Proportional control type remote-control direction switching con

Details Proportional control type remote-control direction switching con Proportional control type remote-control direction switching con

1979-07-13

1981-08-11

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

13759617, F15B 13043

Patent

active

042829011

ABSTRACT:
A remotely operated, direction switching proportional control valve device comprises a direction switching control valve which includes a hydraulic actuator, an electromagnetic pressure reducing valve interposed between a liquid chamber of the hydraulic actuator and a hydraulic power source and an electromagnetic open or closed valve interposed between the liquid chamber and a liquid tank. Both the pressure reducing valve and the open or closed valve can be operated against an electromagnetic force for return movement. The device eliminates the requirement for a piston stroke detector and may be operated by a single electromagnetic coil.

REFERENCES:
patent: 3556154 (1971-01-01), Kramer
patent: 3964518 (1976-06-01), Hesse et al.
patent: 4072169 (1978-02-01), Heiser et al.

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