Fluid seal with integral check valve
US5167419A · kind A · utility
31Cited by
16References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1991 |
| Grant date | Dec 1, 1992 |
| Priority date | — |
| Expiry date | Oct 22, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3232
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention is a fluid seal adapted to be disposed about a cylindrical shaft. The fluid seal includes a body portion having an aperture extending axially therethrough and adapted to be disposed about the shaft. The fluid seal also includes a first sealing lip extending from the body portion and adapted to contact the shaft. The fluid seal further includes a second sealing lip extending from the body portion and having a check valve for allowing one way fluid flow through the second sealing lip at a desired pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.