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.
Claims11
A stop-bar for use in a knife sharpener to limit by direct contact the travel of an elongated knife blade edge with facets formed at a sharpening angle to a blade axis adjacent to each side of a cutting edge, said bar including a contact member having a strike face set at a predetermined angle to a vertical axis to provide a positive stop for the blade, said angle being of a magnitude to insure contact with a face of the edge facet or with a junction point between the facet and the blade, thus protecting the edge itself from damage as advancement of the blade is stopped by contact with said contact member, said contact member being mounted to a support member to form a two layer laminate, and said contact member being made of a hardened material to limit mechanical wear and damage to said support member by the blade as the blade contacts said contact member.
In a knife sharpener with at least one axially driven abrasive surfaced sharpening wheel, the improvement being in a manually actuated abrasive surfaced unit to clean or shape the surface of at least one said sharpening wheel when said abrasive surfaced unit is brought into contact with the abrasive surface of said sharpening wheel.
In a knife sharpener having at least one sharpening stage with an abrasive surface member mounted in said sharpening stage, said sharpening stage including a knife guide having a guide surface disposed at an angle to said abrasive surface of said member for orienting an elongated knife blade edge with facets formed at a sharpening angle to a blade axis adjacent to each side of a cutting edge, the improvement being in a stop-bar mounted in said sharpening stage to limit by direct contact a travel of the knife blade, said stop-bar having a strike face at a location which crosses a plane of said guide surface and set at a predetermined angle to a vertical axis to provide a positive stop for the blade, said angle being of a magnitude and said strike face being located with respect to said abrasive surface member and to said guide surface so as to insure contact of the blade with said stop-bar on the same side of the blade that is being sharpened by said abrasive surface member whereby while one portion of the facet is being sharpened another portion of the same facet is in contact with said stop-bar.
Dependencies are inferred from the claim text.