Title:
ドリル工具
Document Type and Number:
Japanese Patent JP4676051
Kind Code:
B2
Abstract:
The drilling tool has a shaft (2) with at least two spiral conveying grooves (3,4) for dust and a drill head (5) with cutters (7-9) of hard metal, which project radially from the edge of the drill head and are separated by grooves (10,12) for boring dust. There are more grooves for boring dust than there are conveying grooves into which they open. At least one groove pair (10,12) opens into a common conveying groove (4). The groove pair is connected to the conveying groove by a spiral groove section (13), whose cross-section is smaller than the common conveying groove.
Inventors:
Werner Kleine
Hans-Werner Vongels-Ambrosius
Hans-Werner Vongels-Ambrosius
Application Number:
JP2000272904A
Publication Date:
April 27, 2011
Filing Date:
September 08, 2000
Export Citation:
Assignee:
Maschinenbau Hilti OHG
International Classes:
B23B51/00; B25D17/02; E21B10/00; B28D1/14; E21B10/40; E21B10/44; E21B10/58
Domestic Patent References:
| JP9177465A | ||||
| JP1204705A | ||||
| JP62130808U |
Attorney, Agent or Firm:
Kenji Sugimura
Tatsuya Sawada
Kosaku Sugimura
Junko Sugimura
Tatsuya Sawada
Kosaku Sugimura
Junko Sugimura