Hitch for rotary cultivator

Claim 1

In combination with: a vehicle including a ground supported framework normally driven in a forward direction; a rotary cultivating implement of the type including: a transverse rotary blade assembly; a frame rotatably supporting the rotary blade assembly for rotational motion about a first transverse axis; power means operatively connected to the Rotary blade assembly for imparting continual rotational movement to the rotary blade assembly about said first transverse axis in such a direction as to move the lowermost portion of the rotary blade assembly in a rearward direction relative to the forward direction of the framework; and a hitch assembly for mounting the rotary cultivating implement to the vehicle including transverse pivotal support means operatively connecting the implement frame to the vehicle framework about a second transverse axis above and parallel to said first rotational axis; an improvement in the hitch assembly, comprising: angular positioning means in the form of a longitudinally extensible arm pivotally connected at one end to the vehicle framework about a third transverse axis parallel to and spaced from said first transverse axis and pivotally connected at its remaining end to the implement frame about a fourth transverse axis parallel to and spaced above said first transverse axis; said arm including biasing means normally maintaining it in a retracted condition and permitting yieldable extension thereof so as to extend the distance separating said third and fourth axes in response to forward pivotal movement of the implement frame about said second transverse axis caused by rotation of the rotary blade.