Wood-drilling bit

Details Wood-drilling bit Wood-drilling bit

1991-05-17

1993-03-16

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having peripherally spaced cutting edges

408225, 408214, B23B 5102

Patent

active

051939517

ABSTRACT:
A drill bit includes an elongated shaft with a threaded male end and a cutting head with an axial through-bore having female threads to receive the male end of said shaft in threaded engagement, and there is a bearing surface area between the shaft and the cutting head above the threaded portion which provides for proper alignment and reduced stresses.

REFERENCES:
patent: Re16061 (1925-05-01), Thurston
patent: 1409753 (1922-03-01), Moore
patent: 1943879 (1934-01-01), Rea
patent: 2593823 (1952-04-01), Wilson
patent: 3876319 (1975-04-01), Meyer
patent: 4484833 (1984-11-01), Gallagher
patent: 4658915 (1987-04-01), Goris et al.

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