Wood bit

Details Wood bit Wood bit

1979-07-16

1981-09-01

Briggs, William R.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having stepped cutting edges

145116R, 408228, B23B 5100, B27G 1500

Patent

active

042869048

ABSTRACT:
Bit for drilling wood or the like consisting of a spade from which extends a centrally-located point, the point being provided with a groove defined by two plane surfaces extending at an obtuse angle.

REFERENCES:
patent: 2689131 (1954-09-01), Priest
patent: 2782824 (1957-02-01), Robinson
patent: 3199381 (1965-08-01), Mackey
patent: 3477481 (1969-11-01), Czerniewicz
patent: 3543820 (1970-12-01), Tulumellu
patent: 3920350 (1975-11-01), Southall
patent: 3920350 (1957-06-01), Huxtable
patent: 3997279 (1976-12-01), Porter et al.

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