Patent ID: 6513548
Filing Date: 2003-02-04
Classification: B62D,Y10T

Abstract:
Control valves of a hydrostatic steering system, comprising an external body housing a steering valve, a safety valve and a progressive valve, in order to control a hydrostatic steering system, wherein:the steering valve comprising a first cylinder and a second cylinder concentric with a steering shaft, the first cylinder rolling conjointly with said steering shaft by springs and its rotation in relation with the second cylinder limited by bolts, channels formed in contiguous peripheries of said first and second cylinders, said channels forming connected sets, each set having an independent fluid circulation, the safety valve comprising a third cylinder and a first and second piston and a spring and connected to the steering valve, the progression valve comprises a fourth cylinder and a third piston connected to the second piston of the safety valve and operating by a vacuum effect.