Metering valve
US4637420A · kind A · utility
11Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1985 |
| Grant date | Jan 20, 1987 |
| Priority date | — |
| Expiry date | Dec 16, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/4273
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rotary metering valve (10) includes a pair of windows (145, 200) in mutual registry with one another, the windows defining a flow passage through the valve. The geometries of windows are such that closing the valve sweeps contaminants trapped therein, inwardly, thereby enhancing the effectiveness of the output torque of the valve's actuator (75) in breaking apart the contaminants for subsequent removal by flow through the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.