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Патент USA US2412664

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mscn 17, 1946.
2,412,664
J. N. WOLFRAM ET'AL
coUPLING Eon TUBES
s> sheets-sheet 1
Filed May 20, 1944
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J. N. woLFRAívl ErAL
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-couPLING Fon TUBES
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Déc.l 17, 1946.
l J. N. woLFRAM Erm.
‘
2,412,664
. vcouPLING 'FQR TUBES
Filed May 20, 1944
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2,412,664
Patented Dec. A17, 1946 '
UNITED STATES PATENT OFFICE",
_
_ coUPLrNG FoR'TUBEs
John N. Wolfram and Walter Maky, Cleveland,
Ohio, assignors to' The Parker Appliance Com
pany, Cleveland, Ohio,- a corporation of Ohio
Application May 20, 1944, Serial No. 536,592
1 claims. ' (01.285-123)
i
The invention relates to new and useful im
provements in couplings for tubes and more par
ticularly a coupling which is adapted to securely
»
hold and seal a ilareless tube.
'
An object of the invention is to provide a cou
pling of the -above type wherein the tubeis
secured tov a body member by va threaded nut,
sealed by a gasket disposed in _a'recess within
ber for gripping vthe tube and collet for contract
ing the clamping member;
Figure 5 is a Viewv similar to Figure 4 showing
the’coupling closed and the tube gripped and
sealed;
,
y
Figure 6_ is a side view of the clamping Vsleeve
shown in Figures 4 and 5;
Figure 7 is an end view of the clamping sleeve
shown in Figure 6;
the ¿body member and adjacent the inner end of
8 is a longitudinal sectional view show
the tu'be and gripped by a, contractible member l0 ingFigure
a
slightly
modified form of coupling' and the
operated on by said nut and extending outwardly
use of two couplings and a body member for
lalong the tube from the end of the body member.
connecting two ends _of tubing;
I
A further object of the invention is to provide
Figure 9 is an end View of the coupling;
acoupling of the above type wherein the grip
Figure 10 is a View inside elevation showing
ping member is provided with spaced projec
the
coupling used for> repairing a >fracture in the
tions on itsinner face which ‘are embedded in ,A
tube.
`
the tube for gripping the same when the coupling
The invention has to do with a, coupling for
is closed.
'
_
tubes- and more particularlyl a tube which is of
A further object of the invention is to provide
uniform
diameter all the way to the end thereof alcoupling of the above type ywherein the grip 20 and commonly
referred1 toias a ñareless tube.
ping member-'is provided with longitudinal slots
The coupling as shown in iFigures 1, 2 and 3 »A .
extending from the outer end thereof inwardly
inclusive includes a body member l, a. nut 2, a
so as to facilitate the contraction of the gripping
clamping sleeve ortmember 3, a collet 4 which
member.
.
operates upon the clamping sleeve for contract-‘
A still further object of the invention is to 25
ing the same for gripping the tube which is provide a coupling of the above type wherein the
indicated at T. The coupling also includes a
gripping member is/contracted by a collet which
gasket 5 which is disposed ina recess in the body
is» forced endwlse along the gripping member by
member l so as to contact with the outer wall
the nut.
.
of the tube and the wall of the recess in the body
Another object of the invention is to provide 30 member.
The body member l is provided with
a coupling of the above type wherein the endwise
a bore i5 which is of substantially the same di
movement of the collet on the gripping memlber
ameter as the bore of the tube which is to be
is positively limited so as to prevent undue de
clamped to the body member. Said body mem
formation of the tube.
A .
’
as shown- in Figure 1 is counter-_bored at i
_These and other objects are in part obvious 35 ber
to form a seat for the end ofthe tube. This is
and will in part ybe hereinafter more iully dis
' a, positioning seat which locates the tube in the
closed. ,
,A
coupling and' centers it relative to the coupling.
in the drawings
The body portion is lalso provided with a thread ' ,
Figure 1 is a longitudinal sectional view through '
8 adapted to be engaged by a thread s on ,the
a coupling embodying the improvements with the to nut
2. The nutl is providedwith a recess in
parts in initial aßembled position;
which the clamping sleeve 3 is located. This
is
a
view
similar
to
Figure
1
but
show.
