Chuck sleeve insert for a drill
AssigneeCredo Tool Company
InventorsJuergen Wiker, David H. Byrley, Zane Lockhart, Jr., Debbie Ann Newhouse, Gregory A. Phillips
Life of this patent
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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.
Claims15
A sleeve for a drill bit comprising:
- a cylindrical body having a top end, an opposed end, and a centrally disposed opening;
- and,
- means to receive a cutting end of a twist drill bit having two flutes, said means being attached to said top end of said cylindrical body, said means to receive said cutting end of a twist drill bit being a pair of flexible helically-shaped longitudinally extending members in spaced mating relation.
In combination with a double-ended drill bit, a sleeve for said drill bit comprising:
- a cylindrical body having a top end, an opposed end, and a centrally disposed opening therethrough;
- and,
- means to receive a cutting end of a twist drill bit having two flutes, said means being attached to said top end of said cylindrical body, said means to receive said cutting end of a twist drill bit being a pair of flexible helically-shaped longitudinally extending members in spaced mating relation.
Dependencies are inferred from the claim text.