Slide valve for load sensing control in a hydraulic system

Details Slide valve for load sensing control in a hydraulic system Slide valve for load sensing control in a hydraulic system

1986-02-20

1988-01-19

Look, Edward K.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60427, F16D 3102

Patent

active

047197536

ABSTRACT:
A hydraulic or the like drive system which can include a variable-speed pump with at least one control element. The control element can be connected to a pump control piston arranged in a pump control cylinder, the position of which is determined by a control pressure. The drive system can further include a conveying conduit connected to the pump and a return conduit which leads to the respective reservoir, and can furthermore include control elements, with the conduit emanating from the pump are connected--by intervention of a respective branch line--several demand points which respectively can be connected to the conveying conduit by means of an in the respective branch line arranged, randomly movable valve. The valve has two auxiliary pistons arranged in the main piston of the valve and each auxiliary piston houses a reversing piston.

REFERENCES:
patent: 4122865 (1978-10-01), Budzich
patent: 4187877 (1980-02-01), Hodgson et al.
patent: 4617798 (1986-10-01), Krusch et al.

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