the end 66 of the tube T” engages the limb'
6i and compresses the spring 62, to provide an
effective ?uid-tight joint when the coupling units
are telescoped together.
I
‘
to said sealing element when the latter engages
said seat.
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2. A conduit coupling comprising, in combina
tion, a. substantially tubular casing; a tubular
elastic sealing element in said casing; a tube hav
ing an annular seat adapted to engage an annu
lar portion of said sealing element to provide a
In both Figs. 4 and 6', the means for locating
and locking the tubes T’ and T" relatively to
the sealing elements S’ and S" are reversed with
respect to the corresponding locating and look
ing means shown in Fig. 1; and the bayonet
?uid-tight joint; a. sleeve telescopically ?tting
?ngers 15' within a cylindrical piece 53’, secured
around the front endof the shell B’. Similarly,
elastic sealing element in said casing; an annu
lar valve seat in said casing; a valve normally
said casing and secured to and rotatable rela
tively to said tube; cooperating means on said
casing and said sleeve to couple said casing and
said sleeve in telescopic relation andto' hold said
seat against said sealing element; and means to
connections of the sleeves F’ and F" to the shells
prevent rotation of said tube relatively to said
B’ and B" also are reversed with respect to the
corresponding bayonet connection of Fig. 1. In’ 50 sealing element when the latter engages said
seat.
‘
Fig. 4, the tube T’ has ‘diametrically opposite
3. A conduit‘coupling comprising, in combina
pins H’, ll’ arranged to slide into any two di
tion, a substantially tubular casing; a tubular
ametrically opposite slots l6’, l6’ between pointed
spring-pressed against said valve seat. and hav
the tube T" carries diametrically opposite radi
ing a tubular valve stem extending into said tubu
ally projecting pins I4", l4" arranged to slide
lar sealing element; a tube having an annular
into any two diametrically opposite slots l6",
surface adapted to engage an annular portion
16" between a row of spaced-apart pointed ?n
gers l5" formed integral with the front end of v60 of said sealing element to- provide a ?uid-tight
joint, and also having means adapted to engage
the shell B". In both Figs. 4 and 6, respectively,
said valve stem to‘ push said valve away from
the shells B’ and B" carry diametrically oppo
said valve seat and open said valve; a sleeve tele
site radial pins l8’, l8‘ and l8", l8" arranged
scopically ?tting, an exterior portion of said cas
to engage in and cooperate with pairs of bayonet
ing and secured to and rotatable relatively to said
slots l1’ and I1" inthe sleeves F’ and F", to
tube; pin-and-slot means onsaid casing, and saidv
releasably lock the two units X’ Y’ and X" Y”
in fully telescoped relation.
sleeve to couple‘ said casing and said sleeve in
telescopic relation and also to holdsaid tube in
‘ While several embodiments have been disclosed
position to press said. annular surface against
herein to illustrate the principles of this inven
tion, it will be evident that numerouschanges in
said sealing element and to open said. valve; and
the details of construction and arrangement of
longitudinally-interlocking, means on said‘ casing
parts are possible without departing from the . and said tube to prevent rotation ‘of said ‘tube
principles of the- invention or sacri?cing its ad
relatively to said sealing element when said, an
vantages. Furthermore, it .will be understood
nular surface engages said sealing element- , I l
that certain features of the invention may be 75 4. A conduit coupling unit comprising. in com
9,412,688
'bination, _a shell having an internal annular
shoulder, a nipple>~removably secured in said
relatively to said tubular ?uid pressure sealing
membrane when said annular end portion en
against relative rotary movement, pin\and slot
operating longitudinally interlocking crown-and‘
means acting releasably to lock said units to
gether, the parts of said units which are secured
and locked by said means comprising a tubular
?uid-pressure sealing membrane composed of
delicate resilient material carried by one unit,
pin means to prevent rotation of said tube rela
tively to said tubular ?uid-pressure sealing
gages said annular seat, wherein said annular seat1
shell, said nipple having an axially projecting
is provided by a tapered internal portion adja
annular ?ange, a tubular ?uid pressure sealing
element having an annular ?ange‘ at one end Cl cent the end of said tube within the plug unit.
