Device for controlling hydraulic power units
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United States of America Patent
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Nov 18, 2008
Grant Date -
Sep 14, 2006
app pub date -
Mar 19, 2004
filing date -
Mar 21, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
An arrangement for controlling two drive units which interact with one another, one of which includes a hydraulically driven motor (2). The motor drives a varying load, and one or more valves (6, 7) control hydraulic fluid flow through the motor during operation and for starting and stopping of the motor. One of the valves is a flow control valve (7) for flow control of the hydraulic fluid flow through the motor. The second drive unit (37) performs a working movement which, under the action of hydraulic flow influences the loading of the motor. The flow of the hydraulic fluid to the second drive unit is controlled in a coordinated way with the control of the flow through the motor.
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