Linearly actuated valve

Details Linearly actuated valve Linearly actuated valve

1991-07-22

1993-05-18

Rosenthal, Arnold

Valves and valve actuation

Heat or buoyancy motor actuated

60527, 60528, F16K 3166, F16K 3102

Patent

active

052113710

ABSTRACT:
The invention comprises a linearly actuated valve which includes a valve body, a valve seal linearly movable with respect to the body between closed and open positions, a spring and a shape memory alloy wire. The spring both biases the valve toward the closed position, and forms a part of the electrical circuit providing current to the shape memory alloy wire. The valve seal may be accurately positioned between the closed position and the open position by applying a pulse frequency modulated electrical current to the spring and the shape memory alloy wire. The electrical circuit is continuously closed and is comprised entirely of electrical conductors having no sliding electrical contacts to eliminate arcing and sparking.

REFERENCES:
patent: 4577607 (1986-03-01), Nishio
patent: 4714193 (1987-12-01), Yogo
patent: 4736587 (1988-04-01), Suzuki
patent: 4790343 (1988-12-01), Mochizuki
patent: 4806815 (1990-02-01), Honma
patent: 4932429 (1990-06-01), Wantanabe et al.
patent: 4941526 (1990-07-01), Nilsson
patent: 4973024 (1990-11-01), Honma

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