Blade structure for mowers and edgers

Claim 1

A disc shaped blade of circular configuration for mounting on the driven shaft of powered lawn equipment such as lawnmowers and edgers, said disc comprising a central planar area having an uninterrupted surface extending outwardly from the blades center for a major portion of the blades radius, consecutive blade projections extending horizontally outward from said central area with said projections constituting the blades peripheral area, each of the projections having a radially disposed forward cutting edge, a fin portion on each of said blade projections extending rearwardly and upwardly in an inclined manner from the horizontal portion of the blade projection, each of said fin portions lying in an inclined plane diagonal to said projection and rearwardly offset from the cutting edge thereof whereby vegetation cut by the blade is outwardly discharged along a vector upwardly inclined to the blade projection, each of said fin portions terminating outwardly in an undercut beveled surface contiguous with said radially disposed cutting edge and providing a secondary cutting edge supplementing the cutting action of said radially disposed cutting edge while simultaneously preventing entanglement of vegetation about the blade projection.