Sealing device designed to achieve sealing between two parts having a possibility of relative rotation to a limited extent
US5050894A · kind A · utility
10Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1990 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Jan 17, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K41/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
To set up sealing between two parts, having the possibility of relative rotation to a limited extent around a determined axis, a concertina element is used. This concertina element has two rigid, end tubular sections, fixedly joined in an impervious way with respective zones of each of said parts and an intermediate tubular part between said end tubular sections, and is capable of changing shape under torsion around said axis, to an extent that is at least equal to said extent. Thus, all risks of leakage between the two parts are removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.