Self-pressurizing hydraulic control system

Details Self-pressurizing hydraulic control system Self-pressurizing hydraulic control system

1984-11-13

1986-08-19

Michalsky, Gerald A.

Motors: expansible chamber type

With motive fluid valve

Both inlet and exhaust controlled by motive fluid pressure...

91461, F15B 13042

Patent

active

046062580

ABSTRACT:
A hydraulic system for operating a pressurizable load off a pressure source having a high-pressure side and a low-pressure side has a main valve having a load side connected to the load and a source side connected to both sides of the source and displaceable between one position permitting flow from the source to the load and another position for opposite flow. Respective fluid-operated actuators displace the valve into its positions. A controller has an input side connected to the high-pressure sides of the source at the source side of the valve and an output side connected to the load at the load-side of the valve and with the sump at the source side of the valve. This controller also is connected to the actuators for pressurizing same alternately and thereby moving the valve between its positions. A pressurizing unit is connected at least to the source side of the pump and to both sides of the valve and of the controller for maintaining a generally constant pressure drop across the valve and the controller.

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