Tillage implement with gauge wheels having hydraulic down-pressure
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United States of America Patent
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Oct 11, 2022
Grant Date -
Mar 11, 2021
app pub date -
Nov 5, 2018
filing date -
Dec 21, 2017
priority date (Note) -
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Abstract
A tillage implement has a frame with a center section and first and second outer wing sections hingedly attached to respective outer ends of the center section. Controlling a pressure in a secondary side of a hydraulic circuit enables adjustment of the downward pressure precharge provided by hydraulic cylinders based on a desired stiffness of the implement. Flow from a hydraulic supply through a pressure-reducing valve puts the downward pressure precharge on gauge wheels. Once this desired downward pressure precharge has been achieved, flow from the hydraulic supply is shut off and a check valve holds the pressure such that the hydraulic cylinders hold the gauge wheels in the desired position.
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