Patent ID: 9332687
Filing Date: 2016-05-10
CPC Classification: A01B

Claim Text:
1. An apparatus comprising: a self-propelled soil working machine including a frame and an operator station; front and rear ground supporting wheels coupled with the frame, a least one of the front and rear ground supporting wheels configured to propel the machine; a linkage coupled with the frame and coupled with a soil working tool, the soil working tool being adjustably positioned by the linkage rearward of the front wheels and forward of the rear wheels, the linkage including a suspension element accommodating movement of the tool in response to external force; and a first adjustment mechanism coupled with the linkage and configured to adjust the linkage; a second adjustment mechanism configured to vary pitch of the tool; wherein adjustment of the first adjustment mechanism emulates the addition or subtraction of weight exerting downward force on the tool, and wherein the linkage further comprises a lifting element coupled with and extending between the tool and the frame, the lifting element configured to selectably raise and lower the tool and to limit movement of the tool relative to the suspension element in a first direction.