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:
Apr. 17, 2012
Filed:
May. 24, 2006
Robert E. Ray, Strongsville, OH (US);
John C. Stearns, Medina, OH (US);
Walter B. Ebner, Terryville, CT (US);
Richard L. Bouffard, Litchfield, CT (US);
R. Justin Begg, Brunswick, OH (US);
Robert E. Ray, Strongsville, OH (US);
John C. Stearns, Medina, OH (US);
Walter B. Ebner, Terryville, CT (US);
Richard L. Bouffard, Litchfield, CT (US);
R. Justin Begg, Brunswick, OH (US);
Eveready Battery Company, Inc., St. Louis, MO (US);
Abstract
An electrochemical cell is provided with an enhanced pressure relief vent formed in a closed end of the cell container that achieves effective venting of gas from the closed end of the container. The electrochemical cell including a container having a first end, a second end, a side wall extending between the first and second ends, and an end wall extending across the first end. The cell has a positive electrode, a negative, and an aqueous alkaline electrolyte, all disposed in the container. The cell further includes a pressure relief vent having a reduced thickness groove formed in the end wall of the container. The reduced thickness groove is formed having eight segments extending radially from a central location. A cover is welded on the end wall of the container via at least three welds, wherein the angular spacing between two adjacent welds is greater than 120°.