Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1998-04-24
1999-11-23
Chambers, A. Michael
Fluid handling
Systems
Flow path with serial valves and/or closures
137614, F16L 3728
Patent
active
059882166
ABSTRACT:
A coupling sleeve (1) for a hydraulic coupling has a member to receive and arrest a coupling plug. To open the plug valve of the coupling plug, a switching pin (16) is provided which passes through the valve body (9) of the coupling sleeve (1). In the open position, the pin (16) projects beyond the end face (12) into the receiving means (6). If the switching member (30) is opened by mistake, and it is to be returned to its closed position, the switching pin (16) must move into the starting position against the pressure in the sleeve chamber (37). To accomplish this movement, the switching pin (16) has an opening valve. The opening valve has an opening valve body (21) arranged in a through-channel (17) in the switching pin (16). The through-channel effects a connection between the receiving means (6) and the sleeve chamber (37) when the switching member (30) is returned into a closed position. Thus, the switching member (30) is able to return against the pressure building up in the sleeve chamber (37).
REFERENCES:
patent: 3680591 (1972-08-01), Vik
patent: 4009729 (1977-03-01), Vik
patent: 4564042 (1986-01-01), Ekman
patent: 5316033 (1994-05-01), Schumacher et al.
patent: 5586748 (1996-12-01), Kish
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