Bi-metallic vane vent damper

Details Bi-metallic vane vent damper Bi-metallic vane vent damper

1981-06-11

1984-04-10

Yeung, James C.

Automatic temperature and humidity regulation

Thermostatic

In fluid controlled

126292, 126285R, G05D 2302

Patent

active

044416539

ABSTRACT:
A thermally actuated damper for insertion in the flue pipe of furnaces consists of a cylindrical section of pipe having a diametrically extending bar fixed across its interior. The bar supports a pair of identical, semi-circular vanes formed of a bi-metallic laminate which project in a common direction from the bar. When the furnace is operating the hot flue gases cause the vanes to bend into abutment with one another so that they extend longitudinally along the flue pipe and allow substantially unrestricted flow of vent gases. When the furnace is off the cooling blades bend outwardly, toward the walls of the flue pipe, substantially blocking the flow of gases through the flue so that the warm air from the heated space is not drawn up the flue.

REFERENCES:
patent: 1608205 (1926-11-01), Francke
patent: 2673687 (1954-03-01), Alban et al.
patent: 3366333 (1968-01-01), Diehl
patent: 4191326 (1980-03-01), Diermayer et al.
patent: 4272013 (1981-06-01), Diermayer et al.
patent: 4337892 (1982-07-01), Diermayer et al.

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