Chain saw tensioning mechanism

Details Chain saw tensioning mechanism Chain saw tensioning mechanism

1991-12-11

1992-12-29

Watts, Douglas D.

Cutlery

Cutting tools

Saw

30385, 30387, B27B 1714

Patent

active

051740290

ABSTRACT:
A mechanism for tensioning the chain of a chain saw. The apparatus includes a cutting bar around which the chain extends. The cutting bar has a base portion mounted to an operating housing of the chain saw, and a distal portion carried by the base portion at an end thereof remote from the housing. The distal portion of the cutting bar is disposed for sliding extension relative to the base portion of the cutting bar. The distal portion of the cutting bar mounts a sprocket, around which the chain passes, at an outer end thereof. The sprocket is disposed for rotation about an axis. Structure is included to effect extension of the distal portion of the cutting bar relative to the base portion thereof. Tensioning of the chain saw is, thereby, accomplished.

REFERENCES:
patent: 2532981 (1950-12-01), Wolfe
patent: 3194284 (1965-07-01), Walker
patent: 3279508 (1966-10-01), Ehlen et al.
patent: 3636995 (1972-01-01), Newman
patent: 3866320 (1975-02-01), Progl
patent: 4129943 (1978-12-01), Bricker
patent: 4361960 (1982-12-01), Halverson
patent: 4382334 (1983-05-01), Reynolds
patent: 4567658 (1986-02-01), Wissmann et al.
patent: 4920650 (1990-05-01), Edlund

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