专利名称：Multi-purpose drilling tool发明人：Helmut Duscha,August Haussmann申请号：US10558962申请日：20041112公开号：US07401667B2公开日：20080722
专利附图：
摘要：The present invention relates to a multi-purpose drilling tool with a boringhead, a drill twist connected thereto and a downstream clamping shank, a cuttingelement () being provided on the working side of the boring head. The cutting element ()has a face () with a rake angle (γ) having a value of γ≧0° b, the cutting element () having a
flank () with a lip clearance angle (α) having a value of 5°≦α≦15° and, in particular, α≈10°.
申请人：Helmut Duscha,August Haussmann
地址：Ravenburg DE,Ravensburg DE
国籍：DE,DE
代理人：Michael J. Striker
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