Antifriction fluid seal assembly
US4421330A · kind A · utility
22Cited by
4References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1982 |
| Grant date | Dec 20, 1983 |
| Priority date | — |
| Expiry date | Feb 8, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/946
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A two-stage fluid seal assembly is provided for sealing between relatively moving parts, such as a piston and cylinder. The assembly comprises a hard-sealing, non-resilient material effective at high pressure and a resilient soft-sealing material effective at low pressures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.