Figure 2
clamping sleeve 3 is formed with a solid head
ing the coupling closed and the tube gripped so
lll vas shown in Figure 3. Projecting outwardly
as to prevent endwise movement thereof in the
from
this head is the clamping portion of the
45
coupling;
sleeve. This clamping portion ofthe sleeve is
Figure 3 is an end view of the clamping mem
provided with a series of slots l I, four in number,
ber for gripping the tube and showing the slotsV
as shown in Figure 3. This makes the sleeve
which extend inwardly from the end of the
readily contractible in the region of the slots. 0n
clamping member for facilitating the contrac
tion of the same;
-
Figure 3a is a detail showing the deformation
of the gasket and the intimate contact of the
gasket with the parts of the coupling and the
tube caused by the ñuid pressure entering the
recess;
'
Figure 4 is a view similar to Figure l but show
ing a slightly modiñed form of clamping mem
50 the inner face of the clamping sleeve are ribs or
projections I2 and i3. These ribs or projections
are adapted to be embedded in the tube for a ilrm
grip between the sleeve and the tu
. The outer
-face I4 of this clamping sleeve is tapered so that
55 it is gradually enlarged from the outer end toward
the head I0. This clamping sleeve is made with
‘ < a very slight clearance so it may be readily slipped
2,412,634
_
3.
4
onto the tube. It is noted that the tapered outer
. also provided with inwardly projecting portions
face Il of the sleeve is spaced a short distance
from the solid head I0 and that the slots II
extend all the way from the outer end of the
clamping sleeve to the solid head I0.
when the coupling is closed. The clamping sleeve
The collet ñ is in the form of a solid sleeve,
the inner face of which is tapered substantially
on the same angle as the outer face of the sleeve
This tapered face of the collet when the colletl
or ribs I2 and I3 which are embedded in the tube
3 is formed with slots I I and the head I0, instead
of being solid as shown in Figure 3, is provided
with a slot 22. The' outer face of this head IU
of the sleeve is tapered as indicated at 23. The
inner face 24 of the collet 4 is tapered to co1'
respond to the taper 23 on the head of the sleeve.
is forced along the sleeve serves to contract the
When the coupling is closed this tapered face 24
sleeve and cause it to grip the tube. The nut
will engage the tapered face 23 on the sleeve and
2 has an inwardly extending part I5 forming a
will close up the slot 22, thus causing the head
shoulder I5. The opening in the outer end of the
of the sleeve to make tight contact with the tube.
nut is such that the sleeve 3 and the collet l5
The body member I has a recess 20 for a seal
extend outwardly beyond the nut. The collet 5
ing gasket 2l. 'I'he fluid under pressure will pass
into the recess 20 and bear against the gasket.
has a shoulder I`I which is contacted with by the
The gasket will be deformed into very firm con
shoulder I6 on the nut.
The solid head I0 is adapted to abut against
tact with the wall of the recess 20, the outer wall
the outer end I8 of the body member so that when
of the tube and the inner face of the head I0
the nut is threaded onto the body member the 20 of the sleeve. Inasmuch as the sleeve is con
collet will be forced along the sleeve and cause
tracted at the head thereof into tight contact with
the sleeve to be contracted as shown in Figure 2.
the tube, there is no chance for the gasket under
The inner end I9 of the collet ¿l is limited in
this fluid pressure to be extruded inbetween the
its movement by contacting the solid head I0
head I 0 and the tube and thus a very tight seal
of the sleeve which, as noted, abuts against the 25 ing of the tube is accomplished.
In Figure 8 a slightly modified form of coupling
outer end of the body member I. When the nut
is shown and the use of two couplings for repair
is turned onto the body member and the sleeve
is contracted, the projections or ribs -I2 and I3
ing a break in a tube is also illustrated. 'I'he
couplings are similar in construction and also are
' will be embedded in the tube, after which further
turning of the nut onto the body member will be 30 very similar to the couplings which have already
limited by the collet abutting against the solid
been described, and one _of these couplings will,
head of the sleeve. 'This prevents undue deform
therefore, be very briefly defined. The coupling
includes a body member I, a nut 2, and a clamping
ing of the tube.
'
.
