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:
Aug. 17, 2021
Filed:
Aug. 09, 2017
W. L. Gore & Associates Gmbh, Putzbrunn, DE;
Alexander Zaggl, Aying, DE;
Michael Rittmann, Putzbrunn, DE;
W. L. Gore & Associates GmbH, Putzbrunn, DE;
Abstract
A check valve () for a through hole in a compartment wall () comprises an elastic membrane () covering an open end () of a flow passage (), a base () to which the elastic membrane () is fixed, and a protector () covering at least a portion of the elastic membrane (), wherein the elastic membrane is fixed to the base in a state where it is elastically stretched over and forced against a sealing surface () surrounding the open end () so as to seal the flow passage (). The elastic membrane lifts from the sealing surface when the pressure in the flow passage is high. The elastic membrane may be air- or gas-permeable and, preferably, waterproof so as to impart a low pressure venting functionality to the check valve.