Adjustable dual drill assembly

Details Adjustable dual drill assembly Adjustable dual drill assembly

1986-07-02

1987-07-07

Briggs, William R.

Cutting by use of rotating axially moving tool

Machine including plural tools

Plural, simultaneously operational tools

408 79, B23B 3918, B23B 4100

Patent

active

046783784

ABSTRACT:
An adjustable drillhead suitable for mounting on a dual bit drill gun or press is disclosed. The invention allows for variation of the spacing between two drill bits and is especially suited for use in drilling dual holes through a workpiece required for nutplates. Also disclosed are means to locate the drillhead relative to a specific location on a workpiece prior to drilling the dual holes.

REFERENCES:
patent: 1228110 (1917-05-01), Hanson
patent: 2706918 (1955-04-01), Blatt
patent: 2847881 (1958-08-01), Allemann
patent: 2951425 (1960-09-01), Eger
patent: 2963927 (1960-12-01), Hanger
patent: 3526496 (1970-09-01), Haley
patent: 3663115 (1972-05-01), Vindez
patent: 4179229 (1979-12-01), Kitagawa
patent: 4286902 (1981-09-01), Gagliano et al.
patent: 4493595 (1985-01-01), Klein

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