Spring seal
US4229013A · kind A · utility
9Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1979 |
| Grant date | Oct 21, 1980 |
| Priority date | — |
| Expiry date | Jul 2, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2127/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A sealing ring firmly grips a movable piston, performs the normal sealing function, and when pressure is released on the piston the sealing ring pulls back on the piston so as to retract the piston. The sealing ring is designed so as to fit in a conventional seal or "O" ring groove without any modification of the groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.