Valves and valve actuation – With correlated flow path – Valve operated by joining flow path sections
Patent
1980-08-20
1983-01-04
Chambers, A. Michael
Valves and valve actuation
With correlated flow path
Valve operated by joining flow path sections
285316, 285DIG25, F16L 3728
Patent
active
043669450
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a pipe-coupling for forming a connection between a socket-member and a nipple which can be inserted into the socket member, and having a valve arranged in the socket-member which closes automatically upon uncoupling, and at least one spring-loaded locking element arranged in the socket-member, which locking element engages in a circumferential groove of the nipple and is movable into an unlocked position by an external sliding sleeve on the socket-member.
A pipe-coupling of this kind is known from Swiss patent specification No. 323097. When the nipple is pushed in, that is to say, when coupling is effected, the spring-loaded locking element is depressed by a forward part of the nipple and then engages in the circumferential groove of the nipple under the pressure of a spring-element. In this case, displacement of the sleeve is not necessary, so that the nipple can be engaged with the socket-member in a particularly simple manner. However, displacement of the sleeve allows the locking element to move out of its engaged position in the circumferential groove, so that the coupling is released. The valve provided in the socket-member then closes immediately and the connection with the source of pressure e.g. the compressed air source, is interrupted. However, since there will still be air under pressure in the hose which is usually connected to the nipple, the danger exists that the hose and the nipple with it, will be flung away from the socket-member in an uncontrolled movement, under the effect of the air-pressure and the escaping air, and that someone will be injured. In order to avoid this difficulty, a pipe-coupling is already known in which uncoupling is effected by displacement of the external sleeve in two stages, so that between these two stages, compressed air trapped in the hose which carries the nipple and which is to be disconnected, can be released. However, this pipe-coupling has the disadvantages that the nipple can only be inserted after the sleeve has previously been actuated and one of the release-movements of the sleeve can already take place under the pressure of a spring, so that inadvertent uncoupling can take place due to the sleeve being hit.
SUMMARY OF THE INVENTION
The above mentioned disadvantages of the known pipe-couplings are avoided by a pipe-coupling in accordance with the invention, having the features of the claims.
The invention will now be described in greater detail with reference to the embodiments shown by way of example in the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an axial longitudinal section through a pipe-coupling taken on two planes at an angle of 90.degree., along the lines II--II of FIG. 2, showing the situation before insertion of the nipple,
FIG. 2 is an elevational view of the socket-member of the coupling, taken from the side at which the nipple is inserted;
FIG. 3 shows the pipe-coupling of FIG. 1 in the coupled condition, partly in longitudinal axial section and partly in side view;
FIG. 4 is a longitudinal axial section taken on two planes at an angle of 90.degree., showing the pipe-coupling in a partially uncoupled condition; and
FIG. 5 is a longitudinal axial section taken on two planes at an angle of 90.degree., showing a pipe-coupling in accordance with a second embodiment .
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The pipe-coupling of the invention serves for connecting two pipe-members which are not shown, one of which may for example be fixedly mounted and has a socket-member 2 fitted thereto, while the other pipe-member which is usually in the form of a hose, has a nipple 4 at its end. The nipple 4, which is only partly shown, has at its end which is not visible, a part which receives the hose-end and which may be in the form of, for example, a threaded connector. The form of the nipple corresponds to that of the nipples of known pipe-couplings, so that it is possible to couple hoses provided with nipples of the type customary hitherto, with a pipe-member fitted to the socket-member 2. This nipple h
REFERENCES:
patent: 2905485 (1959-09-01), Zajac
patent: 4060219 (1977-11-01), Crawford
Abnox AG
Chambers A. Michael
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