Method for supplying unaerated hydraulic fluid to a work system

Details Method for supplying unaerated hydraulic fluid to a work system Method for supplying unaerated hydraulic fluid to a work system

1975-04-04

1976-11-16

Cline, William R.

Power plants

Pressure fluid source and motor

Methods of operation

60453, 60477, 137 1, E03B 100

Patent

active

039915689

ABSTRACT:
A hydraulic circuit comprises a first tank elevated above a second tank and openly communicating therewith by a conduit adapted to continuously maintain the second tank at full capacity with a hydraulic fluid. The hydraulic fluid is pumped out of the second tank and to a work system wherefrom it is recircuited back through a filtering system, retained in the first tank. Upon malfunctioning of the filtering system to prevent the egress of hydraulic fluid therethrough, the increased pressure level of the recircuited hydraulic fluid will function to open a directional control check valve in the second tank to by-pass the conduit normally communicating hydraulic fluid from the first tank to the second tank.

REFERENCES:
patent: 1888953 (1932-11-01), Humphrey
patent: 2211753 (1940-08-01), Leopold
patent: 2243446 (1941-05-01), Terlesky
patent: 2287396 (1942-06-01), Roth
patent: 2490319 (1949-12-01), Palsgrove
patent: 2742914 (1956-04-01), Hannay et al.
patent: 3222865 (1965-12-01), Miller
patent: 3269541 (1966-08-01), Neely

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