Patent ID: 6655119
Filing Date: 2003-12-02
Classification: A01D,Y10S

Abstract:
A cutter blade for a lawn mower with a motor, comprising:a mounting section mountable to an output shaft of said motor and extending radially outward in opposite directions from the mounted portion; a cutting edge formed on a rotationally leading edge on each side of said mounting section; and an airlift curved from said cutting edge to a rotationally trailing edge and having a plurality of vent holes; wherein, said trailing edge is shaped in a waveform comprising a plurality of protrusions and a plurality of depressions formed between said protrusions, the one of said plurality of protrusions closest to an outer end of said cutter blade is greatest in width; and said plurality of vent holes are elongate holes arranged in lines extending from the vicinity of said protrusions of said trailing edge toward said leading edge.