发明名称 |
Rectractable pylon arrangement |
摘要 |
A pylon or barrier arrangement which is recessed into the ground or other surface and includes a post-like pylon which is movable between an extended position for control of vehicular or pedestrian traffic, and a retracted position beneath the ground. Movement of the pylon is achieved by a linear-type drive mechanism which acts as a clutch by decoupling from an upright and rotatable smooth drive shaft during abrupt downward driving of the pylon to avoid damage to the internal components of the arrangement. A sealing arrangement is provided for preventing the entry of debris into the interior of the pylon arrangement, and a heating unit is provided for preventing seizure of the arrangement during harsh weather conditions.
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申请公布号 |
US6848856(B2) |
申请公布日期 |
2005.02.01 |
申请号 |
US20030645315 |
申请日期 |
2003.08.20 |
申请人 |
NATIONAL SIGN & SIGNAL CO. |
发明人 |
JOHNSON DWIGHT DAVID |
分类号 |
E01F9/017;E01F9/019;E01F13/04;(IPC1-7):E06B11/00 |
主分类号 |
E01F9/017 |
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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