Harvesters – Cutting – Cutter members
Patent
1982-07-26
1985-12-24
Hirsch, Paul J.
Harvesters
Cutting
Cutter members
56 134, A01D 5518
Patent
active
045597693
ABSTRACT:
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 form line at a uniform radius between 1.00 inches and 1.40 inches measured in a plane perpendicular to the form line.
REFERENCES:
patent: 1656105 (1928-01-01), Durkee
patent: 2969634 (1961-01-01), Lannert
patent: 3762138 (1973-10-01), Michael
patent: 4062171 (1977-12-01), Rose
patent: 4129977 (1978-12-01), Comer
patent: 4149358 (1979-04-01), Comer
patent: 4306407 (1981-12-01), Dambroth
Hirsch Paul J.
Outboard Marine Corporation
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