发明名称 |
Drilling bit for blast furnace tap holes |
摘要 |
A drilling bit for blast furnace tap holes and the like which facilitates rapid drilling of clay within the tap hole and which can be readily and easily machined to accommodate tap holes of different diameters. The bit is characterized in having inclined cutting edges which converge into a point and are separated by flutes into which compressed air is forced to rapidly dislodge the drilled clay from between the cutting edges. By virtue of the convergence of the cutting edges into a point, the bit becomes self-centering during the drilling operation.
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申请公布号 |
US4273202(A) |
申请公布日期 |
1981.06.16 |
申请号 |
US19790008993 |
申请日期 |
1979.02.05 |
申请人 |
WOODINGS INDUSTRIAL CORPORATION |
发明人 |
PHILLIPS, PAUL S.;FORSYTHE, GLENN |
分类号 |
C21B7/12;E21B10/38;E21B10/40;E21B10/62;E21B15/04;(IPC1-7):E21B10/00 |
主分类号 |
C21B7/12 |
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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