Stack damper valve

Details Stack damper valve Stack damper valve

1978-12-21

1981-05-26

Yeung, James C.

Stoves and furnaces

Dampers

Electric

126285B, 251212, F23L 300

Patent

active

042691664

ABSTRACT:
A stack damper valve comprising a pair of semicircular steel discs typically joined by a removable piano-type hinge. Each of the discs pivot upwardly in the direction of flow from a closed to an open position and vice versa. In the closed position the discs seat in a metal-to-metal relationship against a circular truncated steel seat which is secured such as by welding to the inner surface of the steel stack in which the valve is mounted.

REFERENCES:
patent: 1099689 (1914-06-01), Broadhurst
patent: 1125503 (1915-01-01), Fleck et al.
patent: 1773585 (1930-08-01), Klockau
patent: 2020686 (1935-11-01), Kaiser
patent: 3070345 (1962-12-01), Knecht
patent: 3076469 (1963-02-01), Averill
patent: 3084715 (1963-04-01), Schrarres
patent: 3181527 (1965-05-01), Forsman
patent: 3241568 (1966-03-01), Mayo, Jr.
patent: 3242943 (1966-03-01), Waterfill
patent: 3507256 (1970-04-01), Sander
patent: 3533438 (1970-10-01), Smith
patent: 3888166 (1975-06-01), Stottmann

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