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Патент USA US2136230

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NOV. 8, 1938.
2,136,230 “
Filed Nov. 27, 1936
. J@. 2. ~
% Æm/ ÆWwW.
Patented ‘Nov. 8, 1938
Michael Berman and William Brockner, Bu?alo,
N. Y., asslgnors to Bewitt Bubber Corporation, .
' Application November 27, 1936, Serial No.112,852
_ 2 ,C‘lahäm.
-(Cl. 138-49)
‘This invention relates to improVements in mul
Fig. 6 is a, fragmentary
. tiple passage hose. This application is in part
a- continuation of'our pending application‘Seriai ' ..the ?nished hose.
No. 73,457 ?led April 9, 1936, now Patent
. 2,122,335 01’ June‘ 28, 1938.
In many instances, it is desirable to deliver
two or more ?uids from di?ferent sources to a
common delivery point,’ as for example in the
case of oxygen and acetylene gases‘, hÿdrogen
‘'10 and oxygen gases, or other gases which may
be used l'or welding or heating, and which are
conducted from separate tanks through -h‘0se
to ‘the point at which combustion takes place.
Similarly in ?re extinguishing, dilut‘e sulphuric
“5 ‘acid and sodium carbonate solutions may 'be
conducted from separ‘ate sources through sép
arate'hose to a common discharge point. Under
_ such conditions. it is desix‘able to have two or
20 more parallel Iengths oi' hose joined into a sin
gie hose with separate passages for the di?erent
?uids. In connection with most of these uses, it
is also essentiel that the hose be of a strong and
rugged construction,v such for example as a tab
transverse s'ectionbi
Fig. 7 is a fra2meniäary transverse section 'of a
mold in which the hose is vuicanized.
4 _
Fig. 8 is a fragmentary perspective view of an 5
end portion of the multiple passage hose em
bodying this invention.
Our ?nproved reinforced multiple passage hose
includes two or more. inner tubes il! arranged
side by side in spaced relation to each other. ~îl0
Ea‘ch length of tubing lo may. if desired, be cov
ered on its exterior surface‘with a layer of rubber
cement H and a layer of iabric reinforcing i2
is ,applied, in any suitabie manner, either by
wrapping the tubing with canvas or by braiding '15
a cord reini‘orcement about the .tubing. [5 rep
resents the outer layer or covering of the hose
which is so i'ormed that, the covering surround-'—
_ing one or the inner tubes i0 is formed integrai
with the covering 01’ an adjacent inner tube in.
The inner tubing io may be produced in any
usuai or suitable‘m’anner, for example, by means '
of a suitable extruding machine. After this tub
ing has been extruded, for reasons heteinafter
One of the objects of this invention is to more
explained, the tubing may be semi
provide a multiple passage hose provided with cured i’uily
a fabric reiniorcement and having a single place ample, with the usual mariner, for. ex_
25 ric reinforced h‘ose.
01.’ outer covering commun to both passages of
30 said hose. Another object is to provide a hose
of this kind in which a plurality of lengths of
. In the manufacture of hose (Îf7 this kind of suf— ' '
?cient strength and durability, it is necessary
that the fabric be secureiy united with the'in‘- 30
hose are arranged side by side and joined along ' net tubing l0. Because of the necessity for hav-:
an ed€e so that the outer rubber covers et the 'ing the inner tubing rel‘atively stii1’, for example,
seVerai hose are integraily connectedv ‘and so by semi-curing the inner tubing, di?îculty is en
that the inner portions of the hose will be cen- - countered il! it is attempted to manufacture this
35 trally located with reference to the oùter cover
ing. Another object is to provide a hose in which
a layer oi’ ruhber cement is provided to‘i’orm a~
connectlon between the inner 'tubing and the
40 fabric of the hose. Other objects of the inven
tion will appear from the follow‘ing description
and claims.
In.the accompanying drawins:
Fig. 1 is a transverse section of a hose enibody
45 ing this invention.
\ ,
Fig. 2 is a transverse section of the inner tube
Fig. ‘3 is aJragmentary elevation, ‘partly in
section,îàÿhowing an inner tube with the cement
50 and 1’abric applied thereto.
Fig. 4 is aptransverse section thereoi. on line
hose in the mariner hereinbei’ore customary for 35
. the reason that the relatively sti?' or semi-cured
rubber tubing does not. during vuicanization un
der pressure, 1‘eadily ?ow into or t_hrough the in
terstices of the fabric. Consequentiy, for this
purpose we may, ii desired, apply around the ‘40
tubing il a thin layer of any of the suitable and
well known rubber cements. This may be done
by passin‘g the tubing through a solution of the‘
. liquid rubber cement bei’ore the fabric rein
iorcement is applied. Consequently, this cement 45
bonds ltself securely to the semi-vulcanized tub
ing _lil and also .penetrates through the fabric
i! which la applied about the tubing l0. After
the‘ fabrlc has been applied, the tubing ispassed
thr‘ough un extruding machine and the outer 50
covering Il is éxtruded about the fabric-rein
iorced inner tubing il). 'I’hrough this extruding
Fig. 5 is a i’ragmentary transverse section, on‘; machine.
either ‘a single length of iabric rein-L
an enlarged scale. of the hose tubing, fabric and
forced tubing il! ia passed, 'or ii-desired, the ex
55 cementshowninFigs.8and4.'
