Metering valve
US8511329B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2012 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Apr 26, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86799
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A metering valve assembly includes a metering valve sleeve and a metering valve spool. The metering valve sleeve includes an inlet window set and an outlet window set with a first outlet window having a first logarithmic contour and a second outlet window having a second logarithmic contour. A ratio of an inner width of the first outlet window to an inner length of the first outlet window is between 1.48 and 1.52. A ratio of an inner width of the second outlet window to an inner length of the second outlet window is between 2.21 and 2.29. The metering valve spool includes first, second, and third cylindrical portions. The metering valve spool is configured to move bi-directionally along a longitudinal axis of the metering valve sleeve and control fluid flow between the inlet window set and the outlet window set relative to the first, second, and third cylindrical portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.