Hydraulic circuit with compensator valve biased with highest pressure acting on actuators
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United States of America Patent
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Sep 14, 1993
Grant Date -
N/A
app pub date -
Jun 18, 1991
filing date -
Jul 11, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
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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