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Long life intelligent illuminated road marker

  • US 20050244225A1
  • Filed: 04/28/2004
  • Published: 11/03/2005
  • Est. Priority Date: 04/28/2004
  • Status: Active Grant
First Claim
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1. An illuminated road marker, comprising a one piece housing formed of plastic, comprising a top plate and perimeter sides, wherein at least one perimeter side comprises a light transmission surface through which light can be transmitted, and wherein said top plate and said sides define a cavity in said housing;

  • a plurality of light emitting diodes (LEDs) positioned within said cavity such that light produced by said LEDs is transmitted through the same light transmitting surface, wherein said plurality of LEDs are oriented at angles different by 2 to 15 degrees thereby increasing the visibility angle of said road marker;

    a long life battery within said cavity that energizes said LEDs, wherein said battery tolerates trickle charging without deterioration;

    at least one solar cell within said cavity adjacent said top plate, wherein said solar cell recharges said battery; and

    electrical circuitry within said cavity configured to control charging of said battery.

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