Polytetrafluoroethylene lip seal
US3995868A · kind A · utility
14Cited by
2References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1973 |
| Grant date | Dec 7, 1976 |
| Priority date | — |
| Expiry date | Dec 20, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/937
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention is directed to an improved method of forming and installing polytetrafluoroethylene (PTFE) lip seals and to a novel PTFE lip seal. The lip seals are formed by taking a flat, annular PTFE washer having given dimensions and stretching it over a tapered mandrel by pushing it toward the direction from which the fluid pressure will come in the sealing operation. The finished PTFE lip seals have a curved configuration. Both O.D. and I.D. lip seals are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.