| 摘要 |
<p>A saw blade ( 1 ) intended for a handheld working tool, and the saw blade comprises a blade body ( 2 ) having an outer periphery ( 3 ) with a number of teeth ( 4 ) arranged by fastening a separate part or through a local addition of a surface lining material. The teeth occupy less than 0,2 times of the periphery ( 3 ) of the saw blade and in that rotation-wise in front of at least a tooth ( 4 ) there is a notch ( 5 ) that runs towards the center of the saw blade and this notch has a narrow opening ( 6 ) at the periphery and preferably widens considerably inside the opening to a widened part ( 7 ) and the widened part has a width (b) that is greater than 1,3 times the width (a) of the opening. Rotation-wise in front of the narrow opening ( 6 ) the outer periphery ( 3 ) of the blade body ( 2 ) has a maximum radius essentially from a center ( 11 ) of the saw blade and this maximum radius is maintained during at least 55% in succession, and preferably during at least 70%, of a peripheral distance from the narrow opening to the start of the next tooth and the tooth ( 4 ) has an edge ( 8 ) at its outer foremost end, i.e. first in the direction of rotation and a front side ( 9 ) of the tooth ( 4 ) at the edge ( 8 ) forms a negative rake angle alpha from the edge and to the center ( 11 ) of the saw blade, and the angle alpha is greater than 0 degrees and preferably greater than 8 degrees but smaller than 30 degrees.</p> |
