| 发明名称 |
Concrete dowel void former |
| 摘要 |
A void former or dowel sleeve adapted to be encapsulated in a hardened mass of concrete, which is collapsible upon the application of a tensile force longitudinally thereof to remove the void former from the concrete and provide a void for a load transferring dowel.
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| 申请公布号 |
US7487949(B2) |
申请公布日期 |
2009.02.10 |
| 申请号 |
US20030729763 |
申请日期 |
2003.12.05 |
| 申请人 |
DAYTON SUPERIOR CORPORATION |
发明人 |
BENNETT CLIFFORD D. |
| 分类号 |
B28B7/34;B28B7/30;B29C33/76;E01C11/14;E04G15/06 |
主分类号 |
B28B7/34 |
| 代理机构 |
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代理人 |
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