Knife edged stalk rolls
AssigneeDeere & Company
InventorsTimothy F. Christensen, Bonnie D. Adams, Jerry A. Sandau
Life of this patent
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Abstract
A stalk roll comprises a cylindrical shell having six integral flutes. Each flute is provided with a knife edge having a leading surface and a trailing surface. The leading surface has a forward slope of approximately 10.degree. from the plane formed by the central longitudinal axis of the cylindrical shell and the vertex of the respective knife edge. The trailing surface has a reverse slope of approximately 30.degree. from the plane formed by the central longitudinal axis of the cylindrical shell and the vertex of the respective knife edge. The cylindrical shell comprises two semi-cylindrical pieces that are clamped about a drive shaft of a corn harvesting head by associated bolts.
Claims18
A stalk roll for a corn harvesting header, the stalk roll comprising:
- a cylindrical shell having a central longitudinal axis;
- longitudinal integral flutes extending radially from the shell, the flutes are substantially parallel to the central longitudinal axis, each flute is provided with a knife edge, each knife edge has a leading surface and a trailing surface, the leading surface has a forward slope, the trailing surface has a reverse slope, the leading surface is steeper than the trailing surface and forms an acute angle with the trailing surface;
- and
- means for mounting the shell to a drive shaft of a corn harvesting header.
A pair of adjoining stalk rolls for a corn header, the adjoining stalk rolls defining a harvesting gap, each stalk roll comprising:
- a cylindrical shell having a central longitudinal axis;
- longitudinal integral flutes extending radially from the shell, the flutes are substantially parallel to the central longitudinal axis, each flute is provided with a knife edge, each knife edge has a leading surface and a trailing surface, the leading surface has a forward slope, the trailing surface has a reverse slope, the leading surface is steeper than the trailing surface and forms an acute angle with the trailing surface;
- whereby the flutes of the pair of adjoining stalk rolls are offset to one another.
Dependencies are inferred from the claim text.