Patent ID: 8616298

Claim:
A mounting structure to mount a depth control member to a row unit of an implement, the row unit having a frame, the mounting structure comprising: a pivot arm having one end adapted to be coupled to a depth control member and a bushing block at the other end for pivotally mounting the pivot arm to the frame, the bushing block having a bore therethrough, a portion of the bore being threaded and at least one portion of the bore being smooth; a bushing having a cylindrical body with a head at one end and a through bore, the cylindrical body further having an outer cylindrical surface with threads on a portion thereof for engagement with the threads in the bore of the bushing block and at least one portion of the outer cylindrical surface being smooth for engagement with the smooth portion of the bore in the bushing block with the bushing block rotatable on the bushing and with a portion of the bushing extending beyond the bushing block; and a mounting bolt having a head at one end, the bolt extending through the bore in the bushing with the bolt head adjacent to the head of the bushing, the bolt extending beyond the a distal end of the bushing opposite the bushing head and being sized to threadably fit into a threaded hole in the frame to mount the bushing tight against the frame and prevent rotation of the bushing about the mounting bolt while the bushing block and pivot arm are free to rotate on the bushing.