Robert W Ferrin

US Patent:

7435395, Oct 14, 2008

Filed:

Jun 9, 2004

Appl. No.:

10/863882

Inventors:

Richard E. Durkot - East Walpole MA, US
Paul A. Christian - Norton MA, US
Dean MacNeil - Cambridge MA, US
James R. Costanzo - Danbury CT, US
David Anglin - Brookfield CT, US
Mark Ashbolt - Newtown CT, US
Derek Bobowick - Sandy Hook CT, US
Robert S. Ferrin - Bethel CT, US
Anthony Malgioglio - Stamford CT, US
Brien Merrill - New Fairfield CT, US
Alexander Shelekhin - Ridgefield CT, US
Steven J. Specht - Brookfield CT, US
Matthew Sylvestre - Woodbury CT, US
Philip Trainer - Sandy Hook CT, US
Robert A. Yoppolo - New Milford CT, US

Assignee:

The Gillette Company - Boston MA

International Classification:

H01M 6/04
H01M 2/00
H01M 2/02
H01M 4/58
H01M 4/00

US Classification:

422206, 429163, 429179, 429229, 429223, 429122

Abstract:

An alkaline cell having a flat casing, preferably of cuboid shape. The cell can have an anode comprising zinc and a cathode comprising nickel oxyhydroxide. The casing can have a relatively small overall thickness, typically between about 5 and 10 mm, but may be larger. Cell contents can be supplied through an open end in the casing and an end cap assembly inserted therein to seal the cell. The end cap assembly includes a vent mechanism, preferably a grooved vent, which can activate, when gas pressure within the cell reaches a threshold level typically between about 250 and 800 psig (1724×10and 5515×10pascal gage). The cell can have a supplemental vent mechanism such as a laser welded region on the surface of the casing which may activate at higher pressure levels.