Hydraulic steering arrangement
AssigneeSauer-Danfoss Holding A/S
InventorsPeter Gade Peistrup, John Børsting Jensen, John Kristensen
Life of this patent
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Abstract
Hydraulic steering arrangement (15) with a steering handwheel (2), which is connected with a manual. pump (3), a pump (18) supplying hydraulic fluid, a steering motor (12) and a steering valve (15) arranged between pump (18) and steering motor (12) and having a valve element (20) steering the flow of hydraulic fluid between the pump (18) and the steering motor (12), the valve element (20) being displaceable by hydraulic pressures originating from the manual pump. In such a steering arrangement it is wanted to create the opportunity of implementing various functions, without having to abandon the ordinary hydraulic control. For this purpose, the valve element (20) has an additional drive (31).
Claims13
Hydraulic steering arrangement comprising a steering handwheel which is connected to a manual pump, a pump for supplying hydraulic fluid, a steering motor, a steering valve arranged between the pump and the steering motor and having a valve element for controlling the flow of hydraulic fluid between the pump and the steering motor, means connecting the valve element to the manual pump so that the valve element is displaceable by hydraulic energy originating from the manual pump, and including an additional drive for displacing the valve element, and including means to control the additional drive such that the manual pump exerts larger force on the valve element than the additional drive.
Dependencies are inferred from the claim text.