Damper construction and spring

Details Damper construction and spring Damper construction and spring

1975-02-24

1976-03-02

Kannan, Philip C.

Flexible or portable closure, partition, or panel

Pleating type

160 1, 160235, E06B 348, E05F 112

Patent

active

039411796

ABSTRACT:
A folding blade damper comprising a rectangular frame and an assembly of blades hingedly interconnected along longitudinal marginal edges by tubular hinge elements. A spring is interposed between each interconnected pair of blades to resiliently urge the blades from a folded to an unfolded flow blocking position across the frame. The spring comprises a flat member having an arcuate portion generally coaxially of the tubular hinge elements and oppositely extending arms in overlying engagement with adjacent blades with fingers extending over an edge of a respective blade to engage the opposite face thereof and cooperate with the arms to resiliently and removably secure the spring to said blades whereby the arcuate portion is contracted upon folding of said pair of blades and then exerts a torque urging the connected blades to unfolded position.

REFERENCES:
patent: 3273632 (1966-09-01), McCabe
patent: 3525378 (1970-08-01), Root
patent: 3832756 (1974-09-01), Lew

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