Thermal valve

Details Thermal valve Thermal valve

1977-12-27

1980-01-15

Schwadron, Martin P.

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

74 2, 137 72, 169 19, F16K 1738, A62C 3706

Patent

active

041833716

ABSTRACT:
A thermal responsive valve including a housing in which a valve member is normally urged from a first to a second position but restrained from such movement by restraining means including a pair of pins adapted to engage a portion of the member and be laterally spread apart against the frictional action of retaining means. The retaining means are in turn supported by a portion of a fusible link so when the temperature reaches a predetermined level, the fusible link melts and no longer supports the retaining means so that the pins may fall from restraining contact with the member by gravity and thus permit the member to move to the second position. The above indicated frictional coaction enables a relatively lightweight or weak fusible link to restrain a member against a relatively strong urging force by the mechanical advantage brought about by the coaction of the pins against the retaining means. Such mechanical advantage may further be increased by forming the member contacting portions of the first member of a conical shape.

REFERENCES:
patent: 306662 (1884-10-01), Stratton
patent: 998507 (1911-07-01), Hasty
patent: 1126914 (1915-02-01), Sullivan
patent: 2137685 (1938-11-01), Gillen
patent: 3587747 (1971-06-01), Romero et al.
patent: 3659624 (1972-05-01), Kelly et al.
patent: 3916930 (1975-11-01), Erickson

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