Patent · US Expired

Annular seal

US4240643A · kind A · utility

13Cited by

3References

6Claims

0Family size

Assignee

Carl Freudenberg KG · DE

Inventors

Bernd-Dietmar Becker · Berlin, DE
Hans Forch · Birkenau, DE
Adam Helfrich · Hösbach, DE
Gottfried Jung · Fürth, DE

Key dates

Filing date	Aug 31, 1978
Grant date	Dec 23, 1980
Priority date	—
Expiry date	Aug 31, 1998

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S277/925
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

An annular seal for a shaft comprising an annular elastomeric lip 2 having an annular rim 2.1, and an annular reinforcing member 1 provided with a groove into which rim 2.1 fits. The portion of the member 1 spaced from the groove is compressible and in unassembled state is larger than in assembled state, the compression serving to lock the seal together. Multiple lips and/or grooves may be provided.

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