Radial lip oil seal
US4969653A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1989 |
| Grant date | Nov 13, 1990 |
| Priority date | — |
| Expiry date | Oct 4, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3252
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shaft seal includes a rigid case and an elastomeric seal body affixed thereto. The seal body member includes a primary sealing lip and a secondary sealing lip axially spaced from one another by an intermediate flex section. The sealing surfaces of both sealing lips are lined with a singular piece of low friction material in the form of a single annular wafer having radially inner and outer liner portions covering the primary and secondary sealing lips. The wafer is formed with a weakened material section intermediate the inner and outer annular liner portions for increasing the flexibility and independent operation of each sealing lip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.