Reverse flow blocking device for vehicle ventilation system

Details Reverse flow blocking device for vehicle ventilation system Reverse flow blocking device for vehicle ventilation system

1991-06-24

1993-11-23

Joyce, Harold

Ventilation

Vehicle

Having outlet airway

137855, B60H 126

Patent

active

052638952

ABSTRACT:
A return air blocking device (1) in the nature of a check valve for use in the ventilation system for the interior of a motor vehicle. The device comprises a housing or main frame (2) attachable in a vehicle support panel by insertion into a panel aperture. A flap-type valve element is directly connected with housing (2). Preferably, housing (2) includes a grating structure against which the flap-type valve element rests while in the closed position.

REFERENCES:
patent: 3405968 (1968-10-01), Feles et al.
patent: 4449549 (1984-05-01), Weck
patent: 4667578 (1987-05-01), Hagenah
patent: 4781106 (1988-11-01), Frien
patent: 4924907 (1990-05-01), Palmer

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