Metal tools and implements – making – Tool sharpeners – Cutting
Patent
1990-06-27
1991-03-12
Parker, Roscoe V.
Metal tools and implements, making
Tool sharpeners
Cutting
29 80, B21K 1700, B23D 6712
Patent
active
049989561
ABSTRACT:
A molded plastic cylindrical housing has an axially extending quadrant opening and includes a recess extending axially in the housing and in the vertical and horizontal right angle guide surfaces of the quadrant opening, with the recess being in communication with the quadrant opening. A file having a plurality of vertically and horizontally disposed coarse teeth at right angles to each other is mounted on a peripheral shoulder in the recess that slopes upwardly from one end of the shoulder to the other so the coarse teeth of the file slope upwardly from one end of the sharpener to the other, from a position at the end of the sharpener in the direction of the sharpening movement where the coarse teeth are below or flush with the right angle guide surfaces, and progressively extend outwardly from the guide surfaces to a position at the other end of the file where the coarse teeth protrude approximately 0.015" from the vertical and horizontal right angle guide surfaces, whereby the metal edge of a ski or snowboard is guided by said guide surfaces into smooth engagement with the progressively protruding right angle coarse teeth for smoothly drawing a sharp edge thereon.
REFERENCES:
patent: D295142 (1988-04-01), Patrick
patent: 3670601 (1972-06-01), Weeks
patent: 4241624 (1980-12-01), Strojny
patent: 4280378 (1981-07-01), Levine
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