Hand drill level

Details Hand drill level Hand drill level

1986-01-22

1987-04-14

Martin, Jr., William D.

Geometrical instruments

Indicator of direction of force traversing natural media

Structurally installed including relation to feature thereof

33347, 33371, B23B 4500

Patent

active

046567496

ABSTRACT:
A hand drill level is provided and consists of a mounting frame removably mountable to top surface of a shank portion of a hand drill and a vial that has a bubble chamber operably affixed within the mounting frame and parallel to a longitudinal axis of a drill bit to aid in drilling holes straight through a work piece.

REFERENCES:
patent: 2525387 (1950-10-01), Volk
patent: 2806296 (1957-09-01), Weichert
patent: 3664754 (1972-05-01), Kelbel
patent: 4546549 (1985-10-01), Duperon

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