| 发明名称 |
Weighted pulley system crowd control stanchion |
| 摘要 |
A crowd control stanchions having an extendible tape in which a weighted pulley system rather than a spring mechanism is used to maintain tape tension when the tape is extended and to retract the tape.
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| 申请公布号 |
US6969050(B1) |
申请公布日期 |
2005.11.29 |
| 申请号 |
US20000684658 |
申请日期 |
2000.10.10 |
| 申请人 |
LOEBNER HUGH G |
发明人 |
LOEBNER HUGH G |
| 分类号 |
E01F13/02;E04H17/00;(IPC1-7):E04H17/00 |
主分类号 |
E01F13/02 |
| 代理机构 |
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