Power conserving hydraulic pump bypass compensator circuit

Details Power conserving hydraulic pump bypass compensator circuit Power conserving hydraulic pump bypass compensator circuit

2005-06-07

2005-06-07

Look, Edward K. (Department: 3745)

Power plants

Pressure fluid source and motor

Condition responsive control of motive fluid flow

C060S430000

Reexamination Certificate

active

06901754

ABSTRACT:
In a hydraulic system that has first and second pumps, a pressure compensation circuit is provided to unload the output of the second pump when its operation is not required. The unloading reduces the power demanded of the engine that drives the pumps thus conserving energy. The first pump is directly connected to a supply line and a back flow check valve couples the second pump to the supply line. When pressure in the supply line is significantly greater than the load pressure of the actuators powered by the hydraulic fluid a bypass compensator valve opens to provide a path between the outlet of the second pump and the tank line. This action unloads the second pump and reduces its demand for engine power.

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