Patent · US Expired

Gas and liquid tight pole seal for electric storage batteries, particularly lead storage batteries

US4522899A · kind A · utility

8Cited by

3References

7Claims

0Family size

Assignee

Varta Batterei A.G. · DE

Inventors

Joachim Illmann
Klaus Gummelt · Garbsen, DE

Key dates

Filing date	Sep 16, 1983
Grant date	Jun 11, 1985
Priority date	—
Expiry date	Sep 16, 2003

Classification

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

Abstract

A hermetic pole seal for lead storage batteries which averts the customary use of lead sleeves, involves a first ring-shaped molding surrounding the pole shaft with a rubber-elastic synthetic plastic (thermoplastic rubber) and a second molding covering the former with a less elastic synthetic, which is preferably identical to the case material (e.g. polypropylene), followed by mirror welding to the lid. The sealing of the pole lead-through results from material shrinkage following the molding. In so doing, the different plastics mesh from opposite sides.

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