Temperature responsive line valve

Details Temperature responsive line valve Temperature responsive line valve

1986-07-03

1988-10-18

Tapolcai, William E.

Automatic temperature and humidity regulation

Motors

Fluid-operated

137468, 137470, 236 93B, 236101D, 251902, G05D 2302

Patent

active

047781041

ABSTRACT:
Line valve apparatus for shower anti-scald and other uses comprising a housing (10) valving member (14) and a coil spring pilot valve (20) formed of a shape memory effect alloy and arranged for a first closed loop fluid blocking configuration to prevent, and second open spiral loop configuration(s) to enable, coil expanding valving member movement under the combined force of line back pressure and the coil expanding forces per se as a rising fluid temperature puts the alloy through a martensitic to austentitic transformation.

REFERENCES:
patent: 3263926 (1966-08-01), Couffer et al.
patent: 3368758 (1968-02-01), Fraser
patent: 4180208 (1979-12-01), Obermaier
patent: 4210284 (1980-07-01), Tarnay et al.
patent: 4227646 (1980-10-01), Hart et al.
patent: 4570851 (1986-02-01), Cirillo
patent: 4570852 (1986-02-01), Ohkata

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