File guide for use in sharpening a chain saw

Details File guide for use in sharpening a chain saw File guide for use in sharpening a chain saw

1979-05-14

1980-10-21

Simpson, Othell M.

Metal tools and implements, making

Saw-making or furbishing device or machine

Sharpening and gumming

76 25A, B23D 6310, B23D 6316

Patent

active

042287022

ABSTRACT:
A file guide for use in sharpening a chain saw having a bar, a chain around the periphery of the bar, and a plurality of teeth secured at intervals along the chain, each tooth having a cutting edge at one end thereof constituting its forward end. The file guide comprises a frame adapted to be mounted on the bar of the chain saw, a carriage slidably mounted on the frame for forward and rearward movement relative to the tooth to be sharpened, and a stop carried by the frame for holding the tooth against rearward movement. The carriage has a pair of guide members guiding a file for reciprocation at a predetermined angle relative to the tooth through a cutting stroke of the file for sharpening the tooth at the predetermined angle and a return stroke. The guide members are disposed on opposite sides of the tooth and are spaced longitudinally of the carriage. The carriage is movable rearward so as to position the file in engagement with the cutting edge of the tooth for the cutting stroke of the file and is movable forward so as to position the file out of engagement with the cutting edge of the tooth for the return stroke of the file.

REFERENCES:
patent: 2813438 (1957-11-01), Paradis et al.
patent: 3322000 (1967-05-01), Newman
patent: 3670600 (1972-06-01), Arff
patent: 3744349 (1973-07-01), Juncker

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