US 12,185,660 B2
Adjustable depth control system for row unit planters
Jeffrey Alan Sivinski, Cherokee, IA (US)
Assigned to Harvest International, Inc., Storm Lake, IA (US)
Filed by Harvest International, Inc., Storm Lake, IA (US)
Filed on Mar. 15, 2021, as Appl. No. 17/249,822.
Claims priority of provisional application 62/990,710, filed on Mar. 17, 2020.
Prior Publication US 2021/0289688 A1, Sep. 23, 2021
Int. Cl. A01C 7/20 (2006.01); A01C 7/08 (2006.01)
CPC A01C 7/20 (2013.01) [A01C 7/08 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An adjustable depth controller for an agricultural row unit having gauge wheels mounted on gauge wheel arms pivotally mounted on a frame having a plurality of adjustment notches, the depth controller comprising:
a control arm pivotally mounted on the frame;
a control handle extending from an upper end of the control arm for selective receipt in the adjustment notches;
a block pivotally mounted to a lower end of the control arm;
a rocker arm mounted to the block and having opposite lateral sides engaging the gauge wheel arms;
adjustment bolts threadably extending through the control arm to engage the block; and
whereby screwing the adjustment bolts in and out pivots the block to move the rocker arm so as to adjust the gauge wheel arms to provide a desired planting depth.