Pressurized hydraulic fluid system with remote charge pump

Details Pressurized hydraulic fluid system with remote charge pump Pressurized hydraulic fluid system with remote charge pump

2005-12-13

2005-12-13

Lazo, Thomas E. (Department: 3745)

Power plants

Pressure fluid source and motor

With control means for structure storing work driving energy

C060S419000

Reexamination Certificate

active

06973782

ABSTRACT:
A pressurized hydraulic fluid system includes a charge pump, a hydraulic motor drivingly coupled to the charge pump, and a main hydraulic unit adapted to function as a pump to drive the hydraulic motor. The charge pump is in fluid communication with the main hydraulic unit for maintaining a sufficient inlet pressure in the main hydraulic unit when it functions as the pump. The system further includes a hydraulic fluid reservoir in fluid communication with an inlet of the charge pump, a hydraulic accumulator in fluid communication with the main hydraulic unit, and a return flow passage fluidly connecting the main hydraulic unit with the hydraulic fluid reservoir for returning an excess flow of the hydraulic fluid generated by the charge pump to the hydraulic fluid reservoir.

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