Shut-off device for a fluid

Details Shut-off device for a fluid Shut-off device for a fluid

1983-07-14

1985-02-26

Yeung, James C.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251129, 239585, 239102, F16K 3112

Patent

active

045014060

ABSTRACT:
A shutoff device for a fluid with a body having a conduit in which, in use, the fluid flows, a plunger arranged slidingly in a seat formed in the body and provided with an end portion suited to shut off said conduit, and means controlling the movement of the plunger into said seat. The control means comprise at least in particular a member having a hollow shape, made in piezoelectric material and arranged inside a chamber formed in the body and communicating with part of the surface of said plunger. Into the chamber is contained a liquid which is subjected to pressure changes as a consequence of the volume changes induced in the piezoelectric member; said liquid causes the movement of the plunger and consequently the shutoff of the conduit.

REFERENCES:
patent: 1279027 (1918-09-01), Simmon et al.
patent: 2902251 (1959-09-01), Oncley
patent: 3465732 (1969-09-01), Kattchee
patent: 4022166 (1977-05-01), Bart
patent: 4298181 (1981-11-01), Corrado et al.

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