Pumps – With condition responsive pumped fluid control – Expansible chamber pump distributor operation modified
Patent
1984-06-27
1985-05-28
Gluck, Richard E.
Pumps
With condition responsive pumped fluid control
Expansible chamber pump distributor operation modified
417270, F04B 4902, F04B 4908
Patent
active
045197520
ABSTRACT:
A control system for varying the volume of fluid discharged from a variable displacement hydraulic pump having a plurality of reciprocating pistons. Each piston includes an inlet check valve which controls the flow of fluid from an inlet supply line to the piston chamber, and an outlet check valve which controls the flow of fluid from the piston chamber to a discharge line. The displacement of the pump is controlled by a series of actuator members which regulate the working pressure developed by each piston by controlling the positions of the inlet check valves. Each actuator member is movable between a first position wherein it permits an inlet check valve to close and enable its corresponding piston to develop working pressure in the piston chamber, and a second position wherein it opens the inlet check valve to prevent the development of working pressure in the piston chamber. The actuator member may in one form be pilot-operated pistons or in another form be resilient elastic elements both of which are shiftable to open the inlet check valve in response to the pressure in the pump discharge line.
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Applied Power Inc.
Gluck Richard E.
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