发明名称 |
Structure of lightweight bars and connector means therefore |
摘要 |
A lightweight bar comprising a hollow, elongated member having channels within and extending along its faces, said member being composed of sheet material formed into the required configuration of the member and having a pair of edges joined together to close the cross section of the member.
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申请公布号 |
US4069638(A) |
申请公布日期 |
1978.01.24 |
申请号 |
US19750604150 |
申请日期 |
1975.08.13 |
申请人 |
SCANOVATOR AB |
发明人 |
HASSELQVIST, STIG ERNST ALLAN;THORESON, ANDERS VICTOR |
分类号 |
B21C37/10;E04B1/24;E04C3/04;E04C3/07;E04C3/32;(IPC1-7):E04C3/32 |
主分类号 |
B21C37/10 |
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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