发明名称 |
DEVICE FOR MAKING HOLES WITH INTERCUTTING |
摘要 |
2.1 In high-strength, in particular reinforced, concrete parts, the drill holes are produced with a diamond drilling tool which has an axial through-bore for the cooling and flushing liquid. After the cylindrical drill hole is produced, an undercut is reamed at the depth of the drill hole using a separate reaming device. …<??>2.2 So that drill holes with an undercut can be produced in one operation with the same diamond drilling tool, the shank of the drilling tool is provided with a stop collar and a widening in cross-section which narrows towards the drill head and the stop collar and on the outer surface of which longitudinal flutes are arranged. …<IMAGE>… |
申请公布号 |
EP0454950(A3) |
申请公布日期 |
1992.10.28 |
申请号 |
EP19910101491 |
申请日期 |
1991.02.05 |
申请人 |
FISCHERWERKE ARTUR FISCHER GMBH & CO. KG |
发明人 |
FISCHER, ARTUR, PROF.DR.H.C. |
分类号 |
B23B41/06;B23B51/00;B28D1/14;(IPC1-7):B23B51/00 |
主分类号 |
B23B41/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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