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:
Feb. 03, 2004
Filed:
Dec. 07, 2001
Applicant:
Inventor:
Torsten Hilpert, Erdmannhausen, DE;
Assignee:
Filterwerk Mann & Hummel GmbH, Ludwigsburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01M 1/300 ;
U.S. Cl.
CPC ...
F01M 1/300 ;
Abstract
A pressure control valve with a pressurized membrane ( ) for closing and opening a gas passage ( ) in which a valve chamber ( ) pressurized with an ambient pressure (P ) is located on the side of membrane ( ) that is opposite the gas passage ( ) to be closed and opened. The pressure control valve ( ) is arranged in such a way that the exit of the gas passage ( ) leads directly into a volume with ambient pressure (P ). The membrane ( ) includes a ventilation hole ( ) through which the valve chamber ( ) is directly pressurized with ambient pressure (P ).