Electro-hydraulic servo valve system

Details Electro-hydraulic servo valve system Electro-hydraulic servo valve system

1982-05-03

1984-06-26

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

91363A, 13762564, F15B 13043

Patent

active

044560311

ABSTRACT:
An electro-hydraulic servo valve system comprising a two-stage spool type servo valve including a first stage comprising an electrical force motor and a second stage including a spool for controlling flow to an actuator. The force motor is operable upon receipt of a command electrical signal to move the spool. A first feedback is operable to cause the force motor to stop the movement of the spool. A second feedback is also operable to stop the movement of the spool at a predetermined position. The second feedback has a greater gain than said first feedback so that it normally dominates in the system. The second feedback comprises a pair of identical electrical sensors connected in parallel, and operable by movement of the spool. A comparator circuit compares the electrical signals from the sensors and is operable when the signals deviate from one another by a predetermined amount to disable the second feedback so that the first feedback will function permitting the electro-hydraulic servo valve system to operate without the second feedback.

REFERENCES:
patent: 3910314 (1975-10-01), Nicholson
patent: 4150686 (1979-04-01), El Sherif et al.
patent: 4216795 (1980-08-01), Cobb et al.

Affiliated with

Also associated with

Rating

Electro-hydraulic servo valve system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electro-hydraulic servo valve system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electro-hydraulic servo valve system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2227810