Pilot hole borer

Details Pilot hole borer Pilot hole borer

1976-09-16

1977-12-06

Hinson, Harrison L.

Cutting by use of rotating axially moving tool

Machine including plural tools

Plural, simultaneously operational tools

144 92, 144325, 408 48, 408 53, 408127, 408241G, B23B 3916

Patent

active

040614379

ABSTRACT:
A manually operable boring apparatus powered by compressed air drills precisely located pilot holes in cabinet doors to assist in the installation of apertured cabinet hinges. Upon the command of an operator, the hole boring apparatus causes a drill assembly containing three rapidly rotating drill bits to extend one-quarter inch into the rear face of a cabinet door. The boring apparatus further includes a bracket and retractable indexing pins which locate the drill bits a predetermined distance from the end of the cabinet door.

REFERENCES:
patent: 1660372 (1928-02-01), Bockhoff
patent: 2670545 (1954-03-01), Kaminski
patent: 3230797 (1966-01-01), Murschel
patent: 3260137 (1966-07-01), Obmann
patent: 3797363 (1974-03-01), Nohejl
patent: 3884280 (1975-05-01), Chailer

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