High speed precision sharpening apparatus

Details High speed precision sharpening apparatus High speed precision sharpening apparatus

1995-04-28

1997-03-18

Kisliuk, Bruce M.

Abrading

Machine

Rotary tool

451259, 451267, 451282, 451293, B24B 900

Patent

active

056117264

ABSTRACT:
A high speed knife sharpening apparatus where the surface of a first rotating abrasive element is that of a truncated cone and forms a first facet with microgrooves and a microburr. A second stage is a novel composite cone shaped honing wheel made up of a micro abrasive imbedded in an epoxy matrix. The honing wheel refines the edge developed in the first stage, into an erect triangular shape with a radius of curvature, at the apex (edge), of typically several microns or less depending on the hardness of the knife steel. A unique blade holding system constrains the blade to a precisely defined angle relative to each of the grinding (first) and honing (second) stages. Proportionately larger grinding forces are developed for thicker knife blades, thus sharpening times are approximately the same over the common range of knives from small paring knives (6"), large chef's knives (10") up to kitchen cleavers.

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patent: 5018310 (1991-05-01), Fierus et al.
patent: 5245791 (1993-09-01), Bigliano et al.

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