Heating system
AssigneeTramec, L.L.C.
InventorMichael M Cubon
Life of this patent
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Abstract
A traffic light with a housing, a light assembly mounted to the housing, a visor extending from the housing surrounding the light assembly. The traffic light further including a heater element having multiple layers.
Claims36
A heating system for a traffic light having at least one light assembly, the heating system including a heater element provided along a portion of the traffic light at least partially surrounding the at least one light assembly,
- wherein the heater element comprises:
- an interface layer;
- a polymer base layer formed from a conductive material;
- a resistive layer formed of a material having an electrical resistance which generates heat in variance with a supply of power provided to the heater element, wherein at least one side of the resistive layer is in contact with the polymer base layer;
- and
- a carrier layer formed of a material impervious to water, wherein the carrier layer covers at least one of the polymer base layer and the resistive layer;
- and
- wherein the polymer base layer and the resistive layer are located between the interface layer and the carrier layer, and a tab extends from each of the carrier layer, the interface layer, the polymer base layer, and the resistive layer.
A heating system for a traffic light having at least one light assembly, the heating system including a heater element provided along a portion of the traffic light at least partially surrounding the at least one light assembly,
- wherein the heater element comprises:
- a polymer base layer formed from a conductive material;
- a resistive layer formed of a material having an electrical resistance which generates heat in variance with a supply of power provided to the heater element, wherein at least one side of the resistive layer is in contact with the polymer base layer;
- and
- a carrier layer formed of a material impervious to water, wherein the carrier layer covers at least one of the polymer base layer and the resistive layer;
- and
- wherein the polymer base layer includes at least a first bus and a second bus spaced apart from the first bus, wherein the first bus and the second bus are electrically connected by the resistive layer;
- and the first bus and the second bus each includes finger portions, and the finger portions of the first bus are spaced apart from and interdigitated with the finger portions of the second bus.
Dependencies are inferred from the claim text.