Motors: expansible chamber type – With motive fluid valve – Relatively movable serial valves
Patent
1997-02-07
1998-10-13
Nguyen, Hoang
Motors: expansible chamber type
With motive fluid valve
Relatively movable serial valves
91448, 137596, F15B 1108, F15B 1304
Patent
active
058196340
ABSTRACT:
A universal hydraulic stop valve has housing having check valves in a check valve bore. A needle in needle bore has spaced apart seals which may alternately seal against valve seats on adjustable knobs, with movement of the needle, which may be mechanically linked to a machine element moved by a hydraulic actuator. The universal hydraulic valve sets accurate starting and stopping positions, and also provides for gradual feathered stops.
REFERENCES:
patent: 3974742 (1976-08-01), Johnson
patent: 4085817 (1978-04-01), Kervagoret
patent: 4360187 (1982-11-01), Chapman
patent: 4854222 (1989-08-01), Vick
patent: 5220861 (1993-06-01), Kamimura
patent: 5437216 (1995-08-01), Chapman
Chapman/Leonard Studio Equipment Inc.
Nguyen Hoang
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