11. A ?uid pressure-sealed type conduit cou
seated on said annular shoulder, - an annular
pling comprising, in combination, a plug conduit
spacer, an annular valve seat, said valve seat and
unit including an elongated tubular ?uid-pres
spacer being disposed between the ?ange of said
sure sealing membrane therein; a socket conduit
sealing element and the ?ange of said nipple and
secured in place in said shell thereby, a valve in 10 unit readily attachable to and detachable from
said ‘plug unit, said socket unit including a tube
said nipple, and a spring in said nipple urging
extending into said plug unit and having an an
said valve toward .said valve seat.
nular seat within the plug unit engageable by
5. A ?uid pressure-sealed coupling comprising
an annular end portion of said tubular ?uid-pres
in‘ combination, a‘ planet conduit units, crown
and pin means acting to secure parts of said units 15 sure sealing membrane; said units including co
and a tubular seating member for said membrane
membrane when‘ said annular end portion en
gages said annular seat, wherein said annular
seat isx'p‘rovided by the inner end of said tube
within the plug unit.
12; A ?uid pressure-sealed type conduit cou
pling comprising, in combination, one conduit
arrangement of the combination ‘being such that '
\ said crown and pin means axially guide said units 25 unit including a tubular shell having on the in
side thereof a threaded portion at one end, a
and thereby prevent any relative rotary move
first smooth surface portion, a shoulder facing
ment between said tubular ?uid-pressure sealing
carried by the other unit, the construction and
membrane and said seating member when they
are unlocked and uncoupled.
~
such ?rst smooth surface portion, a second smooth
surface portion of lesser diameter than that or
6. A ?uid pressure-sealed coupling as de?ned‘ 30 such ?rst smooth surface portion, a third smooth
" surface portion of greater diameter ‘than that
by claim 5, in which said ?uid-pressure sealing
membrane has a conical free wall portionadapt
ed to form a ?uid-tight seal with a correspond
ingly shaped’ seat on said seating member.
7. A ?uid pressure-sealed coupling as de?ned
by claim 5, in which said ?uid-pressure sealing
membrane has a cylindrical body portion and
.iree'end portion, said portions both being adapt
of such second smooth surface portion, and at
' the other end a fourth smooth surface portion
of greater diameter than that of such third
smooth surface portion, a conical'sealing element
of resilient material having a ?ange seated on
said, shoulder and a body portion ?tting'such
second smooth surface portion, an annular spacer
engaging such ?ange and said body portion, an
ed to expand to form fluid-tight seals with cor
respondingly shaped seats surrounding such por 40 annular valve seat of ?exible material mounted
on said'spacer,.a nipple engaging the threaded
tions' when said units are coupled together.
portion of said tubular shell having an axially
8. A ?uid pressure-sealed coupling as de?ned
projecting annular lip at one end engaging said
by claim 5, in which said ?uid-pressure sealing
valve seat, said nipple having a ?uid inlet at
membrane is in the form of a cylinder having
radially extending annular ?anges at each end, 45 the other end, an internal spring supporting
shoulder, a spring chamber,‘ and a valve chamber,
a helical springisurrounding such cylinder and
a valve disposed in such valve chamber, a coiled
yieldingly resisting axial compression of said
spring in such spring chamber resting at one end
?uid-pressure sealing membrane as said units are
on such spring supporting shoulder and urging
coupled together.
9. Aconduit coupling comprising, in combina- , said valve toward said annular valve seat, and a
tion, a plug conduit unit including a tubular
tubular valve stem engaging said valve and ex
?uid-pressure sealing ‘membrane, therein; a
socket conduit unit readily attachable to and de
tending axially through both said annular valve
seat and said conical sealing element, said stem
tachable from said plug unit, said socket unit
including a tube extending into said plug unit ,
and having an internal annular seat withina
with said fluid inlet when said valve is spaced
from said seat, and a second conduit unit includ
' bore of said tube in the plug unit and engageable
by an external annular end portion of said tubu
, '
having at least one radial hole communicating
ing a tube and a rotary ferrule secured to said
tube, said tube being adapted to 'bt' axially in- ‘
serted in the third smooth surface portion of said
including cooperating means to prevent rotation 60 tubular shell, said tube having an internal con- .
ical seat adapted to ?t the free end- portion of
of said-tube-relatively to said tubular ?uid pres
said conical sealing element when said tube is in
’ sure sealing membrane when said external annu
serted axially into said shell, said tube having
, la: end portion engages said internal annular
' lar ?uid-pressure sealing membrane; said units
seat. .
