Electrically controlled valves

Details Electrically controlled valves Electrically controlled valves

1984-03-27

1985-08-20

Michalsky, Gerald A.

Fluid handling

Systems

Supply and exhaust

13762544, 13762565, 137870, F15B 13044

Patent

active

045358109

ABSTRACT:
An electrically controlled valve using a piezoelectric strip as an actuator can be constructed so as to include a valve body having separate pressure and return chambers connected by two different load passages. These load passages are connected to service ports used to connect a load to the valve. These passages are open at their ends into the two chambers. A pressure port is used to supply a fluid under pressure to the pressure chamber while a return port is used to convey fluid from the return chamber. The actuator is mounted in such a manner that it can be actuated by an electric signal to move with respect to the openings in the chambers so as to cause an increase in the pressure in one of the load passages and a decrease in the pressure in the other. The position of the actuator can be reversed. When the valve is not in use the actuator is located so that the pressures in both of the load passages are the same.

REFERENCES:
patent: 2928409 (1960-03-01), Johnson et al.
patent: 3063422 (1962-11-01), Gregowski et al.
patent: 3455330 (1969-07-01), Williams et al.
patent: 3833017 (1974-09-01), Gordon et al.
"Piezoceramic Bender Elements", Gulton Industries, Inc.

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