| 摘要 |
A rotatable root saw blade for routing through a sewer line for purposes of cutting debris or roots from the interior wall of the sewer line includes a body having an arcuate portion having a forward cutting edge which moves along a substantially circular path when rotated, and the forward cutting edge defines a series of V-shaped teeth therealong. Each V-shaped tooth has a leading cutting edge and a trailing edge which meet at an apex. The leading cutting edge of each tooth is substantially parallel to the direction of axial movement of the saw blade along the length of the sewer line, and the trailing edge of each tooth forms an angle with the direction of axial movement of the blade which is between about 22° and 63°. Furthermore, a notch is defined between each successively-arranged pair of teeth wherein the notch has a depth of between about 0.5 and 1.0 inches as measured from the apex of an adjacent tooth.
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