LED light fixture

• US 9,261,271 B2
• Filed: 05/22/2015
• Issued: 02/16/2016
• Est. Priority Date: 04/04/2008
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Kinnune, Brian, Ruud, Alan J., Wilcox, Kurt, Miletich, Don
• Primary Examiner(s): BRUCE, DAVID VERNON
• Application Number:
  US14/719,359
• Publication Number:
  US 20150252999A1
• Time in Patent Office: 270 Days
• Field of Search: 362/218, 362/294, 362/373
• US Class Current: 1/1
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21S 2/005 of modular construction
• CPC Class Codes: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• CPC Class Codes: F21V 15/01 Housings, e.g. material or assembling of housing parts F21V15/02 takes precedence housings forming signs or letters G09F13/04
• CPC Class Codes: F21V 15/013 the housing being an extrusion
• CPC Class Codes: F21V 15/015 Devices for covering joints between adjacent lighting devices; End coverings
• CPC Class Codes: F21V 17/107 using hinge joints
• CPC Class Codes: F21V 19/0055 by screwing
• CPC Class Codes: F21V 19/04 with provision for changing light source, e.g. turret auxiliary devices for cleaning, placing, or removing incandescent lamps H01K3/32, fluorescent lamps H01J9/006
• CPC Class Codes: F21V 23/002 Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21V 29/503 of light sources cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H01L33/64
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/763 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 31/03 with provision for venting for vehicle head lights F21S45/33; for vehicle rear lights F21S41/192
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21W 2131/40 Lighting for industrial, commercial, recreational or military use
• CPC Class Codes: F21Y 2105/10 : comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 : Light-emitting diodes [LED]

Abstract

An LED light fixture a housing, a heat sink secured with respect to the housing, the heat sink has a base with front and back surfaces, and an LED arrangement mounted at the front surface of the heat sink. The back surface of the heat sink is open to water/air flow thereover. The LED light fixture also includes at least one closed channel extending along the base and spaced therefrom for receiving wire connections for the LED arrangement. The at least one closed channel receives wiring extending to/from the second LED module. The LED arrangement may include at least first and second LED modules, the first LED module being proximal to the housing with the at least one closed channel receiving wiring extending to/from the second LED module. The first and second LED modules may be in end-to-end relationship to one another such that the second LED module is distal from the housing.

Claims

1. A light fixture comprising:

a chamber with at least one power-circuitry driver therewithin;

an extruded base supporting at least one LED module outside the chamber; and

a pair of extruded side channels each extending along a respective side of the extruded base.

2. The light fixture of claim 1 wherein the extruded base has a heat-dissipating section open to water/air flow.

3. The light fixture of claim 2 wherein the heat-dissipating section has heat-dissipating surfaces extending from the base in a direction opposite the least one LED module.

4. The light fixture of claim 3 wherein the chamber is formed by a housing which defines an air gap permitting air/water-flow therethrough.

5. The light fixture of claim 4 wherein the air gap is between the extruded base and the chamber.

6. The light fixture of claim 5 wherein the extruded base is a separate structure secured with respect to the housing.

7. The light fixture of claim 1 wherein the extruded base and the pair of extruded side channels are of a single-piece extrusion.

8. The light fixture of claim 7 wherein:

the chamber is defined by a housing; and

the single-piece extrusion is secured with respect to the housing with an air gap therebetween, the air gap permitting air/water-flow therethrough.

9. The light fixture of claim 8 wherein the extruded portion has side and upper surfaces which are substantially fully exposed to air/water-flow.

10. The light fixture of claim 1 wherein the extruded base supports a plurality of LED modules.

11. The light fixture of claim 10 wherein the extruded base has at least one venting aperture therethrough.

12. The light fixture of claim 11 wherein the at least one venting aperture is between a pair of adjacent LED modules.

13. The light fixture of claim 12 wherein the venting aperture is across at least a majority of the width of the extruded base.

14. The light fixture of claim 11 further comprising at least one air gap between the extruded base and the chamber.

15. The light fixture of claim 14 wherein the chamber is defined by a housing, the housing defining the at least one air gap.

16. The light fixture of claim 15 wherein the extruded base and the pair of extruded side channels are of a single-piece extrusion, the single-piece extrusion is a separate structure secured with respect to the housing.

17. The LED light fixture of claim 16 wherein the housing and the single-piece extrusion define the at least one air gap therebetween.