Lawn mower blade

Details Lawn mower blade Lawn mower blade

A - Human Necessities

01

D

56/58

A01D 34/73 (2006.01)

Patent

CA 1203692

ABSTRACT OF DISCLOSURE . Disclosed herein is a cutter blade for a rotary lawn mower, which cutter blade is generally of elongated rectangular outline and includes a leading edge, a trailing edge, a longitudinal axis extending lengthwise between the leading and trailing edges, a generally planar outer end portion including a cutting edge forming a part of the leading edge and an outer tip, and a sail portion extending from outer end portion along a form line extending between the outer tip and the trailing edge at a form angle within the range of 25 degrees to 35 degrees to the longitudinal axis. The sail portion also has an upper edge which is spaced above a horizontal plane containing the cutting edge at a height of between 0.65 inches and 0.75 inches and which extends continuously concavely arcuately outwardly and upwardly from the from line at a uniform radius between 1.00 inches and 1.40 inches measured in a plane perpendicular to the form line.

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