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Патент USA US2121624

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June 21, 1938.
I. cowLES
_ FLEXIBLE CONDUIT' CONNECTION
2,121,624
‘Filed Sept. 16, 1936
1/51 17/" '12,
W W”
_
V
\
‘
2,121,624 .
Patented June v21, 1938
UNITED STATES PATENT orFice f
2,121,624
FLEXIBLE CONDUIT CONNECTION
Irving 'Cowles, Detroit, Mich, 'a'sslgnor to. him
self and R. W. Lotz
Chicago, 111., as co- -
trustees
-
‘
Application September 16, 1936, Serial No. 101,091 r
3 Claims. (Cl. 285-44)
equipped at one end with an inwardly project
ing annular ?ange Ill having side walls extend- ,
The object of'the present invention is to pro
vide ?exible conduits for high pressure use, com
ing parallel with‘a vertical plane extending per
pendicularly
aid shell and the
inner diameter of which is substantially equal
to the outerdiameter of the ?ange 6 and which
posed substantiallyyof three normally and in
itially dis-assembled members which primarily
are disposed in partly assembled relative posi
is adapted to pass telescopically over the latter. '
tions and in primary engagement with an end
portionof a hose, and which, thereafter, are
The width of the ?ange I0 is substantially‘
forced into ?nal assembled relation for perma equal to, but no larger than that of the mout ‘
nently engaging the hose end in ?uid-tight re
lation to the. coupling elements vto complete a of the annular groove 5.‘
v10
The said shell 9 is, also equipped with a thread
10V conduit structure possessing certain advantageous characteristics hereinafter particularly formation II which extendssubstantially from .
pointed out.
'
-
Y
the mouth end portion 12 of said shell to a ‘
rI‘he present invention relates also to the point contiguous to but spaced from the ?ange
methodof effecting assembly of a structure of III. The said thread formation II is of rela- 15
15'
the type above indicated.‘
‘
' ' -
"' y'
tively steep pitch so that-it is adapted to receive
The conduit structure and the method of making the same are illustrated in the accompany-
'
and engage a wire helix i3, as shown. The helix
I3 is of less length than the said thread formation
ing drawing, wherein: .,
Fig. 1 is ‘a fragmentary vview comprising a
20 s1de elevation showing a stem of the body mem-
ll of the coupling shell.
‘
The coupling of the present invention is par- 50
ticularly designed and adapted for engagement -
_ ber of a coupling and a central longitudinal
with the type of'?exible conduit or hose, the
a sectional view of a coupling shell, a hose end
wall of which is equipped with one or more an
portion, and ?exible means within the coupling
for engaging the hose end portion, all construct-
'
nular reinforcing sleeves composed generally of
braided wire. In the instance illustrated, the 25
'25 ed in accordance with the invention, and show-
hose or conduit I4 is equipped between the inner' '
me said respective parts ‘m their relative initial tube iii, of rubber, and its outer jacket or wall
positions prior to eifecting assembly thereof.
, portion, with a plurality of said reinforcing‘
Fig. 2 is a central longitudinal sectional view sheaves “i, as shown in Figs_ 1, z and 3,
_ showing the respective parts of the ultimate con-.
The outer jacket, of the hose end 14 15 cut 80
'duit structure disposed in the next succeeding
annularly radially down to the outermost of said, .
relative positions constituting a‘further step in
the method of this inventmn-
‘
'
reinforcing sleeve “3 thereof at a point, Spaced
‘ appreciably from an extremity of the hose end,
Fig' 3 ‘illustrates .the respective elements as
shown in Fig- 2 in ?nal assembled relation "1°
the‘ portion of said jacket between said annular
incision and the extremity of said hose being.“
ea'ch other"
peeled oil so as to expose the outermost of said .
'
‘
'
_
_
Fig‘ 4 is a’ fragmentary seclmml new of the
reinforcing sleeves l6, and also to provide an
coupling'body taken on'the hne ‘"4 of Fig‘ 3- ' annular shoulder H at one end of the said
‘
.40.
Fig. 5 is a transverse sectional'view of the
coiIiplmg
boidy takienttone the
use 5-5 ofv Fig- 4' n carry ng Du
nven on’ I provide a
exposed portion_
.
