发明名称 |
Yielding Bolt and Assembly |
摘要 |
A mine roof bolt includes an elongated rod and a polymer coating layer. The elongated rod has a first end and a second end with a protruding portion extending radially outward from the elongated rod. The polymer coating layer covers at least a portion of the elongated rod between the first and second ends. The elongated rod is movable relative to the polymer coating layer in an axial direction. The elongated rod has a first position where the elongated rod has a predetermined axial position relative to the polymer coating layer and a second position where the elongated rod has a displaced axial position relative to the first position.
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申请公布号 |
US2011052332(A1) |
申请公布日期 |
2011.03.03 |
申请号 |
US20100873887 |
申请日期 |
2010.09.01 |
申请人 |
FCI HOLDINGS DELAWARE, INC. |
发明人 |
OLDSEN JOHN G.;WU YAOKUN;LAMOTHE MARC W. |
分类号 |
E21D21/00 |
主分类号 |
E21D21/00 |
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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