Hydraulic motor driving device
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United States of America Patent
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Jul 15, 2014
Grant Date -
Feb 2, 2012
app pub date -
Oct 7, 2010
filing date -
Oct 19, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A motor capacity change-over actuator 10 varies a capacity of a hydraulic motor 1 in accordance with the inflow/outflow of a working fluid into/out of a drive pressure chamber 72. A motor capacity change-over valve 20 supplies the working fluid to the drive pressure chamber 72 in a supply position H and discharges the working fluid from the drive pressure chamber 72 in a discharge position L. A flow control valve 15 is interposed between the drive pressure chamber 72 and the motor capacity change-over valve 20, and therefore a shock generated upon deceleration of the hydraulic motor 1 can be alleviated without being affected by leakage of the working fluid in the motor capacity change-over valve 20.
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