B - Operations – Transporting – 23 – D
Patent
B - Operations, Transporting
23
D
B23D 61/02 (2006.01) B27B 33/08 (2006.01)
Patent
CA 2703386
A bi-directional cutting saw blade is provided. A cutting edge is disposed on leading and trailing rims of each saw tooth of a saw blade body, so that the saw blade can produce a cutting effect in both directions of forward and reverse rotations, thereby prolonging the service life of the saw blade. An unsharpened obtuse angle of the trailing cutting edge of the saw tooth of the saw blade can scrape off burrs and debris of a cut to make the cut smooth. When a trailing cutting edge of a previous saw tooth of the saw blade is still in a cut, a leading cutting edge of a next saw tooth has cut into the workpiece, so that the saw blade does not offset from the cutting direction when cutting a workpiece. In the application to a pair of dual saw blades for forward and reverse rotational cutting, salient points are disposed on one of the saw blades so that the dual saw blades are coaxially and tightly spaced to form a narrow gap, thereby reducing high frictional heat produced in the cutting operation, preventing deformation of the saw blades, and enhancing the cutting effect.
Chen Chung-Kuang
Mcfadden Fincham
LandOfFree
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