LEVEL CONTROL IN A MECHANICAL SUSPENSION FOR A WORKING VEHICLE
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United States of America Patent
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app pub date -
Apr 11, 2017
filing date -
Apr 11, 2016
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Abstract
A working vehicle has an undercarriage assembly configured to drive the working vehicle over ground and a chassis connected to the undercarriage assembly through a suspension system. The suspension system includes a mechanical spring, the mechanical spring having a first end connected to the undercarriage assembly and a second end. The suspension system includes a hydraulic cylinder, the hydraulic cylinder having a first portion that mounts to the second end of the mechanical spring and a second portion that connects to the chassis such that the mechanical spring and hydraulic cylinder are arranged in series between the undercarriage assembly and the chassis to modify the height of the chassis. The suspension system is configured to level the chassis to offset the effects of ballast weights or other external loads such as from a drawbar or 3-point hitch.
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