Shutter for ventilation systems

Details Shutter for ventilation systems Shutter for ventilation systems

1980-07-17

1985-04-30

Kannan, Philip C.

Movable or removable closures

Closures interconnected for concurrent movement

Louver-type closures

49 92, 981212, E06B 708

Patent

active

045135347

ABSTRACT:
A louver type shutter for ventilation systems has hollow flaps which are pivotally mounted in a frame. Seals made from a foamed sheet material are located between the flaps and the frame and the front edges of the flaps are pressed directly into the foam sheet.

REFERENCES:
patent: 2390227 (1945-12-01), Smith
patent: 3110936 (1963-11-01), Berard
patent: 3783768 (1974-01-01), Caming et al.
patent: 3885347 (1975-05-01), Adachi et al.

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