Seal ring and seal device
US7572839B2 · kind B2 · utility
1Cited by
3References
7Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 29, 2004 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Mar 12, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A seal ring (10) of the present invention seals operating oil hermetically and is attached to an annular seal ring groove (16) provided on an outer circumference of a shaft member (12). The seal ring (10) includes fluororesin, modified fluororesin formed by being irradiated with an ionizing radiation in a range from 1 kGy to 10 MGy inclusive in a state of being heated up to a melting point thereof or higher under an inert gas atmosphere with an oxygen partial pressure of 1.33 kPa or less, and synthetic resin having a surface energy ranging from +0 N/cm to 20˜10−5 N/cm inclusive of that of the operating oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.