Portable drilling apparatus

Details Portable drilling apparatus Portable drilling apparatus

1994-09-15

1996-01-23

Howell, Daniel W.

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

Tool supporting wheel

408 88, 408103, B23B 4514, B23B 4100

Patent

active

054860741

ABSTRACT:
This invention relates to a portable apparatus designed to facilitate the task of locating and drilling of the holes specified on shop drawings for metal plates, structural shapes and non-round tubes. It can be equipped with one or more powered drilling tools. Equipped with two such tools, the apparatus will weigh less than 60 pounds. It can drill one hole at a time or two holes simultaneously; and it is not limited by the length, width, or weight of the workpiece.

REFERENCES:
patent: 530979 (1894-12-01), Williams
patent: 1728367 (1929-09-01), Sapp
patent: 2871730 (1959-02-01), Gremp
patent: 2988934 (1961-06-01), Shlager
patent: 3507025 (1970-04-01), Ankeney
patent: 4108566 (1978-08-01), Jones
patent: 4765785 (1988-08-01), Calzone

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