Hydraulic circuit with compensator valve biased with highest pre

Details Hydraulic circuit with compensator valve biased with highest pre Hydraulic circuit with compensator valve biased with highest pre

1991-06-18

1993-09-14

Look, Edward K.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60426, 60494, 91445, 91447, 91517, 91531, F16D 3102, F15B 1108, F15B 1304

Patent

active

052438201

ABSTRACT:
When a hydraulic circuit for driving actuators of a construction machine or the like includes a single hydraulic pump and a plurality of direction changeover valves connected to the hydraulic pump for controlling the respective actuators, operation of one of the direction changeover valves may result in undesirable change in the output oil pressure of the other direction changeover valves. The inventive hydraulic circuit includes means for driving a regulator of the hydraulic pump in response to any oil puressure change at the inlets of the direction changeover valves corresponding to the output oil pressure change, thereby compensating for the pressure change.

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patent: 5025625 (1991-06-01), Morikawa
patent: 5067389 (1991-11-01), St. Germain
patent: 5077972 (1992-01-01), Bianchetta et al.
patent: 5101629 (1992-04-01), Sugiyamo et al.
patent: 5129229 (1992-07-01), Nakamura et al.
patent: 5146747 (1992-09-01), Sugiyama et al.

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