Airflow control device of the wound film type, in particular for

Details Airflow control device of the wound film type, in particular for Airflow control device of the wound film type, in particular for

1997-07-30

1999-05-25

Ferensic, Denise L.

Valves and valve actuation

Reciprocating valve

Gate

251901, F16K 300

Patent

active

059063556

ABSTRACT:
A flow control device for controlling the flow of a stream of air through an air passage aperture, such as the open end of a duct in a heating and/or air conditioning apparatus of a motor vehicle, comprises a strip of film, the two ends of which are wound on two rollers spaced apart from each other. The film has an active region extending between the rollers and displaceable across the aperture by rotation of the rollers. The active region has open regions and closed regions for the selective control of the air stream. The device has a case defining two reserve spaces, each surrounding a respective roller, and serving as a magazine for receiving a slack loop of the film resulting from the differences between the overall diameters of the two rollers.

REFERENCES:
patent: 3773077 (1973-11-01), Barnebey
patent: 3828816 (1974-08-01), Barnebey
patent: 4867202 (1989-09-01), Farmer
patent: 5105730 (1992-04-01), Smith
patent: 5154223 (1992-10-01), Ishimaru et al.
patent: 5160115 (1992-11-01), Ito et al.
patent: 5243830 (1993-09-01), Ito et al.

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