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:
May. 31, 2011
Filed:
Apr. 18, 2006
Wolfgang Imhof, Kefenrod-Helfersdorf, DE;
Friedrich Kramm, Büdingen, DE;
Christian Recker, Büdingen, DE;
Wolfgang Imhof, Kefenrod-Helfersdorf, DE;
Friedrich Kramm, Büdingen, DE;
Christian Recker, Büdingen, DE;
Deutsche EXIDE GmbH, Budingen, DE;
Abstract
The present invention concerns a vent valve for acid batteries comprising a substantially cylindrical plug portion () which is designed for being brought into engagement with a cell opening of the acid battery () and which has at least one passage opening communicating the cell interior of the acid battery with the ambient atmosphere, wherein provided in the passage opening is a valve arrangement () having an inlet communicating with the cell interior and an outlet connected to the ambient atmosphere. In order to provide a vent valve for an acid battery, in particular an acid battery with fixed electrolyte, which is simple and inexpensive to produce and which affords improved protection against the escape of battery acid, it is proposed in accordance with the invention that at least one turbulence chamber () follows the passage opening of the plug portion () in the direction of the cell interior and a gas-permeable filter unit (') follows the turbulence chamber ().