Electrohydraulic actuator

Details Electrohydraulic actuator Electrohydraulic actuator

1991-07-17

1992-09-22

Michalsky, Gerald A.

Motors: expansible chamber type

With motive fluid valve

Electrically operated

91461, 13762564, 25112906, F15B 13043

Patent

active

051487357

ABSTRACT:
The actuator has a moving spool in a valve body for controlling the pressure medium inflow to and from an actuating cylinder. The pressure medium in the valve body is conducted to each end of the spool in order to use the pressure medium to move the spool when desired. A pair of piezo-electric or magnetostrictive servomotors are provided to actuate on/off valves, each of which controls a flow of pressure medium from each end of the spool. Upon actuation of a servomotor, a valve is opened so that the pressure at the corresponding end of the spool decreases causing a shift of the spool in that direction. The servomotors are triggered by brief electrical digital signals.

REFERENCES:
patent: 3023782 (1962-03-01), Chaves et al.
patent: 3804120 (1974-04-01), Garnett
patent: 3964518 (1976-06-01), Hesse et al.
patent: 4150686 (1979-04-01), El Sherif et al.
patent: 4176822 (1979-12-01), Chadwick
patent: 4284263 (1981-08-01), Newcomb
patent: 4298181 (1981-11-01), Corrado
patent: 4538644 (1985-09-01), Knutson et al.
patent: 4617952 (1986-10-01), Fujiwara et al.
patent: 4705059 (1987-11-01), Lecerf et al.
patent: 4736773 (1988-04-01), Perry et al.
patent: 4825894 (1989-05-01), Cummins
patent: 4971106 (1990-11-01), Tsutsui et al.

Affiliated with

Also associated with

Rating

Electrohydraulic actuator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrohydraulic actuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrohydraulic actuator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1061065