Low noise producing lawn mower blade

Details Low noise producing lawn mower blade Low noise producing lawn mower blade

1979-08-21

1981-03-10

Eskovitz, Jay N.

Harvesters

Cutting

Cutter members

A01D 5518

Patent

active

042546079

ABSTRACT:
A lawn mower blade includes a leading flat portion, at each of its opposite ends, sharpened to define a cutting edge and a trailing vane is joined to and is angled upwardly in trailing relationship to each flat portion. In one embodiment, the vanes are each in the form of a lift wing and perforations or holes are located in the leading flat portion ahead of the lift wing and provide air pressure relief passages. In another embodiment the vanes include lift wings and bagging paddles joined to the lift wings and including second leading flat portions to which trailing fins are joined. The second leading flat portion is either recessed to form a space between outer end portions of the fin and flat portion or is perforated to provide air pressure relief passages.

REFERENCES:
patent: 2908128 (1959-10-01), Mauro
patent: 3220170 (1965-11-01), Smith et al.
patent: 3445992 (1969-05-01), Hanson et al.
patent: 3636685 (1972-01-01), Speckman
patent: 4149358 (1979-04-01), Comer

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