Tight shutoff butterfly valve
US4148458A · kind A · utility
9Cited by
7References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 13, 1977 |
| Grant date | Apr 10, 1979 |
| Priority date | — |
| Expiry date | Jun 13, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7036
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A butterfly valve assembly to be installed between pipeline flanges and secured by flange bolts is disclosed. A cylindrical valve body ring, having a cylindrical bore and a face portion at each end, has a resilient elastomer lining which covers the bore and extends over a portion of the faces. A disk is attached to a shaft which extends through the body ring and liner transverse to the axis of the body ring. The valve assembly has at least one face plate with an opening which circumscribes the portion of the liner extending over the face of the body ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.