Butterfly valve and system employing same and method for using same field
US8763987B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2009 |
| Grant date | Jul 1, 2014 |
| Priority date | — |
| Expiry date | Nov 7, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/6164
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A butterfly valve comprises: a body including a valve opening; and a flapper rotatably mounted about a rotation axis so as to be movable relative to the valve opening. The flapper is rotatable at least 180° about the rotation axis so that the flapper is movable to at least one fully opened position, at least one fully closed position 90° apart from the fully opened position, and a third position, either fully opened or fully closed, 180° from the other like position. In one embodiment the flapper is rotatable at least 360° about the rotation axis so that the flapper is movable to each of two opened positions 180° apart, and two closed positions 180° apart from each other and 90° and 270° apart from each of the fully opened positions. The valve can be easily calibrated and controlled, and cleaned to extend the useful service life between cleanings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.