Ball valve
US7758016B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2007 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | Sep 5, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ball valve comprising a housing, a ball seat disposed within the housing, and a ball rotatably movable within the housing, and engageable with the ball seat in order to provide a seal within the ball valve and the ball seat, wherein the ball seat comprises multiple seat surfaces independently capable of engaging the ball, a first seat surface engaging the ball to form a first seal, and being arranged such that pressure acting from above pushes the first seat surface against the ball; a second seat surface being movable relative to the first seat surface and engaging the ball to form a second seal, the second seat surface being arranged such that pressure acting from below causes the second seat surface to move relative to the first seat surface and pushes the second seat surface into contact with the ball.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.