Forced ventilation system for motor vehicles

Details Forced ventilation system for motor vehicles Forced ventilation system for motor vehicles

B - Operations, Transporting

60

H

B60H 1/24 (2006.01) B29C 45/00 (2006.01) B29C 45/16 (2006.01) B60R 21/16 (2006.01)

Patent

CA 2260964

A method is disclosed for making a forced ventilation apparatus (1) for equalizing a pressure difference between a passenger compartment and surroundings of a motor vehicle. The apparatus (1) includes a frame (2) made of hard plastics and delimiting an aperture (3), and a flat ventilation flap (7) made of an elastomer material and secured to the frame (2). A resilient restoring force counteracts opening movement of the ventilation flap (7) from a closed position in which the ventilation flap (7) rests on the frame (2) and closes the aperture (3) in the frame. The method comprises the step of injection-moulding the ventilation flap (7) to the frame (2) in an opened position. To this end, the elastomer material is pressed from a free end of the ventilation flap (7) into a common contact area (8) of the ventilation flap (7) with the frame (2).

L'invention concerne un système de ventilation forcée (1) pour compenser la pression entre l'intérieur et l'environnement d'une automobile, qui comporte un cadre (2) en plastique dur délimitant une ouverture (3) et un volet de ventilation (7) en élastomère, plan, fixé sur le cadre, une force de rappel élastique agissant à l'encontre de l'ouverture du clapet de ventilation (7) depuis une position de fermeture, dans laquelle le volet de ventilation (7) s'appuie sur le cadre (2) et ferme l'ouverture (3) dans ledit cadre (2). Le volet de ventilation (7) est coulé par injection depuis son extrémité libre sur le cadre (2) et comporte devant une zone de contact (8) avec le cadre (2), sur sa face opposée audit cadre, une rainure (10) délimitée par une arête vive.

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