# US 9,039,241 B2 · LED light fixture

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- Number: US 9,039,241 B2
- Document ID: US9039241B2
- Status: Granted
- Kind: B2
- Application number: 14/087,971
- Filed: 2013-11-22
- Published: 2014-03-20
- Granted: 2015-05-26
- Earliest claimed: 2008-04-04
- Assignees: Cree, Inc.
- Applicants: Cree, Inc.
- Inventors: Brian Kinnune; Alan J. Ruud; Kurt Wilcox; Don Miletich
- Web page: https://patentgrep.com/patent/US9039241B2

## CPC

- F21V 29/83: the elements having apertures, ducts or channels, e.g. heat radiation holes
- F21V 15/01: Housings, e.g. material or assembling of housing parts (F21V15/02 takes precedence {housings forming signs or letters G09F13/04})
- F21V 15/013: {the housing being an extrusion}
- F21V 15/015: Devices for covering joints between adjacent lighting devices; End coverings
- F21V 17/107: {using hinge joints}
- F21V 19/0055: {by screwing}
- 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)}
- 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}
- F21V 23/009: {the casing being inside the housing of the lighting device}
- 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 H10H20/858)
- F21V 29/507: of means for protecting lighting devices from damage, e.g. housings
- F21V 29/74: with fins or blades
- F21V 29/75: with fins or blades having different shapes, thicknesses or spacing
- F21V 29/763: {the planes containing the fins or blades having the direction of the light emitting axis}
- F21V 31/03: with provision for venting {(for vehicle head lights F21S45/33; for vehicle rear lights F21S41/192)}
- F21K 9/20: Light sources comprising attachment means
- F21S 2/005: {of modular construction}
- F21S 8/086: {with lighting device attached sideways of the standard, e.g. for roads and highways}
- F21W 2131/103: of streets or roads
- F21W 2131/40: Lighting for industrial, commercial, recreational or military use
- F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements
- F21Y 2115/10: Light-emitting diodes [LED]
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## 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

### Claim 1

An LED light fixture comprising:
a housing;
a heat sink secured with respect to the housing and having a base with front and back surfaces, the back surface being open to water/air flow thereover;
an LED arrangement at the front surface of the heat sink; and
at least one closed channel extending along the base and spaced therefrom for receiving wire connections for the LED arrangement.

### Claim 2 (depends on 1)

The LED light fixture of claim 1 wherein:
the LED arrangement comprises at least first and second LED modules, the first LED module being proximal to the housing; and
the at least one closed channel receives wiring extending to/from the second LED module.

### Claim 3 (depends on 2)

The LED light fixture of claim 2 wherein the first and second LED modules are in end-to-end relationship to one another such that the second LED module is distal from the housing.

### Claim 4 (depends on 3)

The LED light fixture of claim 3 wherein the housing comprises a wire-access(es) receiving wires to/from the first LED module proximal to the housing.

### Claim 5 (depends on 4)

The LED light fixture of claim 4 wherein the housing and the heat sink define at least one venting gap therebetween.

### Claim 6 (depends on 2)

The LED light fixture of claim 2 wherein the at least one closed channel extends along the back surface of the base.

### Claim 7 (depends on 6)

The LED light fixture of claim 6 wherein the least one closed channel is at least partially formed by the heat sink.

### Claim 8 (depends on 7)

The LED light fixture of claim 7 wherein the heat sink includes parallel fins extending from the back surface, the least one elongate channel being formed along the fin(s).

### Claim 9 (depends on 7)

The LED light fixture of claim 7 wherein the heat sink is an extrusion forming the at least one elongate closed wiring channel therealong.

### Claim 10 (depends on 2)

The LED light fixture of claim 2 further comprising at least one venting gap therebetween the housing and the heat sink.

### Claim 11 (depends on 10)

The LED light fixture of claim 10 wherein the housing comprises a wire-access(es) receiving wires from the first LED module proximal to the housing.

### Claim 12 (depends on 10)

The LED light fixture of claim 10 further comprising at least one venting aperture through the base.

### Claim 13 (depends on 12)

The LED light fixture of claim 12 wherein the at least one closed channel extends along the back surface of the base.

### Claim 14 (depends on 13)

The LED light fixture of claim 13 wherein the least one closed channel is at least partially formed by the heat sink.

### Claim 15 (depends on 14)

The LED light fixture of claim 14 wherein the heat sink includes parallel fins extending from the back surface, the least one elongate channel being formed along the fin(s).

### Claim 16 (depends on 14)

The LED light fixture of claim 14 wherein the heat sink is an extrusion forming the at least one elongate closed wiring channel therealong.

### Claim 17 (depends on 1)

The LED light fixture of claim 1 wherein the heat sink is an extrusion forming the at least one elongate closed wiring channel therealong.

### Claim 18 (depends on 17)

The LED light fixture of claim 17 wherein the heat sink includes parallel fins extending from the back surface, the least one elongate channel being formed along the fin(s).

### Claim 19 (depends on 1)

The LED light fixture of claim 1 wherein the housing includes a closed chamber enclosing at least one LED driver.