Ball control valve
US4881718A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 27, 1987 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Nov 27, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K47/08
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ball valve with a port (30) through the ball (26) has a groove associated with each end of the port with each groove (32,34) extending partially around the circumference of the ball. Each groove connects with its end of the port (30) and extends away from the port in the plane of rotation of the ball. The grooves decrease in size as they extend away from the port whereby the grooves serve to control the flow area depending on the degree of rotation of the ball. Diffusers (22,24) in the inlet and outlet of the valve assure that any cavitation will occur within the diffusers which are formed of material adapted to withstand the cavitation forces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.