Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1988-11-10
1990-04-03
Schmidt, Frederick R.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
51285, 51354, 76 82, B24B 336, B24B 354
Patent
active
049128850
ABSTRACT:
A knife sharpener having a base, a pair of leg assemblies, a cover, and a pair of rod members formed of abrasive material. The leg assemblies each have an elongated leg member having a pivot pin passing downwardly therethrough to secure the leg member to the top surface of the base. The pivot ends of the respective leg assemblies are secured to the base at a position adjacent each other so that their free motion ends can pivot toward and away from each other. A spring is connected to the leg assemblies for maintaining a pressure that will force the free motion ends of the respective leg members apart from each other. The rod members are detachably supported in apertures formed in the top surface of the free motion ends of the respective leg members and the respective apertures are angularly oriented toward each other so that the rod members cross paths with one another to form a V and it is within this V that the blade of a knife would be passed in order to sharpen the cutting edge of the knife. The downward force of the knife blade when it is being sharpened causes the rod members on the respective leg members to pivot toward each other and when the pressure is released the spring will return them to their initial unloaded positions.
REFERENCES:
patent: 1952106 (1934-03-01), Vierling
patent: 2124646 (1938-07-01), Barsch
patent: 4073094 (1978-02-01), Walz
Logan II Charles C.
Schmidt Frederick R.
Watson Bruce P.
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