Patent · US Expired

Radial shaft seal ring with backfeed ribs and damming ribs

US4695063A · kind A · utility

19Cited by

5References

6Claims

0Family size

Assignee

Firma Carl Freudenberg · DE

Inventors

Wolfgang Schmitt · Rodgau, DE
Hans Forch · Birkenau, DE

Key dates

Filing date	Nov 7, 1985
Grant date	Sep 22, 1987
Priority date	—
Expiry date	Nov 7, 2005

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16J15/324
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A seal ring has an annular sealing lip of a polymeric material which bears resiliently about a shaft rotatable relative thereto with a sealing strip and hydrodynamically acting backfeed ribs to one side of the sealing strip. An annular projection projects from the other side of the sealing strip with a radial clearance between a cylindrical or conical interior surface of the annular projection and the shaft. The annular projection is united with the sealing strip in a bending-resistant manner. Damming ribs protrude uniformally about the interior surface of the annular projection. Each damming rib has a leading surface which makes an obtuse angle with the interior surface and is parallel to the axis thereof.

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