Oil seal comprising lip seal with thermal expansion controlled reinforcing ring
US4747603A · kind A · utility
14Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1986 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Nov 18, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/931
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An oil seal of the type having a metallic reinforcement rig whose outer peripheral portion is oil-tightly fitted into a housing, characterized in that after the formation of fabrication of said metallic reinforcement ring, the latter is subjected to a nitriding hardening process so that its durability of a raw material of said metallic reinforcement ring; and a seal lip of formed over the inner peripheral edge portion of an annular flange portion of said metallic reinforcement ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.