Knife section

Details Knife section Knife section

1979-03-20

1980-09-23

Hafer, Robert A.

Harvesters

Cutting

Cutter members

56303, A01D 5502

Patent

active

042235146

ABSTRACT:
An improved knife section for reciprocating mower is disclosed wherein the improved knife section is constructed from less material than a standard knife section. The thickness of the improved knife section is made substantially equal to the thickness of the material of a standard knife section by forming convolutions in the body. A reinforcing ridge parallel to the cutting edge further improves the rigidity and strength of the improved knife section. The reinforcing ridge extends rearwardly beyond the cutting edge to encircle the rivet holes to allow for the inclusion of countersunk areas permitting the rivet heads to fit within the plane of the knife section, thereby producing a substantially uniform top surface. An extension of the countersunk area below the bottom surface of the knife section can interfit an embossed depression formed around the rivet hole in the support bar, resulting in an interlock between the knife section and support bar to reduce shearing stresses within the rivet.

REFERENCES:
patent: 13149 (1855-06-01), Manny
patent: 16442 (1857-01-01), Hubbard
patent: 33680 (1861-11-01), McCormick
patent: 103699 (1870-05-01), Allstatter
patent: 552665 (1896-01-01), Miller
patent: 601447 (1898-03-01), Miller
patent: 795550 (1905-07-01), Schum
patent: 2217741 (1940-10-01), Gillette
patent: 2931159 (1960-04-01), Hill

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