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

1980-06-30

1981-08-04

Michalsky, Gerald A.

Fluid handling

Systems

Supply and exhaust

1375961, 137870, F15B 13044

Patent

active

042816823

ABSTRACT:
A remotely operated, direction switching proportional control 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: 3995652 (1976-12-01), Belart et al.

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