'
member 3. As shown in Figure 8, this clamping
As a means for sealing the connection of the
member 3 is formed integral with the body mem
tube to the body member, said body member is
ber I. The clamping sleeve is provided with slots
provided with a recess 2li which opens into the
Il and _with ribs or projections I2 and I3. The
bore ofthe body member. As shown in Figures 1
outer face of the clamping member 3 is tapered as
and 2 this recess is formed in the inner end
indicated at 25. In this form of the coupling
portion of the body member. The gasket 5, nor
mally circular in cross section is placed in the 40 the nut directly contacts with the portion of the
sleeve that is to be contracted and the collet has
recess and when the tube is inserted the gasket
been omitted. The nut has an extended portion
is of such dimension that it will make a tight
26 provided with a tapered inner face 27.
seal with the wall of the body member and also
The body member I is provided with a recess
-a tight sein with the outer wan of the tube. The
coupling is particularly adapted for tubes in
20 in which is located a gasket 2I. The body
member I is elongated and serves as a body mem
which fluid under very high pressure is con
ber for both the coupling at the right and at
veyed. The fluid under high pressure will pass
the left in Figure 8. It is noted that these cou
the seat against which the tube makes contact
plings are similar in construction. The cou
and will enter the recess 2t and bear against
pling at the left is shown as initially applied to
the gasket and force the gasket into tight seal
the tube end and the coupling at the right is
ing contact with the tube, the solid head Iii and
shown as closed on the tube end. The coupling
the body member, as shown in Figure 3a. It will
_as illustrated in Figure 8 is particularly adapted
be noted that the sleeve can ñt the tube with only
for the repair of'v fractured tubes. In Figure l0
a slight clearance and therefore when the gasket
a tube is indicated at T. The tube was ruptured
is deformed by the fluid pressure thereagainst,
and the coupling is'shown as being applied for
the gasket will not be forced into the space
repairing the tube. The ruptured portion of the
between the tube and the clamping head of the
tube is cut out so as to leave two spaced ends
sleeve. It will also be noted that the grip of
' T1 andTß. The coupling, as a whole as illus
the clamping. sleeve is- well outward -along the
tube from the solid head and therefore the grip 60 trated in Figure 8, is slid onto the end 'I‘2 of the
tube. The tube may be sprung laterally out of
ping of the tube and deforming of the same -by
alignment with the end T1 of the tube to permit
the embedding of the ribs I2 and I3l into the tube
the coupling to be applied. After the coupling
will -not -disturb the initial shaping of the tube
l in the region of the gasket and the clamping
' has been slid onto the end ‘I’2 of the tube, the
head of the sleeve will retain its close position 65 ends are brought into alignment and the coupling
to the tube wall.
,
is moved to the right until it is engaged with ~
the end '1"l of the tube. The coupling as shown In
In Figures 4 to 7 the coupling is very similar
Figure 8' illustrates, on an enlarged scale, the
to that shown in Figures l to 3. 'I‘he coupling
includes a body member I and a nut 2, a clamp
connection of these two ends T1 and 'I'2 of the
ing sleeve 3 and a collet 4. The nut has a thread 70 tube. After the coupling has been placed, then
the coupling at one end is closed and then the
ed connection with> the body member and is
provided with a shoulder I6 which is adapted to
coupling at the other end is closed. 'I'his makes
engage a shoulder on the collet. The outer face
a very tight connection between the two ends of
of the sleeve is tapered to conform to the inner ' the tube and the repair is complete.
tapered face of the collet 4l. The inner sleeve is 75
Insteadof utilizing the specific form of cou
atrasos
5
pling shown in Figure 8, the coupling shown in
Figure l or Figure 4 may beused in the same
way for the joining of the ends of tubes- or
endwise of the sleeve for contracting the same,
the adjacent contacting faces between the sleeve
and the collet being tapered, the inner face of
repairing the same.
said sleeve having spacedl projecting ribs adapted
`
It is obvious that minor changes in the details
of construction may be made without departing
from the spirit of the invention as set forth in
the appended claims.
We claim:
‘
'
‘
l. A coupling for tubes comprising a body
member having a bore adapted to ~receive the
tube anda recess opening into said bore, a nut
having threaded engagement with said body mem
ber, a tube clamping member projecting out
wardly along the tube from said body member
and having slots extending inwardly from the
outer end thereof, means operated by said nut for
contracting said 'slotted end of the clamping
to be embedded in the tube and a gasket disposed
in said recess and adapted to make sealing con
tact with the body member, the sleeve head and
the tube.
ì
'
5. A coupling for tubes comprising va body
member having a bore adapted to receivethe tube
and a recess opening into said bore, a, nut having
threaded engagement with said body member, a
clamping sleeve having a head at the inner end
thereof adapted to abut against the outer‘ end of
the body member, said sleeve having a, clamping
portion extending outwardly along the tube from
said head with slots in said clamping portion ex
tending lengthwise thereof, the recess in said body
member being disposed at the end thereof and
member for gripping the tube and a gasket com
pletely housed within said recess and adapted to 20 closed by the head of said sleeve, a collet sur
make initial sealing contact with said body mem
rounding said clamping portion of thesleeve and
ber and said tube, said recess and bore being di
mensioned so that iluid pressure on the tube will
deform the gasket into tighter sealing contact
with the tube and the body member.
