Patent ID: 7686676
Filing Date: 2010-03-30
Classification: B24B

Abstract:
1. A knife sharpener capable of precision sharpening of hunting and similar knives that have a first and second blade face, each of which terminates at a facet that meets the corresponding facet to create the knife edge where at least the first of the blade faces has a lower distinct planar or concave section adjacent the edge facet, the lower planer or concave section of the face being set at an angle to the center line of the blade thickness that is different from the angle of an adjoining upper section of the same blade face located adjacent to the back of the blade, said sharpener comprising a sharpening member having a sharpening surface, a knife guide having a planar angle knife guide surface designed for intimate sliding and sustaining contact with the second face of the blade in order to position an edge facet on the first of the faces into precise angular relation with said sharpening surface, and a knife holding spring having at least one arm that applies force predominantly against the first face of the blade at one or more locations on the lower planar or concave section of the first face that is adjacent to the edge facet being sharpened in order that only the lower section adjacent the edge on the second face of said blade is dominantly pressured to align with and remain in intimate sliding alignment with said guide surface of knife guide as the blade edge facet on the first face is being sharpened, said knife holding spring arm having an elbow to apply a dominant holding force, a support portion above said elbow, a free end below said elbow, and said free end being a withdrawing shape that can contact the lower blade face.