Flushing valve system in closed circuit hydrostatic power transm

Details Flushing valve system in closed circuit hydrostatic power transm Flushing valve system in closed circuit hydrostatic power transm

1982-02-24

1985-07-30

Richter, Sheldon J.

Power plants

Pressure fluid source and motor

Having distinct cooling or lubricating structure

60461, 60464, 60468, F16D 3102

Patent

active

045313695

ABSTRACT:
A flushing valve system suitable for use in a closed circuit hydrostatic transmission including a variable displacement hydraulic pump, a hydraulic actuator and two main lines. The flushing valve system includes poppet valves mounted in passages for respectively communicating the main lines with a fluid tank, passages mounting throttles for causing the pressure in the main lines to act on pressure chambers to keep poppets of the poppet valves from moving to an open position, and a change-over valve responsive to the pressure differential between the main lines to communicate the pressure chamber of the poppet valve connected to the main line on the lower pressure side with the fluid tank. The poppet valve connected to the main line on the lower pressure side opens when a predetermined pressure level is exceeded by the pressure in the main line, to thereby allow working fluid in the main line to be drained to the fluid tank.

REFERENCES:
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W. Backe, "Systematik der Hydraulischen Widerstandsschaltungen", 1974, Germany, pp. 184 to 189.

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