Circulating flow hydraulic pilot system

Details Circulating flow hydraulic pilot system Circulating flow hydraulic pilot system

1977-12-14

1980-07-08

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

91 48, 91 51, 91 52, 1376256, 251 26, F15B 13043

Patent

active

042112567

ABSTRACT:
A circulating flow hydraulic pilot system supplies pressurized fluid from a source to a sump through first and second parallel disposed conduits. Selective pressurization of each conduit is achieved by a pilot valve and a fluid restrictor that are series interposed into each conduit. A fluid actuator includes two ports that communicate with respective ones of the conduits intermediate of respective ones of the pilot valves and fluid restrictors. Other pilot valves are provided for manually overriding the pilot system.

REFERENCES:
patent: 2729242 (1956-01-01), Olson
patent: 3304953 (1967-02-01), Wickline et al.
patent: 3434390 (1969-03-01), Weiss
patent: 3537355 (1970-11-01), Bliss
patent: 3964518 (1976-06-01), Hesse et al.
patent: 4014509 (1977-03-01), Yoshino et al.

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