Steering reaction force control arrangement for a power steering servo valve
US6009903A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1997 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | Apr 22, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86654
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In a steering reaction force control arrangement for a hydraulic servo valve of a power steering system including a rotary spool rotatable received in a control sleeve and having a portion with axially extending V-shaped grooves disposed within a sleeve structure connected, by a conical engagement structure, to the control sleeve, the sleeve structure has radial bores receiving force transmitting balls which are pressed into the V-shaped grooves by a controllable hydraulic pressure so that the rotary spool can be moved relative to the control sleeve only upon the transmission of a torque sufficient to lift the force transmitting balls against the force of the hydraulic fluid by which they are pressed into the grooves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.