Radial shaft seal
US6729624B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 2001 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Feb 20, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3284
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A radial shaft seal for dynamic applications is disclosed. The shaft seal has a case member and a resilient sealing body attached to the case member. The sealing body includes an annular elastomeric member and a resinous ring. The elastomeric member has a radially extending section and a distal end. The resinous ring has a radially extending portion and an edge. The radially extending section is contiguous to the radially extending portion to form a composite seal lip body. The composite seal lip body, as installed, is positioned so that the distal end of the radially extending section and the edge of said radially extending portion engage the shaft in fluid tight relation by the elastomeric member and by the reaction forces of the resinous ring. Therefore, a portion of the reaction forces is shared by the edge and the distal end so as to reduce the wear in the distal end. The seal may optionally have one of several pumping features including uni-directional helical ribs, bi-directional helical ribs, unidirectional keel-shaped helical ribs, bi-directional keel shaped helical ribs and undulating pumping members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.