Patent · US Expired

Forced ventilation system for motor vehicles

US6132308A · kind A · utility

12Cited by

7References

14Claims

0Family size

Assignee

Wegu-und Kunststoffwerke GmbH & Co. KG · DE

Inventors

Michael Dietz · Treysa, DE
Thorsten Hildebrand · Fritzlar, DE
Joachim Heidel · Kassel, DE

Key dates

Filing date	Jan 15, 1999
Grant date	Oct 17, 2000
Priority date	—
Expiry date	Jan 15, 2019

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60R21/164
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

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-molding 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).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.