Metal tools and implements – making – Saw-making or furbishing device or machine – Sharpening and gumming
Patent
1982-01-22
1984-02-07
Parker, Roscoe V.
Metal tools and implements, making
Saw-making or furbishing device or machine
Sharpening and gumming
29 78, 76 25A, B23D 6310, B23D 6316
Patent
active
044295960
ABSTRACT:
An apparatus for use in combination with a specialized rotary steel file for enabling the sharpening of saw chains that includes an inverted channel-shaped body for accommodating a chain saw bar and saw chain therein. Adjustable chain centering elements serve to limit and predetermine the desired spatial relationship of the body and the bar which can be secured by clamping screws engageable with the bar. A recess in the body constitutes a window giving access to the saw chain, with guide grooves in the body at the bottom of the recess serving to position the rotary file during the sharpening procedure. A chain advancing unit is provided for properly advancing one tooth at a time to register properly a tooth to be filed with the grooves. A gauge is positionable in the recess to enable dressing gauge teeth of the saw chain to proper height is also provided. The preferred form of file is a rotary file of an overall cylindrical configuration conformable to the guide grooves; such file having a plurality of closely nested helical teeth inclined steeply to the file axis, and a loosely nested plurality of helical flutes of opposite inclination of less than about 15.degree..
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patent: 3172307 (1965-03-01), Kephart
patent: 3313184 (1967-04-01), Granberg
patent: 3744349 (1973-07-01), Juncker
patent: 4173908 (1979-11-01), Aksamit
Breidenthal Robert E.
Parker Roscoe V.
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