Rotary piston engine piston having an internal seal
US4090824A · kind A · utility
1Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1977 |
| Grant date | May 23, 1978 |
| Priority date | — |
| Expiry date | Apr 6, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49234
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Internal seal for the piston of a rotary piston engine. The seal includes a slide ring with an annular scraping edge of L-shaped cross-section with an axial flange and a flange extending radially outward. The slide ring includes an axially extending ring with one face together with its inner periphery forming the scraping edge. The slide ring includes a radially extending ring with its inner periphery shrunk onto the outer periphery of the axial ring near the one face. The axial ring consists of a material having a smaller coefficient of heat expansion than the radial ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.