Dual steering system for off-highway vehicles
US4190130A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Sep 11, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/32
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A dual vehicular steering system with a primary system for normal operation and a secondary system for emergency operation triggered by pressure sensitive switching and valving means. Both systems have in common a pair of single rod hydraulic steering cylinders with each cylinder being connected to a steerable wheel of the vehicle, a vehicular engine and hydraulic fluid stored in a tank. Cylinder shuttle valves connected to each steering cylinder function as gate devices to separate the primary steering system from the secondary system. The primary system includes a main pump driven by the engine, a high pressure filter, a priority flow divider to divert fluid in excess of an acceptable flow level, a control valve, an integrated valve package to proportionately regulate fluid flow between the cylinders, and means to direct fluid from the tank to the pump, through the filter, through the priority flow divider, through the control valve, through the integrated valve package and to the steering cylinders. The secondary system includes a secondary pump, an electric motor driven by the battery to drive the secondary pump, and means to conduct fluid from the secondary pump, through the s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.