B - Operations – Transporting – 23 – D
Patent
B - Operations, Transporting
23
D
B23D 49/10 (2006.01) B23D 49/11 (2006.01) B23D 61/12 (2006.01)
Patent
CA 2320463
A saw blade, saw and method for making circular openings in construction materials. The saw is adapted to be attached to a handle, motor and holder assembly so that an up and down stroking motion can be provided to the saw blade. The saw blade is concave in cross-section along substantially its whole length, and the degree of curvature of the blade is the same throughout the length of the blade that is concave in cross-section. The degree of curvature is that necessary to make a circular opening of the size desired. To make the opening, a circle of the size of the opening desired is drawn on the construction material, a hole is drilled in the construction material inside and abutting the circle of a size slightly larger than that necessary to receive the blade, the blade is inserted in the hole, and the cutting edge of the blade is moved around the circle.
Montana Electric Inc.
Rogers Law Office
LandOfFree
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