Steering control valve with contoured control surfaces
US5207244A · kind A · utility
7Cited by
14References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1992 |
| Grant date | May 4, 1993 |
| Priority date | — |
| Expiry date | Sep 21, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86662
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A valve for controlling flow of hydraulic fluid. The valve includes a valve sleeve and a valve core. The core is disposed within the sleeve. The core and sleeve are relatively rotatable. The sleeve has grooves connected to a utilization device. The core has grooves connected to a fluid supply and reservoir. The core and sleeve have lands which radially overlap during relative rotation of said core and sleeve to restrict fluid flow from a portion of the grooves in the sleeve to the grooves in the core connected to the reservoir. The lands on the sleeve have chamfered end faces with tapered segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.