Auger tooth with side edge blade

Claim 1

AN AUGER HAVING A HEAD EXTENDING OUTWARDLY TO OPPOSITE SIDES OF THE AXIS OF ROTATION OF SAID AUGER AND FORMED WITH A PLURALITY OF TOOTH HOLDERS ON EACH SIDE OF SAID AXIS, A TOOTH IN EACH SAID TOOTH HOLDER, EACH SAID TOOTH BEING REMOVABLE, THE OUTERMOST TOOTH ON AT LEAST ONE SIDE OF SAID AUGER HAVING A PROXIMAL PORTION FORMED WITH MEANS FOR REMOVABLE ATTACHMENT TO A COOPERATING TOOTHHOLDER AND A DISTAL PORTION, SAID DISTAL PORTION HAVING SUBSTANTIALLY PARALLEL SIDE EDGES AND FORWARDLY CONVERGING TOP AND BOTTOM FACES TERMINATING IN A BLUNT TRANSVERSE DISTAL END, SAID DISTAL PORTION HAVING ALONG ONE SIDE EDGE A DEPENDING SIDE EDGE BLADE TRANSVERSE TO THE GENERAL DIRECTION OF SAID TOOTH, SAID SIDE EDGE BLADE HAVING A BOTTOM FRONT CORNER WHICH AS VIEWED IN SIDE ELEVATION IS DISPOSED FORWARDLY OF A REFERENCE PLANE ALONG SAID DISTAL END PERPENDICULAR TO SAID GENERAL DIRECTION OF SAID TOOTH, SAID BLADE LYING ON THE OUTERMOST EDGE OF SAID AUGER.