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:
Jul. 23, 2002
Filed:
Sep. 21, 2000
Applicant:
Inventor:
Heinz Mueller, Remseck, DE;
Assignee:
Filterwerk Mann & Hummel GmbH, Ludwigsburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 3/530 ; B01D 3/5147 ;
U.S. Cl.
CPC ...
B01D 3/530 ; B01D 3/5147 ;
Abstract
An air filter for an internal combustion engine having a housing ( ) and a filter element ( ) which is arranged in the housing. The housing ( ) is provided with a filtered air outlet ( ) and at least one untreated air inlet ( ) with a screen ( ) or a closable flap. An auxiliary untreated air inlet ( ) which is closed by a flap valve ( ) is also provided. The screen ( ) or the flap of the untreated air inlet ( ) opens when the temperature of the untreated air is above a certain threshold value and closes when the temperature of the untreated air is below a certain threshold value.