发明名称 |
Transition plate for a mine roof truss |
摘要 |
A generally rectangular transition plate for connecting inclined and horizontal chords of a mine roof truss has one face defining a generally flat planar plate bearing surface adapted to be closely received against a mine roof. The sides and one end of the plate are bent outwardly from the one face. A first opening in the plate adjacent the one end is adapted to receive a mine roof bolt. A second opening in the plate is located adjacent the other end of the plate. A saddle portion extends between the other end of the plate and the second opening and is adapted to receive a truss tie member. The plate has a low profile and sufficient rigidity to sustain the forces present in the truss.
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申请公布号 |
US4395161(A) |
申请公布日期 |
1983.07.26 |
申请号 |
US19810323151 |
申请日期 |
1981.11.19 |
申请人 |
BETHLEHEM STEEL CORPORATION |
发明人 |
WILSON, EDWIN B.;EBEN, C. FREDERICK;MEYER, CHARLES L.;SCHAEFFER, CHARLES W. |
分类号 |
E21D11/00;(IPC1-7):E21D20/00 |
主分类号 |
E21D11/00 |
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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