Fluid control valves with angled metering ports
US4646786A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Oct 17, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86734
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Flow control valve includes angled metering ports in the valve sleeve for directing the momentum of the fluid flow against the respective valve flow metering edges in a direction producing an opening reaction force on the valve upon initial valve opening in opposition to the usual axial flow forces tending to close the valve to reduce the flow force gain acting on the valve. Preferably, the angled metering ports are disposed at an angle of approximately 45.degree. or greater from a line perpendicular to the valve axis. Also, a single set of circumferentially spaced angled metering ports is desirably provided for each return or high pressure flow path for producing the desired opening reaction force on the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.