An Improved Hose-coupling.
Year: 1892

page_text: Date of Application, 10th Dec., 1892-Accepted, 18th Feb., 1893
An Improved Hose-coupling.
GERHARD TERLINDEN, of Oberhausen, Rhenish Prussia, in the Empire of
Germany, Manufacturer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained in.
and by the following statement :-
This invention relates to an improved hose-coupling wherein, for pressing the
joint surfaces together, I use a bayonet-joint which can be easily disconnected and
has hook-shaped projections forming lugs, which, at the same time, enable the
fixing of the parts in the locking position to be automatically effected.
The said invention comprises essentially two modes of constructing this hose-
coupling, one of which (designed for hoses of comparatively large diameter)
possesses an advantage as compared with the other, which is simpler in form, in
that the halves of the coupling are arranged so that they can turn independently or
loosely over the socket of the hose. The said invention also comprises further
improvements in hose-couplings of the specified kind, such as the arrangements
hereinafter described and having reference to the special construction of the india-
rubber rings in the front faces of the sockets of the hose, their object being to cause
the locked hose-coupling to be tightened again by means of the internal pressure of
the liquid itself.
In the accompanying drawing,
Figure 1 is an elevation of the improved hose-coupling with loose coupling-rings
which are represented in the position in which they are engaged.
Figure 2 is a longitudinal section of the said hose-coupling with a partial view of
one (the right hand) socket of the hose, in which, by the breaking off of the metal
and india-rubber at the front surface, the annular tightening chamber behind the
india-rubber ring is rendered visible.
Figure 3 is a perspective view of one half of the coupling shown in Figure 1.
Figure 4 is a detail section through the front edge of a socket of the hose
(according to Figures 1, 2, 3), above which a piece of the tightening ring is also
represented in section.
Figure 5 (to which the section Figure 6 belongs) is a perspective view of a
socket of the hose which is directly connected with the coupling-lugs, thus
obtaining a modified or simplified construction of the improved new hose-coupling,
for which in
Figure 6 is illustrated a modified arrangement of the india-rubber packing
device.
In order to explain the principle of the improved coupling device, I refer in the
first instance to the simplified construction of Figure 5. The fluted or corrugated
coupling-socket u over which one part of the hose is drawn, is provided, in proximity
to the front surface covered with an india-rubber ring v, with the opposite lugs g,
by the side of which are arranged the supplementary lugs g¹. Between these
lugs g, provided with rounded or arched under surfaces, are thus produced notches
which effect, in the manner hereinafter described, the fixing of the coupling in the
locked position. By the side of the lugs 7, 9 are also arranged opposite to each
other the hooked arms » in such a manner that they project beyond the front joint
surface, and the inwardly turned arched hooks are at the same distance from the
axis of the socket or tube as the lugs q, q. It is obvious that if, against this
socket, is placed a second similar socket with alternately arranged lugs 9, 1' and
hook-shaped lugs p, the parts which couple are, in the first instance, brought to
such a position that they are ready for mutual engagement, the hooks being placed
.מ
017

page_text: in openings by the side of the lugs, and the engaging edges of the latter being
somewhat behind the plane of the engaging edges of the hooks. If then the halves
of the coupling or the sockets fitting together are turned in opposite directions, the
lugs and hooks come into engagement so as to lock the parts of the coupling
together. In such partial turning of the sockets, by reason of the combined action
of the surfaces on the coupling parts (q, q' or p), the front surfaces of the sockets
of the hose are pressed firmly together so that the tightening rings (v) yielding
in the direction of the movement are tightly pressed one against the other. In
a terminal position, the hooks p, as soon as the swelling parts of the engaging
surfaces sliding one upon the other are passed, will rest in the recesses or notches
between the lugs q, q', whereupon the locking of the coupling is complete. The
respective terminal position of the hook p at the side of the lug g is represented by
dotted lines in Figure 5.
The above described coupling device is employed with a slight modification in
the hose-coupling shown in Figures 1, 2 and 3. The engaging notch, as shown in
Figure 3, is arranged in this case between the hooks c', of the hooked arm
marked whilst the engaging lugs d are simple; 92, 92, Figures 1 and 3, indicate
stops which limit the partial turning movement whereby the two halves of the
coupling belonging to each other can evidently be pressed together in the manner
above described. In this case, each of the lugs d would, when the parts are locked,
occupy the position shown by dotted lines in Figure 3, relatively to the respective
hooked arms c.
of
The coupling parts, as shown by the section in Figure 2, are not immediately
connected with the sockets a of the hose, but form portions of separate coupling-
rings or muffs . Each coupling-ring embraces the socket a of the coupling
behind a flange a¹ thereon in such a manner that the parts are drawn in opposite
directions in the coupling. Displacement of the halves of the coupling upon the
sockets of the hose to the rear is prevented by an expanding-ring i which is held in
an annular groove in the socket and serves as a stop, behind the carrier flange
the coupling-ring. In the above described manner the independent turning
movement of the halves b,b of the coupling is rendered possible on the sockets a, u
of the hose, such as is suitable for comparatively thick and therefore less yielding
hoses, the flanges h, consisting of india-rubber and provided on the rings b, cau
be conveniently taken hold of by the hand to effect the turning movement to
the locking position.
The hoses are connected with the sockets a by means of band-rings or clamping
devices or in any other suitable manner.
The transverse section of the front edge of each (metallic) socket is shown
in Figure 4, and upon this front edge, which is provided with an annular groove e,
is placed the india-rubber packing-ring f shaped in transverse section as shown
in Figure 4, so that an inwardly projecting part of the same engages, after the
manner of a hook, with an outer groove in the body of the socket, Figure 2.
A. lower projecting part f' on the inner surface of the india-rubber ring fits
into the annular groove e which is thereby partly filled up. Into the annular
chamber which is thus formed by this groove e, leads several channels g extending
from the interior of the pipe, so that fluid under pressure can pass from the hose
behind the ring and exert a pressure for the re-tightening, which is supplemental
to the pressure for the tightening effected in the above described manner by the
coupling device. Therefore the stronger the pressure of the fluid passing through
the hose-coupling, the more secure is the joint between the adjoining india-rubber
rings f.
A modified form of construction of the india-rubber joint designed to be tightened
by the fluid-pressure, is represented in Figure 6, which is a sectional view of
Figure 5. The india-rubber ring has a transverse section which is undercut to a
taper-form at its periphery, so that a ring part of nearly triangular shape in
transverse section is formed; with the annular groove thus produced engages an

