Dual variable displacement over-center hydraulic motor power drive unit
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United States of America Patent
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Apr 18, 1995
Grant Date -
N/A
app pub date -
May 14, 1993
filing date -
May 14, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The use of two variable displacement over-center hydraulic motors 12,14 in conjunction with a torque-summing gearbox 16 for maintaining the torque output of a power drive unit 10 in a typical closed loop control system is described. The torque output of the power drive unit 10 is maintained as either the sum or the difference of the torque outputs produced by the two variable displacement over-center hydraulic motors 12,14, depending upon the required system performance. This present invention use overcomes the problems associated with a single variable displacement over-center hydraulic motor operating in the stick-slip zone.
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Cited Art Landscape
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