Cutting by use of rotating axially moving tool – Machine including plural tools – Plural – simultaneously operational tools
Patent
1991-03-25
1992-02-04
Howell, Daniel W.
Cutting by use of rotating axially moving tool
Machine including plural tools
Plural, simultaneously operational tools
408 51, 408 53, 408112, B23B 4100
Patent
active
050855433
ABSTRACT:
This hand tool is a portable tool, to be used on a construction site to drill pilot holes for the standard 41/2" hinge used on doors in the majority of commercial buildings. It's light-weight, small and powered by any 3/8" drill motor. Base of tool is used to align the drills in place on the routed out section of door or jamb. The 4 hole configuration the tool has is a standard location used by the main door hinge manufacturers. The main advantage of the tool is the accuracy of the holes drilled. The labor time is cut by 75% over the old conventional way of drilling the holes in the hard wood one at a time for the accommodation of the screws that hold the hinge in place.
REFERENCES:
patent: 629294 (1899-07-01), Heady
patent: 2492391 (1949-12-01), Minsk
patent: 2879675 (1959-03-01), Morris
patent: 3499353 (1970-03-01), Ewell
patent: 4061437 (1977-12-01), Strange et al.
patent: 4917549 (1990-04-01), Geernaert
Howell Daniel W.
Neyerlin Wallace F.
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