Piezo-type valve

Details Piezo-type valve Piezo-type valve

1983-02-28

1985-07-16

Zugel, Francis K.

Valves and valve actuation

Electrically actuated valve

Remote or follow-up control system for electrical actuator

251282, 123472, F16K 3102

Patent

active

045291640

ABSTRACT:
A piezo-type valve with piezo-elements as a valve actuator. The piezo-elements are interposed by two freely movable pistons. A pressure chamber is formed on the outer side of one of the pistons to limit its outward movement. Thus, the substantial part of the expansion of the piezo-elements is transmitted to the other piston. The other piston is connected to a valve element. At least one flow port and a relief port are formed in the valve body. When voltage is applied to the piezo-elements, the at least one flow port and the relief port are communicated.

REFERENCES:
patent: 2791237 (1957-05-01), Berninger
patent: 4019481 (1977-04-01), Lakra
patent: 4176832 (1979-12-01), Chadwick
patent: 4284263 (1981-08-01), Newcomb

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