Motors: expansible chamber type – With motive fluid valve – Relatively movable serial valves
Patent
1986-04-07
1988-04-12
Wayner, William E.
Motors: expansible chamber type
With motive fluid valve
Relatively movable serial valves
1375962, F01B 300
Patent
active
047366729
ABSTRACT:
A lockout valve in a hydraulic system which meters the flow thereacross in accordance with the actuation pressure applied. The lockout valve is positioned in a circuit between the motor supporting the load and the directional control valve blocking flow from the motor; the lockout includes a spring-biased poppet urged against a seat; the poppet is slidably positioned in a bore defining a servo chamber therebehind; spring means urging the poppet means closed against the seat, the poppet including a head portion with a face thereon which seals against the seat, the head portion having a larger diameter than the first bore whereby a closing area is provided on the poppet subject to load pressure urging the poppet closed; the poppet including a sensing passage connecting the face of the poppet with said first bore and a stem means on the poppet downstream of the face which provides a turning surface for the high speed jet of oil passing through the lockout and a servo plunger in the lockout downstream of the poppet sensing pressure and acting against the stem means and the flow of oil flowing past the poppet.
REFERENCES:
patent: 3596566 (1971-08-01), Krehbiel
patent: 3906991 (1975-09-01), Haussler
patent: 4545287 (1985-10-01), Jackson
patent: 4624445 (1986-11-01), Putnam
Brown, Jr. Edward L.
Cessna Aircraft Company
Wayner William E.
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