<p>An agricultural device includes a number of row units that each includes a seed furrow opener that creates a furrow in the soil for seed placement. Each row unit is mounted to a toolbar of the device by means of a four-bar linkage which allows each row unit to move vertically to adjust to the contour of the soil independently of the other row units on the same toolbar. The four-bar linkages include one or more springs which work to transfer weight from the toolbar to the row unit. An actuator varies the tension in the spring thereby adjusting the down or up force applied to the row unit.</p>
申请公布号
EP2701482(A1)
申请公布日期
2014.03.05
申请号
EP20120776742
申请日期
2012.04.27
申请人
KINZE MANUFACTURING, INC.
发明人
ACHEN, COURTNEY, N.;BACHMAN, MARVIN, L.;STEVENSON, VAUGHAN, G.