Power plants – Pressure fluid source and motor – Having selecting means distributing motive fluid between...
Patent
1993-05-14
1995-04-18
Look, Edward K.
Power plants
Pressure fluid source and motor
Having selecting means distributing motive fluid between...
60484, F16D 3102
Patent
active
054067944
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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Curtiss Wright Flight Systems Inc.
Look Edward K.
Ryznic John
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