Hydraulic control circuit for controlling and monitoring operati

Details Hydraulic control circuit for controlling and monitoring operati Hydraulic control circuit for controlling and monitoring operati

1983-08-29

1985-12-03

Look, Edward K.

Motors: expansible chamber type

With motive fluid valve

Relatively movable serial valves

137491, F15B 1108

Patent

active

045559775

ABSTRACT:
A valve device for controlling and monitoring an operating pressure in a hydraulically operated consumer arrangement, such as a tool chuck or head stock of a machine tool, includes a pressure reducing valve coupled to the consumer device and a servo valve connected to the pressure reducing valve for adjusting the operating pressure to a maximal allowable value. The servo valve is in turn connected to a flow monitoring device which upon reduction of operating pressure in the consumer device generates an electrical signal which is used for shutting off the consumer device.

REFERENCES:
patent: 1361636 (1920-12-01), Stage
patent: 2326462 (1943-08-01), Johnson
patent: 2851564 (1968-09-01), Zimmerman
patent: 2923306 (1960-02-01), Mitchell
patent: 3613717 (1971-10-01), Smith
patent: 3945399 (1976-03-01), Tirelli

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