Hydrostatic steering device steering wheel travel limits
AssigneeDanfoss A/S
InventorsJohannes V. Baatrup, Harry E. Pedersen
Life of this patent
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Abstract
The invention relates to a hydrostatic steering device having a servomotor connectable to wheels to be steered. The travel limits of the servomotor are sensed with position sensors which function to operate a locking apparatus which mechanically prevents further turning of the steering wheel upon a travel limit being reached in either direction.
Claims10
A hydrostatic steering system, comprising, pump and tank means, a steering servomotor having two control ports, valve means having right and left turn positions for directing pressurized fluid from said pump means to either of said control ports and directing exhaust fluid from the other of said control ports to said tank means, steering means for controlling said valve means including shaft means, moveable means moveably responsive to the operation of said servomotor, limiting position sensor means responsive to movement of said moveable means to a limiting position, and locking apparatus means responsive to said sensor means for mechanically stopping movement of said steering shaft means.
Dependencies are inferred from the claim text.