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US 9,789,551 B2Granted
Shear knife
AssigneeAsko, Inc.
InventorsJoel D. Kneisley, Menno Johan van der Woude, Albert R. Zelt, III
Life of this patent
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Abstract
A metal shearing tool demonstrating improved fatigue life having a body; an edge of the body having a first surface and a second surface; a cutting surface disposed between the first surface and the second surface. The edge has at least one of a curved profile surface, a radiused cutting surface, and a substantial absence of finish marks substantially parallel with the cutting surface on all surfaces of the edge.
Claims9
A metal shearing tool comprising:
- a body;
- an edge of the body having a first surface and a second surface;
- a cutting surface disposed between the first surface and the second surface;
- wherein the edge has at least one of a curved profile, a radius, and a substantial absence of finish marks substantially parallel with the cutting surface;
- and
- wherein the metal shearing tool demonstrates improved fatigue life of at least 130% compared to the same metal shearing tool not having at least one of a curved profile, a radius, and a substantial absence of finish marks substantially parallel with the cutting surface.
3 more elements
Dependencies are inferred from the claim text.