Variable pressure control

Details Variable pressure control Variable pressure control

F - Mech Eng,Light,Heat,Weapons

04

B

103/12

F04B 49/10 (2006.01) F04B 1/32 (2006.01)

Patent

CA 1229015

VARIABLE PRESSURE CONTROL 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 cylin- der with either system pressure or drain and are re- motely 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.

453708

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