The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 1993
Filed:
Jun. 24, 1991
Applicant:
Inventors:
Willibald Kraus, Grunstadt, DE;
Hans-Werner Ruckwardt, Eisenberg, DE;
Assignee:
TRW United-Carr GmbH & Co. KG, Alsenborn, DE;
Primary Examiner:
Int. Cl.
CPC ...
B60H / ;
U.S. Cl.
CPC ...
454162 ; 137855 ;
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.