Patent ID: 6131389
Filing Date: 2000-10-17
Classification: B62D

Abstract:
Hydrostatic steering device with first and second steering systems, each having a pump, a steering unit provided with an input shaft and a steering motor connected to the steering unit by means of two motor hoses, a steering wheel common for both steering units, both steering motors being mechanically connected with each other on an output side, a change-over valve having an operation position creating a hydraulic connection of the motor hoses of the second steering system, leaving the motor hoses of the first steering system in a separated state, an emergency position, creating a hydraulic connection of the motor hoses of the first steering system, leaving the motor hoses of the second steering system in a separated state, and a switching device reacting on the occurrence of a fault in the first steering system and switching the change-over valve from the operation position to the emergency position.