2. A coupling for tubes comprising a body
member having a bore adapted to receive the tube
and a recess opening into said bore, a nut having
threaded engagement with said body member,
having a shoulder engaged by said nut whereby
said collet is moved endwise of the sleeve for con
.tracting the same, the adjacent contacting faces
between the sleeve and the collet being tapered,
said collet being dimensioned so as .to engage 'the
Ahead of the sleeve for -limiting‘the contraction of
the sleeve and a gasket disposed in said recess and
adapted to make sealing contact Withthe body
' a clamping sleeve disposed within said nut and 30 member, the sleeve head and -the tube.
projecting outwardly from the body member,
said sleeve having slots formed therein, a collet
surrounding said sleeve and having a shoulder
engaged by the nut for moving said collet end
6. A coupling for tubes comprisingla body mem-,
ber having a bore adapted to receive the tube and
a recess opening into said bore, a nut having
threaded engagement with said body member,. a
wise of the sleeve'the adjacent contacting'faces 35 clamping sleeve having a head at the inner` end
of the sleeve and collet being tapered whereby
thereof adapted to abut against Ithe outer end
the movement of the collet onto the sleeve will
of the body member, said sleeve having a clamp-v
contract the sleeve into gripping engagement
ing portion extending outwardly along the tube »
with the tube and a gasket in said recess and ~
from said head with slots in saidV clamping por
adapted to make sealing contact with the body 40 tion extending lengthwise thereof, the recess in
member and said tube.
said body member being disposed at the end there
3. A coupling for tubes comprising a body mem
of and closed by the head of said sleeve, a collet
ber having a bore adapted to receive the tube
surrounding said clamping portion of the sleeve
and a recess opening into said bore, a nut having
and having a shoulder engaged by said nut where
threaded engagement with said body member, a
by said collet is moved endwise of the sleeve for
clamping sleeve having a head adapted to abut
contracting the same, the adjacent contacting
against the outer end of the body member, said
faces between the sleeve and the collet being
sleeve having a clamping portion extending out
tapered, said sleeve head 'having a slot there
wardly along the tube from said head with slots
through whereby it may be contracted, the outer~
in said clamping portion extending lengthwise 50 face of said sleeve head being tapered and the
thereof, the recess in said body member being dis
inner face of said collet being tapered and adapt
posed at the end thereof and closed by the head
ed to engage the tapered face of the sleeve head
of said sleeve, a collet surrounding said clamping
for contracting said sleeve head into engage
portion of the sleeve and having a shoulder en- \ ment with the tube and a gasket disposed in said
gaged by said nut whereby said collet is moved 55 recess and adapted to make sealing contact with
endwise of the sleeve for contracting the same,
the body member, the sleeve head and the tube.
the adjacent contacting faces between the sleeve
7. A coupling for tubes comprising a body mem
and the collet being tapered, a gasket disposed in
ber having 'a bore adapted to receive the tube and
said recess and adapted to make sealing contact ' a recess opening into said bore, a nut having
with the body member, the sleeve head and .the 60 threaded engagement with said body member, a
tube.
-
4. A coupling for tubes comprising »a body mem~ .
clamping sleeve formed integral with the body
member and extending outwardly along said tube,
ber having a bore adapted to receive the tube
and a recess opening into said bore, a nut having
said clamping member having longitudinal slotsl
formed therein and inwardly projecting spaced
threaded engagement' with said body member, a> 65 ribs for engagement with the tube, the outer face
clamping sleeve having a head adapted to abut - of said clamping member `being tapered and
adapted to be engaged by the tapered inner face
against the outer end of the body member, said
sleeve having a clamping portion extending out
of the nut whereby the threading of the nut onto
wardly along the tube from said head with slots _
the body member will contract said clamping
in said clamping portion extending iengthwise 70 sleeve into engagement with the tube and cause
thereof, the recess in said body member being dis
the ribs to be embedded in said tube, a gasket di.;
posed at the end thereof and closed by the head ` posed in said recess and adapted. to make'seaiing
of said sleeve, a collet surroundingsaid clamp
contact with the body member and said tube.
ing portionK of the sleeve and having a shoulder
'
JOHN N. WOLFRAM.
engaged by said nut whereby said collet0 ic moved
WALTER MAKY.
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