Spring centered balanced resolver valve

Details Spring centered balanced resolver valve Spring centered balanced resolver valve

1975-10-28

1977-05-24

Cohen, Irwin C.

Motors: expansible chamber type

Differential

91411R, 91451, 137102, 137112, F15B 1116, F15B 1308

Patent

active

040247970

ABSTRACT:
A hydraulic system including a source of pressurized fluid, a plurality of hydraulic motors with a plurality of control valves for directing fluid from the source to the motors, a dual-stage relief valve for the system for normally establishing a first pressure for part of the system for some of the motors and a second pressure for part of the system for the remainder of the motors and responsive to at least a pair of the control valves of the system for establishing the higher pressure includes a balanced resolver valve disposed between the pair of directional control valves and the relief valve and operative to prevent simultaneous communication of the pair of valves with the relief valve.

REFERENCES:
patent: 2354791 (1944-08-01), Boldt
patent: 2982260 (1961-05-01), Hunter
patent: 3434286 (1969-03-01), Raizes
patent: 3693506 (1972-09-01), McMillen et al.
patent: 3774707 (1973-11-01), Bridwell et al.
patent: 3817153 (1974-06-01), Zuner
patent: 3831620 (1974-08-01), Bianchetta et al.
patent: 3902401 (1975-09-01), Allen et al.

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