Bi-directional flow control valve
US6167906A · kind A · utility
17Cited by
3References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1999 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | Jun 25, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7788
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A bi-directional flow control valve includes a two-port housing, and a hollow cage within the housing. The hollow cage has rows of cross-sectional holes that communicate with the ports. A hollow compensating spool is slidably arranged within the hollow cage between the cross-sectional holes. Pressure differential between the ports induces movement in the compensating spool. This movement causes the compensating spool to reduce the opening of one row of cross-sectional holes and increase the opening of the other. In this manner, the valve provides consistent flow control characteristics in each flow direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.