Patent ID: 6427341
Filing Date: 2002-08-06
Classification: A01D,Y10T

Abstract:
A cutting blade for use on a hub mounted on a hand held cutting device for rotation about an axis of rotation, the cutting blade comprising an elongate planar body of a plastic material having first and second opposite side portions extending between proximal and distal extremities, the elongate body having a centerline extending between the proximal and distal extremities midway between the side portions, means carried by the proximal extremity of the elongate body adapted to secure the body to the hub, the elongate body having spaced-apart upper and lower surfaces extending between the side portions and a thickness measured between the upper and lower surfaces, at least one of the side portions in cross section having a decreasing thickness in a direction away from the centerline to provide at least one inclined surface terminating in a cutting edge extending along at least a portion of the side portion, at least one of the upper and lower surfaces decreasing in thickness behind the side portion and toward the centerline to form an indentation extending along the at least one of the upper and lower surfaces between the side portion and the centerline, the indentation having a depth that is greater than 30% of the thickness of the elongate body so as the plastic material of the body wears past the side portion the indentation forms a new cutting edge to extend the cutting life of the cutting blade.