Fluid handling – Systems – Multi-way valve unit
Patent
1989-11-22
1992-06-02
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
1376256, F15B 13043
Patent
active
051178680
ABSTRACT:
Pilot-controlled directional valve having two positions, an admitting position and a closing position for a hydraulic user device, such closing position can be obtained independently from the presence of a supplied hydraulic pressure.
REFERENCES:
patent: 2913005 (1959-11-01), Grant et al.
patent: 2977984 (1961-04-01), Barnes
patent: 2997064 (1961-08-01), Gerwig et al.
patent: 3265089 (1966-08-01), Nill
patent: 4567914 (1986-02-01), Coppola et al.
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