Road structure – process – or apparatus – Traffic director – Attenuated lane marker type
Reexamination Certificate
2008-03-25
2008-03-25
Hartmann, Gary S. (Department: 3671)
Road structure, process, or apparatus
Traffic director
Attenuated lane marker type
C404S016000, C404S071000, C340S928000
Reexamination Certificate
active
11568654
ABSTRACT:
Provided herein is a road stud used to recognize the central line or lanes of a road. The road stud is configured in the form of a screw to be securely fixed to and buried in a road. The road stud includes a self generator to light up an illuminating element all the time irrespective of the existence and absence of sunshine or illumination, humidity and temperature sensors for sensing the condition of the road to emit different color lights in response to various conditions of the road, and a communication unit for transmitting/receiving information about the condition of the road to/from cars. The road stud has strong shock-resistance and smoothly emit light irrespective of existence or absence of external power supply or the quantity of sunshine. Furthermore, the road stud can indicate various road conditions by different colors of light-emitting diodes using measurement values of the temperature sensor and the humidity sensor and inform an ITS of the road conditions through the communication unit such that drivers can be informed of the traffic condition of the road where the road stud is buried.
REFERENCES:
patent: 4925335 (1990-05-01), Eigenmann
patent: 4926163 (1990-05-01), Beebe
patent: 4993868 (1991-02-01), Eigenmann
patent: 5710558 (1998-01-01), Gibson
patent: 6602021 (2003-08-01), Kim
patent: 6726398 (2004-04-01), Hamakawa et al.
patent: 7258507 (2007-08-01), Kim et al.
patent: 2004/0119609 (2004-06-01), Solomon
patent: 2006/0193691 (2006-08-01), Gonzalez et al.
patent: 1 537 756 (1979-01-01), None
patent: 5-89514 (1993-12-01), None
Hartmann Gary S.
Sughrue & Mion, PLLC
LandOfFree
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