公开(公告)号：EP2692983B1

公开(公告)日：2017-02-01

申请号：EP13003872.2

申请日：2013-08-02

申请人： Irwin Industrial Tool Company

发明人： Eggers, Rainer ,  Probst, Florian ,  Hulm, Walter ,  Geier, Manfred

IPC分类号： E21B10/36 ,  E21B10/44 ,  E21B10/55 ,  E21B10/58

CPC分类号： E21B10/36 ,  E21B10/445 ,  E21B10/55 ,  E21B10/58

公开(公告)号：EP2692983A1

公开(公告)日：2014-02-05

申请号：EP13003872.2

申请日：2013-08-02

申请人： Irwin Industrial Tool Company

发明人： Eggers, Rainer ,  Probst, Florian ,  Hulm, Walter ,  Geier, Manfred

IPC分类号： E21B10/36 ,  E21B10/44 ,  E21B10/55 ,  E21B10/58

CPC分类号： E21B10/36 ,  E21B10/445 ,  E21B10/55 ,  E21B10/58

摘要： A Drill head (1) made of hard metal for a drill, such as a rock drill, comprises a mounting side to be turned towards a drill shaft of said drill for mounting said drill head on said drill shaft and a free cutting side with three main cutting edges (21, 41, 61), each having a particularly straight direction of extension (29, 49, 69) with a predominant radial direction component (K) pointing towards an axial work rotation axis R) of said drill, and said directions of extension (29, 49, 6) limit two adjacent main bore dust discharge sectors (A, B) each spanning a main sector angle, respectively, of which two are greater than 120°.