Earth working – Lawn aerator or perforator – or plug remover
Reexamination Certificate
2005-09-27
2005-09-27
Pezzuto, Robert E (Department: 3671)
Earth working
Lawn aerator or perforator, or plug remover
Reexamination Certificate
active
06948568
ABSTRACT:
A cultivator for aerating a ground surface. The cultivator has a support frame moveable relative to the ground surface and a follower first pivotally connected to the support frame by a first pair of spaced link arms. The link arms have two pairs of equidistantly spaced pivot points for linear movement of the follower in a first direction away from the support frame. A tool support member is pivotally connected to the follower by a second pair of spaced link arms. The second link arms have two pairs of equidistantly spaced pivot points for linear movement of a cultivating tool in a second direction substantially perpendicular to the first direction. A driver effects cyclic movement of the tool support member in the second direction and movement of the follower in said first direction at a substantially constant rate during at least a selected portion of the cyclic movement corresponding to ground engagement of the cultivating tool.
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Sketch of Aerating Machine Linkage Commercially Available More Than One Year Prior to Filing The Application (1 page), no date.
Deere & Company
Pezzuto Robert E
The Law Office of Randall T. Erickson, P.C.
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