Road marker or light based warning device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 4, 2017
Grant Date -
Jun 11, 2015
app pub date -
Feb 20, 2015
filing date -
Sep 22, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A road marker and related light based warning device are described. The road marker or device includes a thermal sensor that triggers the illumination of at least one light-emitting diode at a predetermined temperature. The temperature may be associated with ice formation. The light-emitting diode(s) may flash to alert motorists to hazardous road conditions. The road marker or device utilize simple components to increase reliability, particularly when the device is subjected to high heat such as when the device is mounted into hot tar seal. The device further includes a switching element that prevents rapid on/off cycling.
First Claim
Family
International Classification(s)
- E01F:ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CO....
- F21V:FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES....
- G08B:SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; A....
- F21W:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21L,....
- F21Y:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21L,....
- G08G:TRAFFIC CONTROL SYSTEMS
- E01C:CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GR....
- F21S:NON-PORTABLE LIGHTING DEVICES OR SYSTEMS THEREOF
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