' 4——4, Fig. 3.
ti‘uding die may be iormed to receive two or more 55
lengths o! fabric reinforced tubing l0 arranged
side by side and the outer covering l5 may be ex
truded as a single place extending around both
of the adjacent iengths of fabric reinforced inner
of streng‘th equal to that of corresponding single
passage hose, we have formed our multiple pas
The vulcanizing of the hose may be done in
sage hose by ?rst semi-vulcanizing the inner tub
ing l°, which hardens the same so that it will
not readily ?ow toward the opening or connec
tion between two cavities in the mold plates or
become deiormed. This semi-curing of the im..
any suitable or desired manner. As shown in Æubing resulted in di?iculty in forming a Droper
Fig. 7, a vulcanizing press is employed having a bond between the inner tubing and the fabrlc
pair of mold plates 20 and 21 which are secured
10 in heat conducting relation to steam platens 22
and 23, one of which is movable relatively to the
other. The extruded hose is laid in lengths in
the grooves or, cavities 24 of the platen press as
shown in Fig. ‘7, while the mold plates are sep
15 arated. It will be noted that the mold plates are
provided with connected or communicating
grooves or. cavities 24 for receiving the adja
cent lengths of hose. If these lengths have been
extruded separately and are entirely covered
about their peripheries with the usual soapstone
or talcum, the adjacent portions of the tube
lengths of hose are cleaned in any suitable man
reinîorcement, since the semi-curing hardens the 10
rubber of the inner tubing to such an extent that
it will not ?ow into or through the interstices of
the fabric. This dii?culty, however, we have over
come by applying about the semi-cured inner
tubing a layer or coating of liquid rubber cernent. 15
Consequently, when our improved multiple pas
sage tubing is cured in a vulcanialng press, the
hardness of the semi-cured rubber of the inner
tubing Il! prevents this tubing from becoming dis
torted out of circular cross section in the mold
cavities when subjected to internal pressure, and
the rubber oement forms a very secure‘ bond be
ner to remove the soapstone, so that the covering
tween thé inner tubing, the fabric reiniorcement,
layers of the two adjacent lengths will adh€re to
each other and will aiter vulcanization become
integrally connected. The movable platen is then
moved toward the ?xed platen so that the mold
plates 20 and 2! are in contact, as shown in Fig.
and the outer covering l5, so that the resulting
multiple passage hose has the inner tubing l0 cf
correct circular form and centrally located in the
8, so that the vulcanization of the hose can pro
During this vulcanization, the adjacent
leng’ths of hose are ?lled With air or water under
pressure. as is customary in vulcanizing single
passage hose, except that when .using semi-vul
canized or partly cured inner tubing, we increase
the pressure in the tubing from 100 to 150 pounds
par square inch. This internal pressure drives
covering l5. Consequently, the multiple passage
hose embodying our invention bas a strength or
resistance to lntemal pressure equal to that of
single passage tubing of similar size. The mul 30
tiple passage hose has the further advantages
that the tendency of the same to snarl and coil
when used is very greatly reduced and the knot
ting of {one length of hose about another is en
portions of the outer surface of the inner tube
into the braid or fabric, and with the aid of the
cernent, the inner tube becomes securely attached
to the fabric. During the vulcanization, the heat
40 wlll cure the outer coverlng IS 01 the hose and
complete the curing of the inner} tubes Il). The
rubber cernent, which forms a. layer around ea0h
inner tube l0, securely bonds the inner tubing
to the fabric reinforcement and the outer cover
ing l5.
In the manufacture of single passage hose, the
grooves or reœsses in the mold plates îorm con
tinuous walls extending completely around the
portions of the hose located within the mold
50 plates, and no di?iculty has been experlenced in
maintaining the inner tubes in central relation to
the hose, and consequently, it was not found nec
essary in connection with the manufacture of
single passage hose to semi-vulcanize or other—
55 wise stii‘len the inner tubing of such hose. In
the manufacture of multiple passage hose, bow
ever, the recesses in the mold plates which re—'
ceive the hose do not extend around the entire
periphery of each portion of the hose, and con
60 sequèntly, because of the open or connecting por
tion between two adjacent grooves or recesses
of the mold, the inner tubing‘ is not conflned in
central locations in the gro0ves or reCasses. Thi8
inner tubing. when containing air or water under
65 pressure. tends to become deformed and to enter
into the connecting portion of the recesses or
grooves of the mold. 'I‘hls deiormatlon weakens
the hose for the reason that the outer coverlng
l5 will be 0l.’ dii‘terent thiclcnesses at di?erent
portions thereoi and the deformatlon of the inner
tubing may also interiere with the free flow of
?uids through the hose.
