Seals
US5722637A · kind A · utility
9Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1996 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | May 22, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K25/005
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A balance seal for a valve, said seal comprising an annular seal element retained within a valve housing. The seal element has a seal well which links with the pressure on one side of the valve to urge a flexible seal leg with a foot into engagement with a moveable valve plug. The seal leg is prevented by an annular retainer from over-deflection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.