Shaft seal for butterfly valve
US5295659A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1993 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Jul 26, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K1/228
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention comprises an improved two-way dynamic shaft-sealing member for a fluid transport system having a butterfly valve with an inflatable seal with the improved shaft-sealing member including a rigid race secured to and carried by the interface portion of the inflatable seal to maintain the integrity of the interface portion of the seal with a compressible sealing ring located in the race and held in confinement by the race to hold the sealing ring in a sealing condition against the inside of the race and the outside of the shaft to prevent fluids from escaping therepast as the shaft is moved or the inflatable seal is inflated or deflated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.