>
-
The operation of removing this portion of the ‘o
jacket of the hose is commonly termed “sklvlng"
.
,
portion will be re
coupling body I, which, in the instance illus- ‘and therefore the said end
,
trated, is equipped with a hexagonal end por- f
d t h l
m m d
d
n
1
tion 2; an‘ internal thread 3, a central stem 4, >erre
° eren as
e 8 ve en For on o.
4,5
and an annular groove 5 adjacent one end there-4
the hose end‘ .
annular Shoulder -|_
tremlty of the hose a distance appreciably less
6f bordered by an annular ?ange 5 and an
>
‘
‘
~
The Side walls of the groove 5 are ?ared as
shown clearly by Figs. 2 and v3, except at two
j diametrically opposite areas 8',‘ shown in Fig_ 5,
said side walls are rendered parallel with
1 where
each other
and‘ with ‘a vertical plane perpen' dicular t'olthe longitudinal axes of the coupling
body.
'
-
'
-
vThere is’ also "provided a coupling shell 9
-
'
The said shoulder I1 is spaced from the ex
45
than the length of the ‘coupling shell 9 and said
skiveFl end P°rt1°n 15 of appreciably smaller d1’
ameter than the inner diameter of said coupling 50
Shell 9-
,
The gauge of‘ the wire 'of which
the helix l3
is composed is such that said helix, when en
gaged. in the thread formation ll- of the shell
_9, will proje
ct inwardly ‘from the
‘
inner surface 55,
2
2,121,624
of said shell 9 sufficiently to practically snugly
?t the skived end portion of said hose end.
In effecting assembly of the several aforesaid
elements, the helix I3 is ?rst mounted upon the
skived end portion of the hose with one end of
the helix disposed in contact with the said annu
of the hose, but is ineffective to prevent With
drawal of the hose end from the coupling.
It will be obvious from the foregoing descrip
tion that variations in diameter of the reinforc
ing sleeves of the hose will be easily compen
sated for by employment of helices l3 composed
Said helix is appreciably shorter [of
wire of a gauge adapted to compensate for
than said skived end portion.
the same.
'
After
said
helix
has
been
disposed
upon
the
10
_ The advantages incident to _ the present
skived end portion of the hose, it is threaded into
structure are ?rst, avoidance of distortion of the 10
engagement with the threads of the shell ,9 si
multaneously with the insertion of the hose end helix, and second, the accomplishment of itsv
into said shell until the, hose end and helix gradual partial embedding into the reinforcing
shall attain substantially the position shown in sleeves l6 of the skived end portion of the hose
Fig. 1.
while at the same time the inner tube I 5 of the
lar shoulder ll.
After this has been accomplished, the stem
4 of the coupling body I is forced into the inner
tube of the hose end as shown in Fig. 2, thereby
hose is compressed gradually and always toward
its inner extremity. This causes the soft mate
rial of which the inner tube is composed, together
. expanding said hose end appreciably and thus -with such soft displace'able material as may lie
20
also effecting an appreciable shortening of the between the several sleeves IE, to build up a very
latter.
>
compact ‘seal against the shoulder l8 of the body
This shortening permits the ?ange 6 to attain member, it being obvious further, that the’ cross
the position within the shell shown in Fig. 2 and sectional shape of the wire of the helix I3 is
causes
the extremity of the hose to abut the such as to preclude cutting, through the rein
~25
annular shoulder I 8 at the inner end of the stem forcing sleeve IS. The distortion of the ‘latter
4.
.
'20 .
effected by partial embedding of the helix I3
.
The coupling shell 9, while disposed in the posi
tion shown in Fig. 2, is contacted progressively
30 from its mouth l2 over'its entire length to de
crease its diameter to the extent necessary, to
cause the cylindrical face of the ?ange 6 to en
gage the inner cylindrical face of the shell '9
end being forced or pulled out ofv the coupling
shell after permanent assembly has been effected
as hereinbefore described.
.
I claim as my invention:
1. A hose coupling comprising a body ‘member.
and force the ?ange ID of the shell I into the
groove 5 of the coupling body.
