Lawnmower blades

Harvesters – Cutting – Cutter members

Patent

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Details

A01D 5518

Patent

active

042902584

ABSTRACT:
An improved lawnmower blade for cutting in a substantially horizontal position, of the type including a strip of metal having a substantially flat central region and end portions provided with cutting edges on opposite sides of the blade, the cutting edges being at a level lower than the central region in the position of operation and extending substantially parallel to the surface thereof and being joined by transitional zones to the surface of the central region; these transitional zones extend at the ends of the blade, from the cutting edges to the trailing edges of the blade respectively and which are progressively shorter with increasing distance from the ends. The improvement provides a hump formed in the blade, associated with each transitional zone, for aiding in the ejection of grass from a lawnmower. Each hump merges with its associated transitional zone and is directed towards its associated trailing edge. Advantageously, each hump has an open mouth directed towards its associated trailing edge. The humps are preferably integral with the blade itself.

REFERENCES:
patent: 2969634 (1961-01-01), Lannert
patent: 3869848 (1975-03-01), Larson
patent: 3910017 (1975-10-01), Thorud et al.
patent: 4189903 (1980-02-01), Jackson et al.

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