Pressure detecting system for a hydraulic device

Details Pressure detecting system for a hydraulic device Pressure detecting system for a hydraulic device

1987-12-10

1989-05-09

Freeh, William L.

Pumps

With condition responsive pumped fluid control

Reversibly driven pump having bypass active in either flow...

417310, 417307, 418200, F04B 4902, F04B 4908

Patent

active

048284629

ABSTRACT:
A system for detecting when the pressure on a bi-directional hydraulic device, such as a motor or a pump, exceeds a predetermined pressure. The device is of the type having two meshing gears mounted to rotate in a housing. Fluid inlet and outlet ports are located in the housing on opposite sides of the meshing gear teeth. A pilot port is located in the housing to detect the fluid pressure between one gear and the housing at a location isolated from the inlet and outlet ports. The sensed pressure is a function of the maximum pressure at the inlet and outlet ports.

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patent: 4495767 (1985-01-01), Akiyama et al.
patent: 4548231 (1985-10-01), Schwede

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