Knife-blade sharpening apparatus

Abrading – Rigid tool – Stationary

Patent

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Details

451558, 76 82, 76 88, B24D 1508

Patent

active

057001898

ABSTRACT:
A blade-sharpening apparatus for knives and other cutting tools which uses a ceramic sharpening element. The sharpening element is a recycled aluminum oxide sodium vapor streetlight bulb. The vapor and heat expansion and contraction of the bulb during use as a light causes wear on the bulb and results in the ceramic element becoming more porous, thereby providing an abrasive surface suitable for blade sharpening. A first embodiment of the apparatus comprises a housing with a support substantially along a length of the sharpening element and a cover for enclosing the sharpening element when not in use. In the first embodiment, the sharpening element is supported on both ends. In a second embodiment, the sharpening element is supported on one end by a handle and a sleeve is provided to enclose the sharpening element when not in use. The sleeve may be attached to a portion of the handle opposite the sharpening element when in an operating position.

REFERENCES:
patent: D288169 (1987-02-01), Cohen
patent: D316662 (1991-05-01), Cherniak
patent: D327402 (1992-06-01), Button et al.
patent: D329797 (1992-09-01), Baker
patent: D333081 (1993-02-01), Glesser
patent: D337253 (1993-07-01), Glesser
patent: 3719461 (1973-03-01), Topping
patent: 4094106 (1978-06-01), Harris
patent: 4197677 (1980-04-01), Graves
patent: 4611437 (1986-09-01), Cohen
patent: 4646477 (1987-03-01), Robertson
patent: 5458534 (1995-10-01), Canpione et al.
General Electric General Catalog 7730, dated Mar., 1981, entitled "Lucalox.RTM. Ceramic Tubing".

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