Patent ID: 7155889

Claim:
A modularized replacement blade for a lawnmower comprising: a. a mounting hub, having a top, a bottom, a center and a perimeter, said mounting hub including i. a center portion situated on said top of said mounting hub, said center portion proximal to said center of said mounting hub; ii. a mounting bore, said mounting bore opening through said center portion and passing from said top of said mounting hub to said bottom of said mounting hub; iii. a first recessed seat, having a left side, a right side, a back side, and a vertical offset from said top of said mounting hub, said first recessed seat positioned proximal to said perimeter of said mounting hub; iv. a first corner wedge situated on said top of said mounting hub, said first corner wedge proximal to said perimeter of said mounting hub and positioned adjacent to said left side of said first recessed seat; v. a second corner wedge situated on top of said mounting hub, said second corner wedge proximal to said perimeter of said mounting hub and positioned adjacent to said right side of said first recessed seat; vi. a back mating edge formed between said center portion and said back side of said first recessed seat; vii. a first side mating edge formed between said first corner wedge and said left side of said first recessed seat; viii. a second side mating edge formed between said second corner wedge and said right side of said first recessed seat; b. a first cutting blade, having an attaching end and a cutting end, said cutting blade including i. a cutting edge positioned proximal to said cutting end of said cutting blade; ii. a first side edge positioned proximal to said attaching end of said cutting blade; iii. a second side edge positioned proximal to said attaching end of said cutting blade; iv. a back edge positioned proximal to said attaching end of said cutting blade; and c. wherein said first cutting blade is removably attached to said mounting hub so that said first side edge of said cutting blade mates with said first side mating edge of said mounting hub, said second side edge of said cutting blade mates with said second side mating edge of said mounting hub, and said back edge of said cutting blade mates with said back mating edge of said mounting hub.