Cutting by use of rotating axially moving tool – Tool or tool with support – Having peripherally spaced cutting edges
Patent
1996-04-02
1997-11-11
Howell, Daniel W.
Cutting by use of rotating axially moving tool
Tool or tool with support
Having peripherally spaced cutting edges
606 80, 606180, B23B 5102
Patent
active
056856733
ABSTRACT:
A twist drill comprising a shank section at a top of the drill and a body section at a bottom of the drill, the body section having two or more flutes which spiral downwardly in a first direction and terminate proximate a point, the drill having cutting lips formed by the flutes and operatively arranged to cut material when the drill is rotated in a second direction opposite that of the orientation of the spiral flutes.
REFERENCES:
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patent: 5065647 (1991-11-01), Johnson
patent: 5078554 (1992-01-01), Kubota
patent: 5273380 (1993-12-01), Musacchia
patent: 5405155 (1995-04-01), Kanaan et al.
Howell Daniel W.
Tsai Henry W. H.
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