Power plants – Pressure fluid source and motor – Methods of operation
Patent
1983-06-24
1989-03-28
Look, Edward K.
Power plants
Pressure fluid source and motor
Methods of operation
60443, 60452, 417217, 417222, F16D 3102
Patent
active
048152897
ABSTRACT:
A variable pressure control for controlling displacement of a variable displacement over-center pump utilizes a pair of remotely variable pressure limiter three-way valves which are associated one with each of a pair of servo cylinders operably connected to a swash plate of the pump and acting in opposition for positioning of the swash plate. The pressure limiter valves each control the communication of a servo cylinder with either system pressure or drain and are remotely operable to set a displacement of the pump and limit the pressure of the fluid delivered by the pump. This structure enables setting of pump displacement without the use of a displacement control valve associated with the servo cylinders.
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Publication of Hydraulics, Inc. entitled Torque Control for Port "A" & B, Nov. 1983.
Look Edward K.
Sundstrand Corporation
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