B - Operations – Transporting – 26 – D
Patent
B - Operations, Transporting
26
D
B26D 1/09 (2006.01) B23D 49/00 (2006.01) B23D 49/11 (2006.01) B27B 19/00 (2006.01) H02G 3/00 (2006.01) H02G 3/12 (2006.01)
Patent
CA 2241104
A cutting tool and associated positioning templates locate and cut rectangular junction box holes in dry wall or similar sheet material forming structural surfaces. Templates defining a medial positioning slot and providing a pair of spaced positioning pins are carried by pre-established junction boxes and surface sheeting material is established thereover with the positioning pins projecting through the sheet material to indicate positioning slot location. The tool provides a body articulately carrying two perpendicular pairs of spaced parallel saw blades that are moved reciprocably by spring biased driving linkage to cut rectilinear holes in the sheet material over the junction boxes. The saw blades have convexly arcuate edges defining cutting teeth of opposite pitch on each side of the arcuate edge of the tool to aid positional maintenance and prevent chatter during cutting. A positioning blade carried by the body and extending beyond the saw blades passes through sheet material between the positioning pins and into the positioning orifice of the positioning template for tool positioning. The tool is partially covered by a peripheral casement carried by the body and is powered by an independent powering source positionally maintained by the casement.
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