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. 15, 2016
Filed:
Sep. 13, 2013
Dräger Safety Ag & Co. Kgaa, Lübeck, DE;
Michael Rosert, Timmendorfer Strand, DE;
Dennis Leske, Eutin, DE;
Harald Heyer, Klein Wesenberg, DE;
Thomas Pancur, Altenholz, DE;
Dräger Safety AG & Co. KGaA, Lübeck, DE;
Abstract
A directional valve for a respirator product includes a valve housing () and a valve seat () for receiving a flexible valve membrane (). The valve seat has a circular and essentially flat sealing surface () surrounding an opening (), which is sealingly covered by the valve membrane during an inspiration phase. A fixing lug (), on the valve housing (), fixes the valve membrane in the valve seat and is arranged offset in relation to the center of the valve membrane, such that an entire circumferential surface of the valve membrane is lifted off from the sealing surface during an expiration phase. The fixing lug is directed essentially at right angles to a flow plane formed by the opening. A counter-support (), within the opening, is arranged opposite the fixing lug such that the valve membrane is mounted with fixed clamping action, between the fixing lug and the counter-support.