Richard J Bouffard from Saint Petersburg, FL, age 65

Battery Cell With Improved Pressure Relief Vent
view source
US Patent:

8076015, Dec 13, 2011
Filed:

Jan 31, 2007
Appl. No.:

11/700638
Inventors:

Richard L. Bouffard - Litchfield CT, US
Peter M. Lewis - Avon Lake OH, US
Huaxin Li - Rochester Hills MI, US
Warren Emerson Sweet - Naugatuck CT, US
James X. Wu - North Olmsted OH, US
Assignee:

Eveready Battery Company, Inc. - St. Louis MO
International Classification:

H01M 2/12
H01M 2/08
US Classification:

429 56, 429 82, 429174
Abstract:

An electrochemical cell with a pressure relief vent formed in a metal plate disposed in at least one of the closed end and the open end of the container. The pressure relief vent has an annular ring that includes a reduced thickness groove, interrupted in at least two places by unthinned sections of the plate. When the vent opens to relieve pressure from within the cell, the area of the plate within the annular ring remains attached to the remainder of the plate by at least one of the unthinned sections. A can with such a pressure relief vent formed in the can bottom is useful as an electrochemical cell container.

Battery Cell With Improved Pressure Relief Vent
view source
US Patent:

20040157115, Aug 12, 2004
Filed:

Feb 11, 2003
Appl. No.:

10/365197
Inventors:

Richard Bouffard - Litchfield CT, US
Peter Lewis - Avon Lake OH, US
Huaxin Li - Rochester Hills MI, US
Paul Elsdon - Wolcott CT, US
Richard Sosnovich - Beacon Falls CT, US
Warren Sweet - Naugatuck CT, US
Robert Ray - Strongsville OH, US
James Wu - North Olmsted OH, US
International Classification:

H01M002/12
H01M002/02
US Classification:

429/056000, 429/082000, 429/176000, 220/367100
Abstract:

An electrochemical cell with a pressure relief vent formed in a metal plate disposed in at least one of the closed end and the open end of the container. The pressure relief vent has an annular ring that includes a reduced thickness groove, interrupted in at least two places by unthinned sections of the plate. When the vent opens to relieve pressure from within the cell, the area of the plate within the annular ring remains attached to the remainder of the plate by at least one of the unthinned sections. A can with such a pressure relief vent formed in the can bottom is useful as an electrochemical cell container.

System And Process For Forming Battery Cans
view source
US Patent:

20060159989, Jul 20, 2006
Filed:

Jan 19, 2005
Appl. No.:

11/039424
Inventors:

Richard Bouffard - Litchfield CT, US
Assignee:

Truelove & Maclean, Inc. - Waterbury CT
International Classification:

H01M 2/02
B21C 23/00
B21D 11/10
US Classification:

429164000, 072256000, 072379400
Abstract:

A process for producing a battery can in a transfer press comprises drawing a metal cup in a first station to form an elongated cylinder, ironing the elongated cylinder in a second station, and redrawing the elongated cylinder in a third station. In either or both the drawing and ironing steps, the cup or the elongated cylinder may be processed in more than one station. The process includes a final redraw station for redrawing the cylinder so as to roughen the inner surface of the battery can to improve its electrical properties.