Rotation control system for working-machine pump
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United States of America Patent
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Apr 2, 2013
Grant Date -
Mar 11, 2010
app pub date -
Feb 21, 2008
filing date -
Mar 8, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A rotation control system of a hoist pump includes: the hoist pump (3); an engine (2) for driving the hoist pump (3); a working equipment driven by a hydraulic cylinder that is extendable by hydraulic oil delivered through the hoist pump (3); a hydraulic oil tank that stores the hydraulic oil supplied to the hoist pump (3) and receives the hydraulic oil returned from the hydraulic cylinder; and a controller (9) that controls a rotation speed of the hoist pump (3) to be an allowable rotation speed that is set in advance for preventing cavitation while the hydraulic cylinder is operated.
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