Trash cleaning structure for a furrow opening device
First Claim
1. In an implement having a transversely extending toolbar member, cleaning structure for clearing trash from a narrow band of ground forwardly of a furrow opening device that includes a drawbar member having a leading end connected at a pivot area to the toolbar member for rocking vertically relative to the toolbar member, and a trailing end, the cleaning structure comprising a linkage having a forward end pivotally connected at the pivot area to the leading end of the drawbar member for rocking relative to the drawbar member, and an aft vertically movable end located forwardly of the furrow opening device;
- clearing disk structure rotatably mounted at the aft end of the linkage for movement vertically therewith adjacent the furrow opening device; and
wherein the linkage includes link structure maintaining a generally constant relationship between the disk structure and the furrow opening device with vertical movement of the disk structure as the furrow opening device and the clearing disk structure encounter variations in ground and trash conditions.
2 Assignments
0 Petitions
Accused Products
Abstract
A pair of angled disks supported by a four bar linkage from the upper end of the opener drawbar assembly clears trash from a narrow area in front of the opener. The four bar linkage has a virtual center located on or close to the center of the opener disk for good cleaning wheel tracking and for permitting the clearing disks to be spaced closely to the opener disk without interference between the disks. The clearing disks can rock vertically to follow ground contour and prevent excessive digging and soil movement. Shallow teeth on the disks also reduce soil penetration and soil disturbance.
89 Citations
20 Claims
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1. In an implement having a transversely extending toolbar member, cleaning structure for clearing trash from a narrow band of ground forwardly of a furrow opening device that includes a drawbar member having a leading end connected at a pivot area to the toolbar member for rocking vertically relative to the toolbar member, and a trailing end, the cleaning structure comprising a linkage having a forward end pivotally connected at the pivot area to the leading end of the drawbar member for rocking relative to the drawbar member, and an aft vertically movable end located forwardly of the furrow opening device;
- clearing disk structure rotatably mounted at the aft end of the linkage for movement vertically therewith adjacent the furrow opening device; and
wherein the linkage includes link structure maintaining a generally constant relationship between the disk structure and the furrow opening device with vertical movement of the disk structure as the furrow opening device and the clearing disk structure encounter variations in ground and trash conditions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- clearing disk structure rotatably mounted at the aft end of the linkage for movement vertically therewith adjacent the furrow opening device; and
- 10. Cleaning structure for clearing trash from a narrow band of ground forwardly of a fore-and-aft extending opener assembly including a fore-and-aft extending arm having a forward mounting end and an aft end supporting a furrow forming device, the furrow forming device having a forwardmost extremity, wherein the cleaning structure comprises a four bar linkage having a forward upright member connected to the forward mounting end of the arm, a pair of links pivotally connected to the forward upright member and extending rearwardly from the forward upright member, an aft upright member pivotally connected to the links for vertical movement relative to the forward upright member, and a pair of angled disks connected to the aft upright member and movable vertically relative therewith, the disks rotatable about offset axes to define a forward pinch point area and a diverging area behind the forward pinch point area and adjacent the furrow forming device, and wherein the angled disks include peripheries, at least one of the peripheries overlapping the forwardmost extremity of the furrow forming device.
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15. Cleaning structure for clearing trash from a narrow band of ground forwardly of a fore-and-aft extending opener assembly including an opener disk supported from a vertically rockable fore-and-aft arm assembly for rotation about an opener axis, the arm assembly including an arm having a forward pivot area, the disk including a leading edge for penetrating the ground at a leading soil entry location, the cleaning structure comprising:
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a clearing disk assembly including a clearing disk, the clearing disk having a periphery with a rearmost extremity; linkage structure including a bracket depending from the forward pivot area of the arm connecting the clearing disk to the arm for rocking vertically relative to the arm assembly with the rearmost extremity closely adjacent the soil entry location, the linkage structure maintaining the clearing disk periphery in a generally constant relationship relative to the leading edge as the arm assembly rocks vertically over the ground. - View Dependent Claims (16, 17, 18)
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19. Cleaning structure for clearing trash from a narrow band of ground forwardly of a fore-and-aft extending opener assembly including an opener disk supported from a vertically rockable fore-and-aft arm assembly for rotation about an opener axis, the disk including a leading edge for penetrating the ground at a leading soil entry location, the cleaning structure comprising:
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a clearing disk assembly including two disks having axes of rotation angled relative to each other to define a forward pinch area and opening rearwardly from the pinch area to a rearward open area; linkage structure connecting the angled clearing disks to the arm assembly for rocking vertically relative to the arm assembly with the rearward open area closely adjacent the soil entry location, the linkage structure maintaining the rearward open area in a generally constant relationship relative to the leading edge as the arm assembly rocks vertically over the ground; and wherein the linkage structure comprises a bracket depending from a forward end of the arm assembly and rockable therewith, and the linkage structure comprises upper and lower fore-and-aft extending links pivotally connected at their forward ends to vertically offset locations on the bracket and at their aft ends to the clearing disk assembly. - View Dependent Claims (20)
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Specification