Patent ID: 7267181

Claim:
A cultivator for aerating a ground surface including: a support frame moveable relative to the ground surface; a follower pivotally connected to the support frame by a first pair of spaced link arms having two pairs of equidistantly spaced pivot points for linear movement of the follower along a first direction toward and away from the support frame; a tool support member pivotally connected to the follower by a second pair of spaced link arms having two pairs of equidistantly spaced pivot points for linear movement of a cultivating tool along a second direction substantially perpendicular to the first direction; and a driver to selectively effect cyclic movement of the tool support member along said second direction and effect movement of the follower along said first direction; a bias element to provide resilient damping of the movement of said follower along said first direction away from said support frame, wherein said resilient damping is provided at an extremity of movement of the follower outward from the support frame along said first direction to urge the follower in the direction of inward movement toward said support frame; and a dampening element to provide resilient damping of the movement of said follower along said first direction toward said support frame, said resilient damping provided at an extremity of movement of the follower inward toward the support frame in said first direction to progressively arrest movement of the follower in the direction of inward movement toward said support frame.