US 4,229,910 A · Knife sharpening apparatus

Abstract

A knife sharpening apparatus adjustable to maintain a knife at a preselected angle during sharpening. The apparatus includes a platform adapted for supporting a sharpening stone thereon, and a support assembly mounted for shifting along a path substantially normal to the plane of the platform. A bar used in guiding the top edge of a knife blade is mounted on the assembly for shifting relative thereto along such path. To adjust the apparatus, the bar is placed at a "zero" position on the support assembly, and the latter is shifted to place the bar against the top of the stone. The bar is then shifted away from its "zero" position a preselected distance to produce a desired spacing between the bar and the stone, wherein, with a knife blade placed with its working edge against the stone, and its opposite edge against the bar, the blade is held at a desired preselected angle.

Claims6

Dependent claims

Knife-sharpening apparatus comprising, in operative condition,

a platform supporting a sharpening stone thereon,
a bar mounted adjacent said platform,
means defining a scale of markings representing spacings between said bar and said platform measured relative to a preselected spacing,
shifting means for producing such preselected spacing between said scale-defining means and said platform, and
bar shifting means operatively interconnecting said bar and said platform, selectively operable, independent of said shifting means, to produce a desired spacing between said bar and said platform corresponding to a preselected one of said scale markings, wherein a knife blade placed with its working edge against said stone and its opposite edge against said bar is held at a preselected angle relative to said stone.

2 more elements

Dependencies are inferred from the claim text.

Knife sharpening apparatus

Life of this patent

Knife sharpening apparatus

Life of this patent

Abstract

Claims6