Lip seal device
US5056799A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1990 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Feb 26, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3232
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A lip seal device for sealing the gap between a housing and a rotary shaft comprises a case surrounding the rotary shaft, and a lip seal located on the case and curved toward a sealed fluid and having a sealing surface in sliding contact with an outer circumferential surfaces of the rotary shaft. The lip seal device includes a seal member on the seal surface for sealing a gap between the seal surface and the rotary shaft. The seal member includes a primary annular groove and an auxiliary seal means. The primary annular groove extends continuously in the circumferential direction of the rotary shaft. The auxiliary seal means, either projections or grooves are provided adjacent to the primary annular groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.