Air actuated damper

Details Air actuated damper Air actuated damper

1991-02-19

1992-02-25

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

F16K 1503

Patent

active

050904450

ABSTRACT:
An improved air actuated damper device (10, 30) is described. The damper comprises a cylindrical conduit (11, 31) that can be joined to a flue pipe (17) at a proximal end (11b, 31b) of the damper device; a damper support beam (13, 33) across the conduit offset above a longitudinal axis (a-a, c-c) of the conduit; and a damper blade (15, 35) that pivots on a pivot axis (b-b, e-e). The damper blade is comprised of an upper section (15a, 35a) and a lower section (15b, 35b) so that the damper blade pivots on the pivot axis and opens when gas flows through the conduit and closes to seal against sealing lips (11e, 31e) and 11f, 31f) extending from and into the conduit when there is no gas flow. The device provides reliable dampering for the flue gas exhaust of a furnace.

REFERENCES:
patent: 2840317 (1958-06-01), Kozak
patent: 3941151 (1976-03-01), Biddle
patent: 4174913 (1979-11-01), Schliesser
patent: 4262608 (1981-04-01), Jackson

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