Hydraulic steering system for articulated automotive vehicle
US5193637A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1991 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Mar 26, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D12/00
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydraulic steering system for turning two mutually articulated vehicle-halves (13, 14) relative to one another with the aid of two hydraulic piston-cylinder devices (11, 12) includes a control valve (17) which will normally connect the piston-cylinder devices in a manner such that the devices operate as single-acting piston-cylinder devices. When abnormally high steering torque prevails, however, and the oil pressure rises correspondingly above a pre-determined value, the setting of the control valve is adjusted by these oil pressures so that the valve connects the piston-cylinder devices in a manner which causes the devices to operate as double-acting piston-cylinder devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.