Polygonal mortising drill tool arrangement

Details Polygonal mortising drill tool arrangement Polygonal mortising drill tool arrangement

1993-02-08

1994-03-29

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Combined cutting means

Including plunging cutter

144 78, B23B 5108

Patent

active

052979032

ABSTRACT:
A mortising device directed to project a polygonal bore within a workpiece is provided to include a parallelepiped guide tube having a drill bit rotatably mounted therewithin, with the guide tube having window slots arranged throughout alternating walls of the guide tube, with intermediate walls of the guide tube intermediate the alternating walls containing the drill bit in an aligned relationship, with a lowermost end of the guide tube having a continuous chisel edge for projection into an underlying workpiece to effect formation of the polygonal hole structure.

REFERENCES:
patent: 1683763 (1928-09-01), de Walt
patent: 2334830 (1943-11-01), Mansfield
patent: 2622638 (1952-12-01), Sanders
patent: 2821218 (1958-01-01), Hultquist

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