Road structure – process – or apparatus – Traffic steering device or barrier
Reexamination Certificate
2005-02-01
2005-02-01
Hartmann, Gary S. (Department: 3671)
Road structure, process, or apparatus
Traffic steering device or barrier
C404S010000, C049S049000, C049S131000
Reexamination Certificate
active
06848856
ABSTRACT:
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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Flynn ,Thiel, Boutell & Tanis, P.C.
Hartmann Gary S.
National Sign & Signal Co.
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