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A saw tool comprises a housing for incorporating a driving device therein, a base attached to the housing, a driving arm connected to the driving device to effect a reciprocating orbital motion, and a saw blade attached to the driving arm and extending through a slit in the base. The saw blade has a

A saw tool comprises a housing for incorporating a driving device therein, a base attached to the housing, a driving arm connected to the driving device to effect a reciprocating orbital motion, and a saw blade attached to the driving arm and extending through a slit in the base. The saw blade has a first saw tooth section formed on a top end thereof for biting a workpiece and a second saw tooth section formed on one side thereof. A rectangular through-hole can be accurately and rapidly formed in a workpiece such as a plaster board or veneer board, etc., with this saw tool. That is, a cutting method of the present invention comprises the steps of biting the workpiece with the first saw tooth section of the saw blade in the reciprocating orbital motion, while pressing a top end of the base and the top end of the saw blade against the workpiece, penetrating the saw blade through the workpiece, and subsequently, cutting the workpiece with the second saw tooth section by moving the saw blade along a cutting line on the workpiece. As a result, a cutting operation of one side of the rectangular through-hole is finished. By repeating the above cutting operation to each side of the rectangular through-hole, the rectangular through-hole is formed in the workpiece without drilling a starting through-hole in the workpiece.

대표청구항 ▼

[ What is claimed is:] [1.] A saw tool for cutting a board workpiece having at least one planar surface with a saw blade having a reciprocating orbital stroke while moving a base of said saw tool along said planar surface of said workpiece, said saw tool comprising a housing containing an elongated

[ What is claimed is:] [1.] A saw tool for cutting a board workpiece having at least one planar surface with a saw blade having a reciprocating orbital stroke while moving a base of said saw tool along said planar surface of said workpiece, said saw tool comprising a housing containing an elongated grip having a longitudinal axis said base being fixedly attached to said housing and having a slit therein, drive means enclosed in said housing, except for said grip, and connected to a driving arm to effect a reciprocating orbital motion therein, and said saw blade having one end attached to said driving arm and its other end extending through said slit in said base, said grip on said housing being a solitary grip which extends at an acute angle with respect to said base such that said longitudinal axis of said grip intersects a forward end of said base, said saw blade being of a length to dispose said saw blade on a side of said base opposite that on which said driving arm is disposed during the entire orbital stroke thereof, said saw blade being defined by substantially parallel sides and an end portion connecting said sides at said other end, a first saw tooth section formed on said saw blade end portion and containing an edge of arcuate shape having saw teeth disposed thereon to establish a bite between said saw blade and said workpiece when said forward end of said base and said arcuate edge of said blade are pressed against said planar surface of said workpiece and said tool is moved to pivot said base about said forward end thereof, and a second saw tooth section being formed on one side of said blade and containing saw teeth particularly shaped to facilitate cutting of said workpiece when said saw tool is moved in one linear direction along said workpiece surface.