Row unit for agricultural implement
First Claim
1. An agricultural implement for use with a towing frame attached to a tractor, said agricultural implement comprisingmultiple row units each of which comprisesa linkage pivotably coupled to said towing frame,an agricultural tool pivotably coupled to the row unit for vertical pivoting movement, anda hydraulic cylinder pivotably coupled to said linkage for controlling a downforce on said row unit, anda hydraulic control system for supplying pressurized hydraulic fluid to the hydraulic cylinders of said row units through separate feed lines and separate controllable valves to permit separate control of the downforce on each separate row unit.
4 Assignments
0 Petitions
Accused Products
Abstract
An agricultural row unit for use with a towing frame hitched to a tractor includes an attachment frame adapted to be rigidly connected to the towing frame, a linkage pivotably coupled to the attachment frame, and a row unit frame having a leading end pivotably coupled to the linkage to permit vertical pivoting movement of the row unit frame relative to the attachment frame. A hydraulic cylinder coupled to the attachment frame and the linkage, for urging the row unit frame downwardly toward the soil, includes a movable ram extending into the cylinder, and a hydraulic-fluid cavity within the cylinder for receiving pressurized hydraulic fluid for advancing the ram in a direction that pivots the linkage and the row unit frame downwardly toward the soil. An accumulator positioned adjacent to the hydraulic cylinder has a fluid chamber containing a diaphragm, with the portion of the chamber on one side of the diaphragm being connected to the hydraulic-fluid cavity in the hydraulic cylinder, and the portion of the chamber on the other side of the diaphragm containing a pressurized gas.
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Citations
10 Claims
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1. An agricultural implement for use with a towing frame attached to a tractor, said agricultural implement comprising
multiple row units each of which comprises a linkage pivotably coupled to said towing frame, an agricultural tool pivotably coupled to the row unit for vertical pivoting movement, and a hydraulic cylinder pivotably coupled to said linkage for controlling a downforce on said row unit, and a hydraulic control system for supplying pressurized hydraulic fluid to the hydraulic cylinders of said row units through separate feed lines and separate controllable valves to permit separate control of the downforce on each separate row unit.
Specification