Hydraulic cylinder for an agricultural row unit having an uplift accumulator and a down pressure accumulator
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United States of America Patent
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Jun 20, 2017
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N/A
app pub date -
Jan 9, 2015
filing date -
Jan 9, 2015
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Abstract
An agricultural row unit includes a gauge wheel that engages the soil to control the elevation of the row unit; a soil-engaging tool mounted to permit vertical movement of the tool relative to the row unit; a hydraulic cylinder having a movable rod and containing a pressurized hydraulic fluid for applying a down force to the the tool to urge the tool into the soil; an uplift accumulator housed within the rod and exposed to the hydraulic fluid to permit upward movement of the tool in response to increased resistance by the soil to downward movement of the tool, while applying a force resisting upward movement of the tool; and a down pressure accumulator coupled to the hydraulic cylinder to permit downward movement of the tool in response to decreased resistance by the soil to downward movement of the tool, while applying a force resisting downward movement of the tool.
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