page_text: inwardly turned hooked flange or mouth
part of the socket, which is likewise made
taper for the reception of the taper part of the india-rubber ring. The widened
front surface of the india-rubber ring fixed interiorly in the above described
manner, or of the part v', must project a little beyond the outer edge of the mouth
of the socket. Suppose the india-rubber rings on both sides to abut against each
other in the locked position, each interior pressure which occurs must cause a radial
expansion of the front parts o¹ of the rings, which are only in connection by a thin
yielding bridge-piece with the main body of the india-rubber rings. As this
expansion can only take place with displacement to the outside on the taper surfaces
of the orifices (towards their outer edge), this causes a forward movement of the
india-rubber surfaces in opposite directions, which aids in the augmentation of
the pressure for the tightening. In Figure 6 the position of the india-rubber ring
when extended is indicated in dotted lines.
By means of the india-rubber rings which are taper to the outside, I obtain,
therefore, the same object of the automatic re-tightening action, as is realized
by the use of the india-rubber rings placed in annular channels as shown in
Figure 4.
Amongst the advantages of the above described hose-coupling device with the
coupling hooks turned inwardly and the engaging lugs, as compared with other
couplings to be similarly locked by a partial turning movement, may be mentioned
that the working parts are readily accessible for cleaning purposes and that no
spaces are produced in which dust and dirt might collect.
As the upwardly turned lugs do not require a special projecting carrier-flange
to be provided on the outside, the outer periphery of the coupling will be
comparatively small, whilst the projecting carrier-arms c, Figure 3, of the hooks
can be given a sufficient thickness.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is :-
First. A hose-coupling wherein the sockets of the coupling are provided on
the one hand with projecting coupling-hooks arranged in pairs, and on the other
hand with engaging lugs which project outwardly beneath the joining orifices in
order to be brought into engagement after the manner of a bayonet-joint, the
pressing together being rendered possible by the arched formation of the engaging
lugs and the yielding of the india-rubber rings at the joint-surfaces, and depressions
in the hooks or lugs on the other side of the swelling parts effecting a fixing
in the locked position, substantially as hereinbefore described.
Second. The modification of my improved hose-coupling in which the coupling-
hooks and lugs are provided directly on the sockets of the hose, substantially as
described with reference to Figure 5.
Third. The modification of my improved hose-coupling in which the coupling-
hooks and lugs are arranged each on a coupling-ring which is adapted to be
loosely turned upon the front end of each socket of the hose, substantially as
described with reference to Figure 3.
Fourth. In a hose-coupling of the kind or class hereinbefore referred to, the
device for effecting a re-tightening of the locked hose-coupling by the fluid-
pressure, consisting of india-rubber packing-rings which, projecting over the
outer edges of the sockets, are fixed each in front of an annular groove e in the
front surfaces of the said sockets, in order to be forced forward by the fluid-
pressure which passes through channels g from the interior of the sockets to the
said annular grooves e, substantially as described with reference to Figures 2 and 4.
Fifth. The modification of the re-tightening device in which the packing-rings
are constructed each with a front ring which bears against a funnel or cone-
shaped extension of the mouth of the socket, and which is expanded by the
internal fluid-pressure and is displaced, with augmentation of the fluid-pressure on

page_text: the bearing surface, towards its outer edge, substantially as described with reference
to Figure 6.
Dated the 10th day of December 1892.
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.