Hydrostatic transmission having proportional pressure variable displacement pump for loop charge and fan flow supply
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United States of America Patent
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May 15, 2012
Grant Date -
Jun 3, 2010
app pub date -
Dec 3, 2008
filing date -
Dec 3, 2008
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A hydrostatic transmission having a hydraulic pump that is fluidly connected to a hydraulic motor. The transmission also has a pressure control valve that has first and second stages and is fluidly connected to the hydraulic pump. By utilizing the pressure control valve when the first stage of the pressure control is at a minimum pressure the second stage determines the minimum charge pressure setting for the hydrostatic transmission.
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