Patent · US Expired

Closure for galvanic elements

US4309493A · kind A · utility

11Cited by

3References

9Claims

0Family size

Assignee

Varta Batterie Aktiengesellschaft · DE

Inventors

Thomas Kühl · Inzigkofen, DE
Hans Sauer · Bamberg, DE

Key dates

Filing date	Aug 8, 1980
Grant date	Jan 5, 1982
Priority date	—
Expiry date	Aug 8, 2000

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A closure for a galvanic element, and particularly a cylindrical cell, is formed in substance of a cap-like or toroidal, resilient member, whose upstanding outer rim is segmented by slits into distinct flaps. These are therefore capable of acting resiliently in a radial direction and are capable of maintaining in the sealing region a steady sealing pressure between the cup and a plastic closure member. During closing of the cell through crimping, the flaps are supported from inside by a crimper support sleeve. In this way, the plastic of the closure body is plasticized during movement of the crimping tool toward the die.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.