in order to overcome this dl?lculty and to
maire it possible to produce multiple passage hose
tirely prevented by i’orming these two lengths into 35
a single pieoe. When the hose has two passages
and is formed of a ?gure 8 shape, it. also tends
to lie ?at on a ?uor or supporting surface and
there is, consequently, less tendency of the hose to
roll or twist.
Hose of the kind described has the advantage
that its length is not limited by the length of
the vulcanizing press, since the hose can be ad
vanced through the press after each vulcanizing
operation, so that a hose of any length can be 45
vulcanized step by step.
In the ?nlsbed hose, the ends of the hose may,
if desired; be formed by having the outer cover
separated at the ends to form short lengths of
single passage hose, which can be read?y con
nected to the receiving or discharge devices With
which the multiple passage hose cooperates.
These single passage ends may be formed by
simply slitting or cutting the multiple passage
hose lengthwlse with a knife to the desired dis
tance from an ‘end of the hose, or, if the hose is
formed connecting separately extruded single
passage hose, by leav‘lng the soapstone between
the end portions et the hose so that these end
portions will not become vulcanized together.
II desired the separate or single passage ends
21 and 28 of the hose may, at the point at which'
they are _integrally connec’œd, be provided with
a. band of any suitable form to prevent‘iurther
sepärating 01 the two lengtbs oiî hose and to pre 65
vent tearlng of the cover of the hose at the end
of the out or separation. As illustrated in Fig. 8,
this can easily be done by placlng about the hose
a metal baud 2! which initially may be made of ‘
elliptical or‘ other suitable form so as to pass
easlly over the multiple passage hose and the
portions of‘this band at the juncture of the ad
jacent lengths of hose are pressed inwardly by
means of a suitable die or implement to form
grooves or depressions 30 at opposite sides there
01’, which enter into corresponding grooves or
depressions between adjacent leng’ths oi' hose. thereot being slmultaneously vulcanized together
pressure into a uniform, unitary and re
The formation of these depressions in the band under
sllient body.
, '
29 also causes this band to contract about the
hose so as to be securely held in place thereOn_
2. A single-piece multiple passage hose com
Any othe'r means for reinforcing the hose at ,prising a. .plurality of fab’ric reinforced‘ rubber,
tubes arranged slde by slde and spac‘ed apatt, one
the juncture of the separated ends with the in
tegral connection between adjacent lengths may 01’ said tubes being provided for each passage et
be provided.
sacld hose, the fabric reinforcement of each tube
10 Whlle the hose shown ineludes only two lnner ' extendlng completely around the passage, and a
tubes or pass‘ages, it will .be understood that 11: single outer cover of rubber l'or said plui-ality of 10
IS not intended to limit this invention tu hose tubes, arranged to form a layer of substantlally
having two passages, slnce obviously threè or unitorm thicknes5 about each tube and securely,
bonded to each tube, said cover including an in
more lengths of tubing may be integrally con
ne“cted by means of the outer coverlng as herein tegral connecting part of substantial thickness
formingr a. connectlon between adjacent lengths
We clai_m as our invention:
of covered tubes and which extends over mate
rially less than one-fourth of the periphery of.
1. A single-plece multiple passage hose com-,
prising a plurallty of fabrlc reinforced rubber . each of said connected covered tubes and forming
tubes arranged si‘de bÿ side and spaced apart, longitudinal grooves between adjacent covered
one of said tubes being provided for each passage
of said hose, the fabri‘c reintorcement oi’ each
tube extending completely around thè passage,
and a. single outer cover of rubber for .said plu
rality et tubes, arranged to form a layer of sub
stantially uniform thickness about each tube and
securely bonded to each tube, said cover includ
ing an lntegral connecting part of substantial
thickness forming a connection between adjacent
tubes, thé cover at an end of said hose being
formed about each tube independently of an ad 20
jacent tube wlthout said integml connectlng part,
whereby the ends of the connected tubes are dis
'connected from each other at an end of the hose,
and a metal baud extendlng about said hose at
the juncture of. said disconnected ends with the 25
integnæl connecting part, Said baud belng of an
endless piece of metal, and having recessed por
‘lengths ofcovered tubes and which extends over tiens bent into sald longitudinal grooves to con
tract sald baud into tightly grippihg engagement 30
materially less than one-i’ourth 01 the periphery : with
said hose.
of each of said connected covered tubes, all of
sald parts of sald hose at any transverse section
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