Fluid controller
US7610935B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 2006 |
| Grant date | Nov 3, 2009 |
| Priority date | — |
| Expiry date | Apr 26, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86662
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention provides a fluid controller, e.g. for a hydrostatic power steering. The controller comprises a cylindrical valve member cooperating with a housing to define at least one fluid path from a pressure source to a steering cylinder. The valve member is rotatable in the housing and comprises a sleeve and a spool, wherein the spool is rotatable within the sleeve. The fluid flow is metered by a flow meter, and the valve member comprises a plurality of meter ports communicating the fluid between the valve member and the flow meter. To obtain less friction between the sleeve and the housing and between the sleeve and the spool, the meter ports are grouped in two groups in which groups the ports are in mutually fluid communication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.