Seal assembly with two sealing mechanisms for providing static and dynamic sealing
US6547250B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2000 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Aug 21, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/932
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A seal assembly for providing sealing between a movable cylindrical body and a housing body comprises separate sealing mechanisms for providing static and dynamic sealing. The seal assembly is associated in fixed relationship with either the cylindrical body or the housing body and provides a static seal with the body it is associated with and a dynamic seal with the body that moves relative to the seal assembly. The static sealing mechanism is temperature-activated so that within the operating temperature range, a metallic member of the static seal mechanism is pressed tightly against the associated body to provide a fluid tight static seal. The temperature-activation is caused by the metallic member having a different thermal expansion coefficient than the associated body. The dynamic seal may employ known dynamic sealing mechanisms such as spring-energized seals, interference fit seals, and/or temperature-activated seals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.