Depth adjustment mechanism for farm implements

Abstract

An adjustment mechanism for use with farm implements or other equipment utilizes a series of alternating teeth and notches arranged in an arcuate pattern about an axis of adjusting movement on a movable member and a pair of arcuately spaced latching bars on a stationary member of the mechanism. The bars are individually shiftable into and out of engagement with the teeth and notches and are spaced apart such a distance that when either of the bars is in registration with a notch, the other bar is in registration with a tooth. Springs yieldably bias the bars toward the teeth and notches so that the bar aligned with a notch will snap down into the notch while the other bar resides in a standby position abutting the outer end of its tooth. When the seated bar is manually withdrawn from its notch, the movable member becomes unlatched and is free to be indexed one increment in either direction about the adjustment axis, whereupon the bar in the standby position snaps down into a notch brought under that bar, reestablishing a latched condition while the withdrawn bar becomes retained in its standby position by the outer end of its tooth. A double-acting lever having two fulcrum connections with the bars at their outer ends is successively raised and lowered about alternate ones of the fulcrum connections to manipulate the latching bars.

Dependencies are inferred from the claim text.