Flap for ventilation ducts

Details Flap for ventilation ducts Flap for ventilation ducts

1983-01-17

1985-03-26

Nilson, Robert G.

Fluid handling

With casing, support, protector or static constructional...

Jacketed

98119, 137527, 251368, 428140, F16K 1503

Patent

active

045066990

ABSTRACT:
The flap for ventilation ducts, particularly for automobile air-conditioning systems, includes a flap member having opposite surfaces with a predetermined number of openings therein, a longitudinal bottom edge, opposite side edges and an upper edge. A pocket-shaped covering of foam material on the flap member is arranged in two layers which are folded around the longitudinal edge of the flap member onto the opposite surfaces of the foam material including foam sections extending beyond the opposite side edges and the upper edge of the flap member. The layers have a bond-activated foil covering which faces the perforated wide surfaces of the flap, the foil covering connecting the foam-material sections extending beyond the opposite side edges and the upper edge of the flap members. The band activated foil covering further connects the portions of foam-material lying opposite each other at the perforations in the flap member.

REFERENCES:
patent: 2632722 (1953-03-01), Libberton
patent: 3813896 (1974-06-01), Lebahn
patent: 4067764 (1978-01-01), Walker
patent: 4191205 (1980-03-01), Nash
patent: 4263680 (1981-04-01), Reul
patent: 4294283 (1981-10-01), Scharres
patent: 4313984 (1982-02-01), Moraw

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