Incrementally adjustable vent

Details Incrementally adjustable vent Incrementally adjustable vent

1984-11-21

1985-12-10

Joyce, Harold

Valves and valve actuation

Rotary valves

Ball valve

251297, 251303, F16K 2404

Patent

active

045571830

ABSTRACT:
An energy saving incrementally adjustable vent, for permitting the passage of air from one defined space to another which can be mounted on a vertical or horizontal surface includes a frame for mounting over an opening communicating therebetween. The frame has a central passageway disposed therethrough and a flap movably mounted to the frame, so as to be movable from a closed position substantially blocking the passageway, to an open position, permitting the flow of air therethrough. An adjustment device has a detent apparatus affixed to the frame. The adjustment device cooperates with the flap to provide a means for selectively adjusting the amount of air flow therethrough.

REFERENCES:
patent: 928481 (1909-07-01), Tenold
patent: 1351109 (1920-08-01), Livengood
patent: 2272960 (1942-02-01), Young, Jr.
patent: 2659292 (1953-11-01), Kurek
patent: 2718187 (1955-09-01), Frisby
patent: 2835269 (1958-05-01), Seymour
patent: 4295486 (1981-10-01), McCabe

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