Compact valve

Details Compact valve Compact valve

2006-07-26

2010-10-19

Bastianelli, John (Department: 3753)

Valves and valve actuation

Heat or buoyancy motor actuated

C251S129010, C251S294000, C251S337000

Reexamination Certificate

active

07815161

ABSTRACT:
A compact valve using a shape memory alloy comprises: a moving valve body that contacts an inner periphery of a guide pipe having an built-in orifice, is freely movable and has a sealing portion to seal the orifice; a biasing coil provided between the orifice and the moving valve body; and a wire formed of a shape memory alloy and held between a stationary electrode of the guide pipe and a moving electrode of the moving valve body. The orifice is sealed by moving the moving valve body due to transformation of the shape memory alloy by heating the wire. The moving valve body is enabled to be elastically deformable by providing a coil spring to reduce a stress, so that an overload to the moving valve body due to contraction of the wire is absorbed by elastic deformation of the moving valve body. Thereby, the overload to the shape memory alloy is reduced to prevent deterioration of repeatability of memorized shape, to increase durability and reliability of the valve.

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English language Abstract of JP 2-8573.
English language Abstract of JP 5-99369.
English language Abstract of JP 2004-204918.
English language Abstract of JP 61-52478.
English language Abstract of JP 8-285127.
English language Abstract of JP 10-325480.
English language Abstract of JP 9-313363.
English language Abstract of JP 11-153234.

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