Spiral knife sharpener

Details Spiral knife sharpener Spiral knife sharpener

1975-06-12

1977-04-26

Smith, Al Lawrence

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

56250, B24B 342

Patent

active

040192873

ABSTRACT:
The cutting cylinder of a forage harvester has helically oriented knives which may be sharpened by shifting a spinning grinding stone back and forth across the housing for the cylinder in parallel relationship with the axis of rotation of the cylinder. Opposed sets of roller guides which move with the stone in its straight line reciprocation trap the blade being sharpened and force the cylinder to rotate to such an extent and in such a direction as to continuously maintain the bevel on the knife engaged with the stone, thereby compensating for the helical orientation of the knife. One set of roller guides rides along the normally leading edge of the knife being sharpened, while the other set of opposed roller guides rides along the outer surface of the knife being sharpened.

REFERENCES:
patent: 1154712 (1915-09-01), Meyer
patent: 1187807 (1916-06-01), Boling
patent: 2187289 (1940-01-01), Utterback
patent: 3019568 (1962-02-01), Sauers
patent: 3479776 (1969-11-01), Berg
patent: 3793792 (1974-02-01), Wagstaff
patent: 3863403 (1975-02-01), Fleming

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