发明名称 |
Hollow rod and method of making and using |
摘要 |
A hollow reinforcing rod insertable into a bored hole is a mine roof and assembled just before insertion therein from a plurality of coiled reinforcing elements of pultruded glass filament reinforced thermoset resin, the rod being cut from the coils after insertion in the hole.
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申请公布号 |
US4504175(A) |
申请公布日期 |
1985.03.12 |
申请号 |
US19830534270 |
申请日期 |
1983.09.22 |
申请人 |
OWENS-CORNING FIBERGLAS CORPORATION |
发明人 |
ZION, EARL M. |
分类号 |
E21D20/02;E21D21/00;(IPC1-7):E21D20/02 |
主分类号 |
E21D20/02 |
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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