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. 12, 1998
Filed:
Feb. 22, 1996
Christopher L DePalma, Framingham, MA (US);
Lucian P Fontaine, Lincoln, RI (US);
Peter Rick Moses, Winham, NH (US);
Marian Wiacek, Holliston, MA (US);
Robert A Yoppolo, Woonsocket, RI (US);
Peter Pope, Balcombe, GB;
Francis Bruce Tubby, Durham, CT (US);
Douglas J Woodnorth, Needham, MA (US);
Duracell Inc., Bethel, CT (US);
Abstract
An electrochemical cell has a wheel shaped, molded plastic seal member of a unitary construction which includes a central cylindrical hub from which depend in outward radial sequence, an annular pressure vent, a boss, a downward projecting skirt, an annular flexure means for providing radial movement and an outer rim terminating at its periphery in a cylindrical wall. The pressure vent includes a thin membrane ring depending from the hub which joins the hub to an annular diaphragm. A hinge ring joins the periphery of the diaphragm to the boss. The seal member is designed so that the membrane ring fails primarily in shear at excessive cell pressure which makes the vent more reliable and easier to fabricate.