Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1990-01-02
1992-03-17
Chambers, A. Michael
Fluid handling
Systems
Flow path with serial valves and/or closures
285321, F16L 3728
Patent
active
050959476
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a pressure-sealed plug coupling for providing a pressure-sealed connection to a counter-connecting member. Such plug couplings are used for detachably connecting fluid lines together or to counter-connecting elements, such as tanks or conduits.
BACKGROUND OF THE ART
Such a coupling is known from EP-A-0202592, a piston in a cylindrical housing being shiftable, and moving at its front end clamping jaws radially adjustable by axial displacement via a ramp arrangement. The induced axial reciprocating movement of the piston is effected by a hand lever.
This known plug coupling is, however, only suitable for coupling fluid lines such as filling hoses for tanks under relatively low pressure since, on disconnection, the filling lines remain under pressure, the roll of the clamping jaws being under considerable pressure due to axial pressure application. Disconnection by radially pushing the clamping jaws apart is thus only possible by considerable power application even with corresponding power step-up of the hand lever. Thus, ventilation valves are known at filling tanks or pumps; said valves can, however, be operated in a separate stage after operation of a further shut-off valve and before release of the coupling. This can, however, lead to high safety risk especially due to leakage of inflammable of explosive fluids if operation is incorrect, e.g., if individual valves are operated in the wrong order. This is true of filling stations where vehicles are tanked up with gaseous fuel.
German Disclosure Publication 28 23 886 (corresponding to U.S. application Ser. No. 801,719) shows a similar coupling device with a shiftable piston actuated by eccentric handle and with a clamping jaw actuated by a second handle. As two handles have to be actuated by the operator the handling of the coupling device is rather complicated and may cause danger, if the two handles are changed by mistake.
U.S. Pat. No. 3,474,827 has a coupling device having a flow passage through it; a valve member at one end of the passage can be moved to open or close the coupling device by an operating lever. Connection of the coupling device to an adapter is made by rotating the coupling device relative to the adapter and causing an engagement of notches within recesses. However, rotating the coupling device is complicated and uncomfortable to use. The same is true with respect to further French Patent 12 35 444, as two levers have to be actuated to connect or disconnect the coupling device.
SUMMARY OF THE INVENTION
is the main object of the invention to provide a plug coupling which allows a fast and safe connection or disconnection. These and other objects of the invention are accomplished by a coupling for fluid lines for pressure-sealed connection to a counter-connection, especially on a tank, with an axially displaceable piston in the coupling housing and an operating device for displacing the piston as well as at least one clamping element for connection to the counter-connection, wherein in the housing an inlet valve (A), a ventilation valve (B) and an outlet valve (C) are arranged; the inlet valve (A) and ventilation valve (B) are alternately moveable into the open position by the operating devices.
According to another aspect of the present invention, a plug coupling is proposed for fluid lines for pressure-sealed connection to a counter-connection, especially on a tank, with an axially displaceable piston in the coupling housing and an operating device for displacing the piston as well as at least one clamping element for connection to the counter-connection, wherein the counter connection has insert taper at its coupling end for acceptance of the outlet valve taper provided with an corresponding chamfer; the counter-connection connects in an axial direction with a centring collar and a groove for acceptance of a sealing ring, the groove surface forming at the same time an impact surface for the outlet valve taper on connection.
According to a further aspect of the present invention, th
REFERENCES:
patent: 2675829 (1954-04-01), Livers
patent: 3234965 (1966-02-01), Anderson
patent: 3680591 (1972-08-01), Vik
patent: 4249572 (1981-02-01), Shinelelar et al.
patent: 4376525 (1983-03-01), Fremy
patent: 4549577 (1985-10-01), Kugler
patent: 4613112 (1986-09-01), Philpot et al.
patent: 4681350 (1987-07-01), Gaita
Weh Erwin
Weh Wolfgang
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