Versatile ultrahone sharpener
AssigneeEdgecraft Corporation
InventorsDaniel D. Friel, Sr., Daniel D. Friel, Jr., Robert P. Bigliano
Life of this patent
Estimating the term…
Abstract
A versatile ultrahoned sharpener includes a stop assembly which contains an inner hardened structure such as being made from metal or ceramic to serve as a positive limiting stop if the knife being sharpened cuts excessively into the plastic stop assembly of the sharpener. The sharpener also includes a manually actuated abrasive surfaced unit for cleaning or shaping the surface of at least one of the sharpening wheels in the sharpener. The sharpener further includes various bearing structures for effectively mounting the motor driven shaft which rotates the abrasive coated disks of the sharpener.
Claims12
A sharpener for blades with an elongated cutting edge with facets adjacent to each side of the cutting edge, comprising at least one rigid disk having an exposed abrasive coated surface and at least one flexible disk having an abrasive surface, each of said disks mounted on a shaft for rotation about a horizontal axis to move said surfaces across and away from the cutting edge when the blade is moved into contact with said surface, a blade guide surface juxtaposed each of said disks, said blade guide surfaces being at a predetermined vertical angle relative to a vertical line normal to said axis of rotation of said disks, said blade guide surfaces being in a plane which intersects said abrasive coated surface to function as an angular guide for the blade when the blade is placed against said blade guide surface to dispose the blade in contact with said abrasive coated surface, an edge stop-bar disposed forward of said abrasive surfaces and a second edge stop-bar disposed rearward of said abrasive surfaces, said edge stop-bars providing a location of contact with the blade edge as the blade moves into contact with each of said abrasive surfaces and cooperates with said angular guides to dispose the blade edge facet against said abrasive surface as the blade is moved across said rotating abrasive surface.
A knife sharpener with a motor drive means supported on the base of said sharpener, said drive means consisting of a motor with an integral drive shaft extending from the front end of said motor slidingly supported within two close-fitting bearings mounted one on each end of said motor, a bearing attached and rigidly positioned at a point along said drive shaft, said bearing supported and restrained from horizontal motion transverse to the axis of the shaft by a close fitting socket supported from the base, and two mounting bosses one under each end of motor integral to the motor that mate into and are fastened into two close fitting elongated sockets supported by the base to drive one or more sharpening wheels mounted along the length of said shaft.
Dependencies are inferred from the claim text.