Lawn mower cutting assembly

Details Lawn mower cutting assembly Lawn mower cutting assembly

A - Human Necessities

01

D

56/58

A01D 34/73 (2006.01) A01D 34/416 (2006.01)

Patent

CA 1286116

ABSTRACT OF THE DISCLOSURE A grass cutting assembly for a rotary lawn mower having flexible resilient blades replaceably mounted on a rotor disc. Each elongated blade has an elongated inner end portion and a flat outer cutting portion which is twisted at 90° to a flat mid portion. The lower surface of the rotary disc has a radial blade insertion groove which leads to a blade receiving opening which extends radially through each thicker blade holder portion which projects downwardly along the outer periphery of the disc. Each blade receiving opening has a vertically oriented narrow cylindrical portion adjacent the inner face whereby the blade rotates 90° as it is inserted outwardly to a cutting position wherein the enlarged inner end abuts against the inner face of the blade holder portion, the mid portion is held in a vertical orientation and the outer cutting portion which projects beyond the outer periphery of the disc is held in a horizontal orientation. The flat outer cutting portion is sufficiently rigid to efficiently cut the grass, while the vertically oriented mid portion flexes sufficiently when an obstacle is encountered to prevent serious injury, as well as to prevent block shearing.

572064

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