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:
Sep. 25, 2001
Filed:
Feb. 25, 1999
Sudhan S. Misra, North Wales, PA (US);
Franz M. Wagner, Zionsville, IL (US);
Stephen L. Mraz, Warrington, PA (US);
C & D Charter Holdings, Inc., Wilmington, DE (US);
Abstract
A vent valve is capable of mechanical attachment to a lead acid battery through vent hole structure provided in the case cover. The vent valve is a molded hollow tubular housing having a cup portion, the bottom of which rests atop the battery case, and a neck portion extending through an opening into the battery case. The neck carries cam members on its outer surface which are engaged by similar opposed surfaces or pins on a portion of the case so that, when the cup bottom is seated on a sealing gasket on the case cover and the vent valve is rotated, it is secured and sealed to the case cover. A barrier extends across the inside of the vent valve housing and blocks passage of gases. A pair of oppositely directed valve openings through the barrier establish vent passages which are defined by nozzles protruding through the barrier in opposite directions. Each nozzle is covered by a resilient cup valve member arranged to yield to a higher pressure within a cup at predetermined pressure differentials. Limit means are positioned relative to the cup members to limit the amount of movement of the respective cups away from its nozzle.