Reversed, double-helical bellows seal
US6614508B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2001 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Aug 16, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A double bellows seal including a plurality of rings having first and second end rings, a middle ring, a first bellows, and a second bellows. The first bellows is formed from a flexible material that is sealingly connected between the first end ring and the middle ring, and it has a twist bias in a first rotational direction relative to an axis of the rings. The second bellows is formed from a flexible material that is sealingly connected between the second end ring and the middle ring. The second bellows has a twist bias in a second rotational direction relative to an axis of the rings that is opposite that of the first rotational direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.