Control damper

Details Control damper Control damper

1979-08-20

1981-06-30

Nilson, Robert G.

Fluid handling

Systems

Dividing into parallel flow paths with recombining

98121A, F24F 1314

Patent

active

042757622

ABSTRACT:
A control damper for controlling the flow of air or other gaseous fluid through a duct, comprising a line of blades each of which is so supported for rotation in a surrounding frame that the blades are swingable about parallel axes to open or close an opening in the frame and to be movable at will to intermediate positions between their fully-open and fully-closed positions, in which the blades are of aerofoil shape.

REFERENCES:
patent: 1872599 (1932-08-01), LeGrand
patent: 3084715 (1963-04-01), Sharres
patent: 3281113 (1966-10-01), Ahern
patent: 3630098 (1971-12-01), Oxley
patent: 3771559 (1973-11-01), Alley
patent: 3885347 (1975-05-01), Adachi
patent: 3908529 (1975-09-01), McCabe

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