US 12,471,520 B2
Row unit, agricultural implement comprising row unit and method of operating row unit
Gert Gilstring, Vadstena (SE); Crister Stark, Väderstad (SE); Rune Rommedahl, Ljungsbro (SE); and Per-Arne Hagby, Ödeshög (SE)
Assigned to Väderstad Holding AB, Väderstad (SE)
Appl. No. 17/771,099
Filed by Väderstad Holding AB, Väderstad (SE)
PCT Filed Oct. 21, 2020, PCT No. PCT/SE2020/051019
§ 371(c)(1), (2) Date Apr. 22, 2022,
PCT Pub. No. WO2021/080494, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 1951214-4 (SE), filed on Oct. 24, 2019.
Prior Publication US 2022/0377968 A1, Dec. 1, 2022
Int. Cl. A01C 7/20 (2006.01); A01B 63/00 (2006.01)
CPC A01C 7/203 (2013.01) [A01B 63/008 (2013.01); A01C 7/205 (2013.01)] 19 Claims
OG exemplary drawing
 
1. Agricultural implement, comprising an implement frame, which carries a number of row units for feeding granular material to a ground,
wherein each row unit, comprises:
a seed furrow-opener, which has a seed furrow-opening arm carrying a seed disc,
wherein the seed furrow-opening arm has a proximal portion, in which the seed furrow-opening arm is pivotable about a first geometrical axis and a distal portion, to which the seed disc is rotatably attached,
a depth regulator, which has a depth-regulating arm carrying a gauge wheel,
wherein the depth-regulating arm is pivotable about a second geometrical axis which is concentric with a centre of rotation for the seed disc,
wherein the row unit comprises a first adjusting device for setting the height of the gauge wheel in relation to the seed disc,
wherein the first adjusting device comprises:
a lever, which is fixedly connected to the depth-regulating arm,
a depth-regulating driver arm pivotable at the first geometrical axis, and
a control link, which connects distal portions of the lever and the depth-regulating driver arm, so that the pivotal position of the lever is controllable by pivoting the depth-regulating driver arm,
wherein the agricultural implement further comprises:
a first actuator, for setting a ground pressure effected by the seed discs, and
a second actuator, for setting the height position of the gauge wheels relative to the seed discs, and
a depth-regulating control arm, which is connected to the respective depth-regulating driver arm of at least two row units, wherein the second actuator is actively arranged between the implement frame and a distal portion of the depth-regulating control arm,
wherein the depth-regulating control arm and the depth-regulating driver arm are pivotable about a common geometrical axis.