Light fixture assembly having a heat conductive cover with sufficiently large surface area for improved heat dissipation

• US 10,655,837 B1
• Filed: 01/28/2019
• Issued: 05/19/2020
• Est. Priority Date: 11/13/2007
• Status: Active Grant

• Current Assignee: Silescent Lighting Corporation
• Original Assignee: Silescent Lighting Corporation
• Inventors: Soderman, Daryl, Sutherland, Mark
• Primary Examiner(s): May, Robert J
• Application Number:
  US16/259,647
• Time in Patent Office: 477 Days
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light fixture assembly including an illumination assembly in the form of one or more light emitting diodes is interconnected to an electrical energy source by control circuitry. A mounting assembly supports the illumination assembly and a cover structure is disposed in heat transferring relation to the illumination assembly, wherein the cover structure, which has an enlarged surface area formed of a heat conductive material, defines a decorative exterior of the light fixture and is disposed exterior of a mounting surface, thereby effectively dissipating the heat generated by the LED illumination assembly towards the environment being illuminated by the light fixture.

Claims

1. A light fixture assembly having heat dissipating capabilities, said light fixture assembly comprising:

an illumination assembly,

a mounting assembly at least partially formed of a heat conductive material and disposed in supporting, heat conducting engagement with said illumination assembly,

a cover structure at least partially formed of a heat conductive material and disposed in heat conducting engagement with said mounting assembly and in heat conducting relation to said illumination assembly,

an enlarged exterior surface area defined at least by said cover structure, said enlarged exterior surface area oriented so as to be exposed to an area being illuminated by and forward of said illumination assembly, and having a sufficiently large surface area to define a path of heat flow for a majority of heat generated by said illumination assembly that is forward of and away from said illumination assembly;

said sufficiently large surface area being at least 32 square inches per square inch of light emitting surface of said illumination assembly exposed to an area being illuminated and away from said illuminations assembly so as to radiate said heat generated by said illumination assembly forward therefrom into said area being illuminated and thereby minimize heat at or towards said illumination assembly.

2. A light fixture assembly as recited in claim 1 wherein said mounting assembly is at least partially integrally formed with said cover structure.

3. A light fixture assembly as recited in claim 2 wherein said mounting assembly comprises an enclosure structured to contain portions of said illumination assembly, said enclosure being at least partially recessed within a mounting surface.

4. A light fixture assembly as recited in claim 1 wherein said mounting assembly further defines said enlarged exterior surface area.

5. A light fixture assembly as recited in claim 1 wherein said illumination assembly comprises at least one LED.

6. A light fixture assembly as recited in claim 5 wherein a surface area of said cover structure is at least 0.34 square inches per die having a lumen efficiency of less than 56%.

7. A light fixture assembly as recited in claim 5 wherein a surface area of said cover structure is at least 0.24 square inches per die having a lumen efficiency of less than 81%.

8. A light fixture assembly as recited in claim 1 wherein a surface area of said cover structure is at least 1 square inches per watt consumed by said illumination assembly.

9. A light fixture assembly as recited in claim 1 wherein a surface area of said cover structure is at least 1.5 square inches per watt consumed by said illumination assembly.

10. A light fixture assembly as recited in claim 1 wherein said enlarged exterior surface area of said cover structure includes a stepped configuration.

11. A light fixture assembly as recited in claim 1 wherein said enlarged exterior surface area of said cover structure comprises an anodized exterior surface structured to maximize heat radiating characteristics of said cover structure.

12. A light fixture assembly as recited in claim 1 wherein said enlarged exterior surface area of said cover structure comprises a powder coated exterior surface structured to maximize heat radiating characteristics of said cover structure.

13. A light fixture assembly as recited in claim 12 wherein said enlarged exterior surface area of said cover structure further comprises an anodized exterior surface structured to maximize heat radiating characteristics of said cover structure.