Patent · US Expired

Radial shaft seal

US6520506B2 · kind B2 · utility

10Cited by

4References

30Claims

0Family size

Assignee

Firma Carl Freudenberg · DE

Inventors

Hans Reinhardt · Bretten, DE
Rolf Stadler · Visp, CH
Rolf Vogt · Oftersheim, DE

Key dates

Filing date	Apr 20, 2001
Grant date	Feb 18, 2003
Priority date	—
Expiry date	Apr 20, 2021

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16J15/3208
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A radial shaft seal, which includes a ring-shaped, metal supporting body and a sealing lip disposed thereon, in order to separate a hydraulic side that is particularly under high pressure, from an atmospheric side, the sealing lip being pressed onto the shaft by an annular helical spring. In an uninstalled sealing ring, the working plane of the annular helical spring has a value x that is less than zero with respect to the working plane of the sealing edge, and in an installed sealing ring, the two working planes are approximately coplanar.

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