Safety blade for rotary grass trimmers

Details Safety blade for rotary grass trimmers Safety blade for rotary grass trimmers

1988-10-28

1990-01-16

Bui, Thuy M.

Harvesters

Cutting

Cutter members

A01D 5518

Patent

active

048934577

ABSTRACT:
A safety blade for rotary grass trimmers for cutting grass and weeds while avoiding the hazards of blade thrusting and of any loose debris being thrown by the spinning blade. The blade has a plurality of cutting vanes each with a rounded outside radial edge of varying radius which serves as a bumper as the blade spins. Each vane has upwardly beveled cutting edges which along with the rounded outside radial edge serves to nudge away, rather than lift and throw, any loose debris encountered by the spinning blade.

REFERENCES:
patent: 2833101 (1958-05-01), Batton
patent: 2920436 (1960-01-01), Benson
patent: 3078573 (1963-02-01), Kern
patent: 3103094 (1963-09-01), Cook
patent: 3425199 (1969-02-01), Freedlander et al.
patent: 3614861 (1971-10-01), Wickham et al.
patent: 3681903 (1972-08-01), Phillips
patent: 4250622 (1981-02-01), Houle
patent: 4290258 (1981-09-01), Gobler
patent: 4527382 (1985-07-01), Aono
patent: 4706446 (1982-11-01), Doi et al.
8-Tooth Grass/Weed Blade; McCulloch Corporation; before 10/88.

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