Ferroelectric fluid flow control valve

Details Ferroelectric fluid flow control valve Ferroelectric fluid flow control valve

1997-04-03

1999-10-05

Rivell, John

Valves and valve actuation

Electrically actuated valve

Having element dimensionally responsive to field

251331, F16K 3102

Patent

active

059610964

ABSTRACT:
An active valve is controlled and driven by external electrical actuation of a ferroelectric actuator to provide for improved passage of the fluid during certain time periods and to provide positive closure of the valve during other time periods. The valve provides improved passage in the direction of flow and positive closure in the direction against the flow. The actuator is a dome shaped internally prestressed ferroelectric actuator having a curvature, said dome shaped actuator having a rim and an apex, and a dome height measured from a plane through said rim said apex that varies with an electric voltage applied between an inside and an outside surface of said dome shaped actuator.

REFERENCES:
patent: 3174716 (1965-03-01), Salter
patent: 4581624 (1986-04-01), O'Connor
patent: 4610426 (1986-09-01), Brandner
patent: 5029805 (1991-07-01), Albarda et al.
patent: 5471721 (1995-12-01), Haertling
patent: 5802195 (1998-09-01), Regan et al.

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