Cutting by use of rotating axially moving tool – Tool-support
Patent
1996-09-04
1998-01-06
Howell, Daniel W.
Cutting by use of rotating axially moving tool
Tool-support
408239R, 408239A, 279143, B23B 5102
Patent
active
057047456
ABSTRACT:
A double-ended drill bit having opposed cutting ends of different structural configurations is provided in combination with a sleeve or holder to be received within a drill chuck. The sleeve is provided with a cylindrical body having a top end with a pair of helically-shaped longitudinally extending members in spaced mating relation attached thereto. One cutting end of a drill bit is received within the cylindrical body and the spaced helically-shaped members.
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Byrley David H.
Lockhart, Jr. Zane
Newhouse Debbie Ann
Phillips Gregory A.
Wiker Juergen
Credo Tool Company
Howell Daniel W.
Lamb Charles G.
Tsai Henry W. H.
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