Thermally activated snap-action valve

Details Thermally activated snap-action valve Thermally activated snap-action valve

1988-05-31

1989-04-18

Tapolcai, William E.

Automatic temperature and humidity regulation

Snap-acting

Including a permanent magnet

236 93R, 251357, 251359, G05D 2310

Patent

active

048219541

ABSTRACT:
A thermally activated snap-action valve includes a valve body having an interior cavity and inlet and outlet passages formed therein and a bimetallic disc, a ball element, and a resilient positioning plate in the cavity. The positioning plate is operative for normally positioning the ball element in inwardly spaced relation to a valve seat at the inner end of the outlet passage, and the bimetallic disc is mounted in the cavity so that the pressures in a fluid passing through the valve are substantially equal on opposite sides of the bimetallic disc. The bimetallic disc is operative with a flexing action in response to a predetermined temperature condition for moving the ball element to a closed position wherein it is received in the valve seat to obstruct the outward flow of fluid through the outlet passage.

REFERENCES:
patent: 2451586 (1948-10-01), Strid
patent: 2533600 (1950-12-01), Matteson
patent: 3302662 (1967-02-01), Webb
patent: 3903923 (1975-09-01), Loup et al.
patent: 4311272 (1982-01-01), Foller
patent: 4471906 (1984-09-01), Noguchi et al.
patent: 4674540 (1987-06-01), Takei et al.
patent: 4723704 (1988-02-01), Muramoto

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