Motors: expansible chamber type – With motive fluid valve – Relatively movable serial valves
Patent
1987-03-17
1988-06-07
Garrett, Robert E.
Motors: expansible chamber type
With motive fluid valve
Relatively movable serial valves
91461, 13759614, 13759616, F15B 1108
Patent
active
047488964
ABSTRACT:
A safety valve assembly for regulating the flow of a fluid under pressure to a fluid operated system e.g. a double acting cylinder element includes a housing with an inlet port, outlet ports and working ports and accommodating a pair of parallel valve spindles which are controllable by respective pilot valves so as to be shiftable between two valve positions. Each valve spindle is provided with a working piston, valve piston and a control piston which cooperates with a respective valve seat as defined by the housing. The control pistons of the valve spindles are successively disposed in a passageway extending between one of the working ports and one of the outlet ports.
REFERENCES:
patent: Re31161 (1983-03-01), Mahorney
patent: 3265089 (1966-08-01), Nill
patent: 4083381 (1978-04-01), McClocklin et al.
patent: 4257455 (1981-03-01), Cameron
patent: 4353392 (1982-10-01), Ruchser et al.
patent: 4542767 (1985-12-01), Thornton et al.
Baldauf Gunter
Ott Helmut
Feiereisen Henry M.
Garrett Robert E.
Herion-Werke KG
Newholm Therese
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