Drill
AssigneeGebrüder Heller Drinklage GmbH
InventorHeinrich Kersten
Life of this patent
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Abstract
A drill having a drill head with a drill shank extending between the drill head and a plug-in end lying opposite the drill head, said drill shank having a conveying helix formed by at least two helical flutes and webs located between the flutes. The flutes comprise the same clear cross section at least in the region of the end of the drill shank adjacent the drill head and are arranged at an angle a in a range of 130° through 170° relative to one another.
Claims17
A drill comprising a drill head, a drill shank, said drill shank having a conveying helix formed by at least two helical flutes and webs located between the flutes and having a plug-in end lying opposite the drill head, said two flutes comprising the same clear cross section at least in the region of the end of the drill shank adjacent the drill head and the flutes being arranged at an angle a in a range of 130° through 170° relative to one another.
Dependencies are inferred from the claim text.