10. A conduit coupling comprising, in eembl
nation, a‘ plug conduit unit including an elon
gated tubular ?uid-pressure sealing membrane
therein; a socket conduit unit readily attachable
to and detachable fromsaid plug unit, said socket
unit including a tube extending into said plug unit
and having an annular seat within the plug unit
engageable by an annular end portion of said
an internal annular _ shoulder axially engaging
said tubular valve stem against the force of said
spring with said valve spaced from said annular
valve seat, coacting anti-rotary telescoping means
associated with the fourth smooth surface of said
shell and said tube for securing said tube and
shell against any relative rotary movement to pro
tect said sealing element by keeping said conical
‘seat from turning‘with respect thereto, and co
acting locking means associated with said ferrule
tubular ?uid-pressure sealing membrane: said
units including cooperating longitudinally inter
and said shell adapted with said spring to secure
'
locking means to prevent rotation of said tube 75 said units axially together.
2,412,885
13. A ?uid pressure-sealed type conduit cou
pling comprising, in combination, a plug conduit
unit havingr a sealing member composed of anode
rubber to provide a ?uid-tight joint and a socket
unit having means cooperating with means on
said plug unit and acting to positively secure parts
of said units against relative rotary movement to
prevent injury to said sealing member.
14. A fluid pressure-sealed type conduit cou
pling comprising, in combination, a plug conduit
unit including a tubular shell having on the in
side of one end thereof a threaded portion, said
10
when said units are coupled; said shell being pro
vided with means for quick connection with said
ferrule to secure the units in coupled relation
against the force of said spring.
15. A conduit coupling comprising, in combi
nation, a socket conduit unit; a plug conduit unit
readily attachable to and detachable from said
socket unit; one of such units including a sub
stantially tubular casing and a tubular elastic
sealing element having one annular end thereof
secured in sealing contact with the interior sur
face of said casing; the other of such units in
shell also having a shoulder facing said threaded
cluding a tube having an internal annular seat
portion, a tubular sealing element composed of
within the bore of said tube, said internal seat
anode rubber having a ?ange seated on said 15 being constructed and arranged to surround and
shoulder, means engaging the ?ange of said seal
engage an annular external surface portion ad
ing element to provide a ?uid-tight joint, a valve
jacent the other end of said sealing element to
having a tubular valve stem extending into said
provide a ?uid-tight joint between said sealing
sealing element, said stem having at least one
element and said tube when said units are cou
radial opening adjacent said'valve, a spring urg 20 pled together; said units having cooperating in
ing said valve toward closed position, a nipple
terlocking means operable to prevent rotation of
threaded into said shell and engaging said spring
said tube relatively to said sealing element when
and permitting unrestricted fluid flow when the
said internal seat in said tube engages said ex
valve is open, and a socket unit including a tube
ternal surface portion of said sealing element.
and a rotary ferrule secured to said tube, said
16. A conduit coupling as claimed in claim 15,
tube being adapted to be axially inserted into
wherein a normally-closed valve is disposed within
said tubular shell to provide an annular ?uid
one of said units, and a tubular stem for actu
sealing contact with the free annular end portion
ating said valve extends axially through said
of said sealing element, and said tube also hav
tubular sealing element and axially into the bore
ing an internal shoulder for engaging and mov 30 of said tube.
ing said tubular valve stem against the force of
JAMES ARTHUR HOFFMAN.
said spring to open said valve to permit unre
SAMUEL R. OLDHAM.
stricted ?uid ?ow through said radial opening
WILGOT J. JACOBSSON.
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