Rotating blade damper

Details Rotating blade damper Rotating blade damper

1978-03-29

1980-01-29

Nilson, Robert G.

Fluid handling

Systems

Dividing into parallel flow paths with recombining

98121A, 251305, F24F 1314

Patent

active

041856589

ABSTRACT:
A novel rotating blade fire, smoke and air control damper is disclosed wherein integral hook-shaped hinge portions of the damper blades cooperate with integral hook-shaped hinge elements on opposing inwardly depending flanges of the damper frame. The flanges are additionally notched so that hook-shaped ends on the damper blades are capable of creating seals with their adjacent blades across their entire lengths, while top and bottom inwardly depending flanges are offset with respect to the plane of the blades to create seals with the offset tips of the end most blades of the damper when those blades are in the closed position. Finally, at one end of the blades a rectangular notch is formed which, upon rotation of the blade, interfers with a linkage rod disposed adjacent to the frame side wall to define a "full open" position.

REFERENCES:
patent: 4081173 (1978-03-01), McCabe

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