Patent ID: 6345447
Filing Date: 2002-02-12
Classification: B27B

Abstract:
A chain saw comprising a chain rotated by a power unit, whereby the chain is arranged onto a saw flange (5) controlling the chain, wherein the chain is controlled by a chain wheel (4) controlled by the power unit; the saw flange being pivotally mounted on a mounting flange by a tightening device (6) arranged on the saw flange and a bearing piece (7) arranged on the tightening device in order to turn the saw flange on the plane of the mounting flange, whereby the tightening device is arranged to make the saw flange move parallel with its longitudinal axis (A) in order to tighten the chain,the tightening device comprising a mounting piece (8) immovably arranged on the saw flange and a mounting frame (9) arranged on the bearing piece, the mounting piece and the mounting frame being slidably arranged with respect to each other, wherein the mounting piece and the mounting frame supporting the saw flange (5) are interconnected by at least one supporting guide having parts on both sides of a center of the chain wheel (4) and parallel with the longitudinal axis (A) of the saw flange, thus enabling the saw flange to move parallel with its longitudinal axis (A) in regard to the chain wheel.