Patent ID: 7669666
Filing Date: 2010-03-02
Classification: A01B

Abstract:
1. A soil aeration apparatus, comprising: a frame to move over a ground surface in a direction of travel; a tine holder member; a gear system that imparts compound motions to the tine holder member; at least one curved tine mounted to the tine holder member, the curved tine having a concave edge, a complementary convex edge, and a tip portion, wherein the convex edge cuts through soil and faces generally away from the direction of travel while the curved tine is in the ground surface; and a timing member coupled to the gear system, the timing member being adjustable between a first position to a second position, wherein when the timing member is in the first position, the tine penetrates a ground surface in a first penetration orientation, wherein when the timing member is in the second position, the tine penetrates the ground surface in a second penetration orientation, and wherein the concave edge of the curved tine faces toward the ground surface when the tine exits the ground surface.