Patent ID: 9681601
Date: 2017-06-20
CPC Classifications: A01B,A01C,F16F

Claim:
1. An agricultural row unit comprising a frame having a gauge wheel that engages the soil to control the elevation of the frame, a soil-engaging tool coupled to said frame to permit vertical movement of said tool relative to said frame, a hydraulic cylinder having a movable rod and containing a pressurized hydraulic fluid for applying a down force to said frame or said tool to urge the tool into the soil, an uplift accumulator in fluid communication with said moveable rod to upwardly bias the frame or tool to reduce the gravitational weight of said tool, and a down pressure accumulator coupled to said hydraulic cylinder to permit downward movement of said tool in response to increased resistance by the soil to downward movement of said tool, while applying a force resisting said upward movement of said tool.