Hydraulic system for working vehicles

Details Hydraulic system for working vehicles Hydraulic system for working vehicles

1987-06-17

1988-11-29

Look, Edward K.

Motors: expansible chamber type

With motive fluid valve

To provide unequal inlet and exhaust flow rates to single...

91445, 91447, F15B 1108

Patent

active

047872934

ABSTRACT:
A hydraulic system for raising and lowering a working machine in a working vehicle such as agricultural tractors, which comprises a hydraulic cylinder, a hydraulic pump, an oil tank, a manual valve shiftable between three positions: a stationary position in which a working oil discharged from said hydraulic pump is released into the oil tank; a raised position in which the working oil is supplied into the hydraulic cylinder; and a lowered position in which the working oil supplied into the hydraulic cylinder is passed back into the oil tank, and a check valve for permitting only a flow of the working oil from the manual valve toward the hydraulic cylinder.

REFERENCES:
patent: 2633803 (1953-04-01), Carey
patent: 3088283 (1963-05-01), Furia et al.
patent: 3500721 (1970-03-01), Allen
patent: 3623509 (1971-11-01), Sesseler
patent: 3972267 (1976-08-01), Haak et al.
patent: 4221156 (1980-09-01), Zirps et al.
patent: 4344355 (1982-08-01), Schwerin

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