Butterfly valve
US3990675A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1974 |
| Grant date | Nov 9, 1976 |
| Priority date | — |
| Expiry date | Dec 10, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7036
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A butterfly valve for pipes having smooth ends comprising a body constituted by a metal casing of generally tubular shape with two dimensional bosses provided with coaxial passages. A layer of elastomer material externally and internally envelops the totality of the metal casing. Two shafts are rotatably mounted in the coaxial passages and support a butterfly within the body. The body includes at one of the extremities thereof an end portion which permits connection of the valve to a pipe by interfitting thereof. The other end of the body can be connected in various ways with the other pipe either as a male or a female fitting with associated annular lips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.