Annular preloaded seal for a sliding piston in cylindrical tank
US5042365A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1983 |
| Grant date | Aug 27, 1991 |
| Priority date | — |
| Expiry date | Aug 15, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/917
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A peripheral sliding seal for sealing the liquid propellant in a cylindrical tank 10 containing a piston 14 for positive expulsion of the liquid propellant. The seal comprises a peripheral inward flange member 16 around the piston periphery adjacent the inner wall of the tank, an annular pressure ring 18 bonded to the flange member 16 and forming several recesses therewith, one recess containing a compliant sealing ring 20 and the other containing a shear seal 32 bonded both to the flange member 16 and to the entrance head 12 of the tank. The bonds prevent internal and external leakage of the liquid fuel during storage. Pressurization of the piston 14 permits the piston 14 to move and breaks the shear seal 32. The compliant-ring seal slides with the piston 14, the compliant ring 20 being pressed against the inner wall of the tank by resilient fingers 34 of the pressure ring 18 to form a sliding seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.