25
into the same prevents all possibility of the hose
30
a cylindrical contractible shéll equipped with an
internal thread formation, a'helical wire mem
This contraction is effected by forcing the shell _ ber of less length than that of said thread forma
through the ?ared opening of a suitable die, such ' tion disposed within said shelland in engage 35
as is illustrated and described in Letters Patent ment with said thread formation, throughout
substantially all except the innermost end por
No. 1,752,976, the opening whereof is of the max
imum diameter equal to the desired [reduced tion of the latter and adapted to embrace a hose
40
outer diameter of the shell. The force ‘employed end projecting into said shell to greater depth
35
is sufficient to cause the said ?ange ID to be dis
" torted to ?t snugly the ?ared portion of the an
nular groove’ 5, while said ?ange I 0 will nor
mally
engage the ?at surface portions 8 of the
45
groove 5 shown in F?g. 5, the latter cooperating
with said portions of the ?ange l0 engaged
therein to prevent all. relative rotation between
the coupling body and the shell 9, said shell be
'50 ing also’ obviously held against longitudinal
movement relatively to the coupling body.
The contraction of the sell throughout its
length to the last-mentioned diameter effects a
progressive contraction of the helix l3 from its
end portion, where it- abuts the shoulder
55 outer
I1 of the hose end. and such
_
contraction causes ‘
a progressive elongation of said helix so that as
the latter becomes partially embedded in the
reinforcing sleeves iii of the hose end, it also
engages a greater length of the latter and of the
thread formations ll of the shell 9.
-
Following the'initial contraction of the shell
9 as above described, the same is preferably still
further contracted progressively from its mouth
65 to its inner end portion, as shown in Fig. 8,
thereby effecting
a still further contraction and ‘
elongation progressively of the helix I 3 which is
then positioned as shown in Fig. 3.
-
-
-
' Themouth portion of the shell 5 is ?ared as
70 illustrated in Figs. 1, 2, and, 3 ‘and, preferably,
the thread formation I I is cut through the ?ared
portion wherein it vanishes.
_
As much of the thread formation as lies within
' .the' ?ared portion of the mouth of the shell
75* serves merely to engage the rubber outer jacket
than said wire member to be permanently en
gaged with said coupling, the said shell adapted 40
to be contracted progressively from its mouth to
its inner end portion thereby to progressively
contract said wire member into firm engagement
with the hose end and progressively elongate. said
wire member from its outer to its inner extremi 45
ties during said progressive contraction of the
hose and cause the latter to engagea correspond
inglyv ‘greater length ofqsaid'hose end portion
lying within said she'll.
.
'
.
‘
2. A-hose coupling comprising a bodymember 50
equipped with a central stem- for- engagement
within a hose end and a contractible shell forv
receiving the hose end, ‘said shellequipped inj
ternally 'witha thread formation extending sub
55
stantially from ‘its mouth to its innermost end
. portionha wire helix of less length "than said -
thread formation snugly
engaged ‘ within the
same from the front end portion thereof to a
point adjacent its rear end and adapted to .em
_
brace said hose end, whereby upon contracting
said, shell’ progressively‘ from its mouth to-its
\rear end portion, said helix-will be contracted
and elongated progressively to 'engage in the
outer surface of the hose end throughout a length 65
greater than the initial length of ' said helix,
distortion of the latter during contraction of, the
shell being preventedby its elongation.
'
3. A hose coupling'including'a body portion
equipped adjacent one end portion thereof with
an annular-external groove, va contractible cou
pling shell equipped at one end with an inward
ly projecting annular ?ange engaged in said
groove by initial contraction of said shell over
a,1a1,oa4
4
'
v
3
its entire length, said shell equipped internally posed vwithin the latter and said shell prior to
with a thread formation extending from its said contraction of, the latter whereby the wire
mouth portion to a‘ point adjacentthe coupling 7 helix is caused to become partially embedded‘ in
body, a wire helix of less length than‘ said said hose end upon said contraction of said shell,.
thread formation and of a diameter ‘initially to
Ca ?t said thread formation Prior to Said contra-6r
the latter heing'further contracted from its '5
mouth portion to its inner end portion following
‘
tion of said shell and initially contracted and said initial contraction thereof thereby effecting
elongated by contraction ofsaid shell, a hose endv additional contraction and elongation of said
portion of an outer diameter substantially equal
10 to the initial inner diameter of said helix dis
wire helix,
L
' ’
'
. COWLES.. .
IRVING
10
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