Patent ID: 7322133

Claim:
A multi-shank ripper excavation tool for use mounted to an arm of an excavation machine, said multi-shank excavation ripper tool comprising: a body mounted for rotation from the arm, and at least one set of multiple shanks mounted to the body, each shank of said at least one set of multiple shanks being disposed generally perpendicular to an axis of rotation of said multi-shank ripper excavation tool relative to the arm, and each said shank of said at least one set of multiple shanks comprising a ripper tooth disposed at a forward end thereof for ripping engagement with a substrate, said set of multiple shanks comprising at least: a first shank comprising a first ripper tooth disposed at a forward end thereof for ripping engagement with the substrate, a second shank comprising a second ripper tooth disposed at a forward end thereof for ripping engagement with the substrate, said second shank being laterally spaced from said first shank along the axis of rotation of said multi-shank ripper excavation tool relative to the arm, and said second ripper tooth being angularly spaced from said first ripper tooth in a direction of substrate ripping motion, and each said ripper tooth having a ripper tooth tip and being disposed at a predetermined angle to a tangent to an arc of rotation extending generally through its said ripper tooth tip with an arc center at an axis of rotation of said ripper tooth tip and said first ripper tooth and said second ripper tooth being non-parallel.