Method and apparatus for controlling saw chain tension

Details Method and apparatus for controlling saw chain tension Method and apparatus for controlling saw chain tension

1991-08-09

1992-09-08

Watts, Douglas D.

Cutlery

Cutting tools

Saw

30383, B23D 5702

Patent

active

051447517

ABSTRACT:
Method and apparatus for manually applying a selected fit of a saw chain loop to a chain saw. A tensioning procedure is performed simply by loosening a guide bar hold-down screw. The loosened guide bar is slightly spaced away from the mounting plate of the chain saw as a spring extends the guide bar relative to a drive sprocket which tightens the saw chain. The hold-down screw, which has an inclined axis, is then tightened to force the saw bar obliquely toward the mounting plate, simultaneously forcing the guide bar in a longitudinal direction that backs off the saw chain tension by a predetermined amount.

REFERENCES:
patent: 4026020 (1977-05-01), Hoppner et al.
patent: 4563817 (1986-01-01), Leighton
patent: 4920650 (1990-05-01), Edlund
patent: 4999918 (1991-03-01), Schliemann et al.

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