Patent ID: 8910582

Claim:
A row unit for a seeding machine comprising: a row unit frame adapted to be mounted to a machine frame; a furrow opener and a furrow depth regulating member both mounted to the row unit frame; and a furrow closing arrangement movably mounted to the row unit frame, the furrow closing arrangement having a four bar linkage with a pivot arm forming a first link of the linkage, the linkage further having a second link, the first and second links being pivotally connected to the row unit frame at a first pair of pivot axes, and a coupler connecting the first and second links at a second pair of pivot axes whereby the row unit frame and the coupler form third and fourth links of the four bar linkage, the furrow closing arrangement further having a ground contacting member mounting to a portion of the pivot arm extending beyond the second pair of pivot axes, and a furrow closing downforce actuator coupled between the row unit frame and the coupler and operable to vary force applied to soil by the ground contacting member as the seeding machine moves through a field.