发明名称 |
Flexible shaft for a roof drill |
摘要 |
A flexible shaft with an inner sleeve defining a hollow core for chip removal. A cylindrical rod is wound right handed into a helical configuration about the sleeve, the convolutions of the rod being in close adjacency with one another. A flat band is wound left handed into a helical configuration about the rod, adjacent convolutions of the band being in nesting relationship with one another.
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申请公布号 |
US4057115(A) |
申请公布日期 |
1977.11.08 |
申请号 |
US19760684019 |
申请日期 |
1976.05.07 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE INTERIOR |
发明人 |
BLANZ, JOHN |
分类号 |
B23B31/08;B23B47/22;B23B51/00;B23Q1/00;E21B7/02;E21B17/20;E21B21/015;E21D20/00;E21D21/00;(IPC1-7):B23Q5/00 |
主分类号 |
B23B31/08 |
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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