# US 9,039,223 B2 · LED lighting fixture

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- Number: US 9,039,223 B2
- Document ID: US9039223B2
- Status: Granted
- Kind: B2
- Application number: 13/834,525
- Filed: 2013-03-15
- Published: 2014-04-17
- Granted: 2015-05-26
- Earliest claimed: 2006-09-30
- Assignees: Cree, Inc.
- Applicants: Cree, Inc.
- Inventors: Alan J. Rudd; Kurt S. Wilcox; Steven R. Walczak; Wayne Guilllien
- Web page: https://patentgrep.com/patent/US9039223B2

## CPC

- F21V 29/83: the elements having apertures, ducts or channels, e.g. heat radiation holes
- F21K 9/20: Light sources comprising attachment means
- F21S 2/005: {of modular construction}
- F21S 8/033: {the surface being a wall or like vertical structure, e.g. building facade}
- F21S 8/086: {with lighting device attached sideways of the standard, e.g. for roads and highways}
- F21S 9/022: {Emergency lighting devices}
- F21V 15/013: {the housing being an extrusion}
- F21V 19/003: {Fastening of light source holders, e.g. of circuit boards or substrates holding light sources}
- 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 21/30: Pivoted housings or frames
- F21V 23/009: {the casing being inside the housing of the lighting device}
- F21V 23/02: the elements being transformers, impedances {or power supply units, e.g. a transformer with a rectifier}
- F21V 27/00: Cable-stowing arrangements structurally associated with lighting devices, e.g. reels {(storing lengths of cable in general B65H; the lighting devices being vehicle headlamps F21S41/192; the lighting devices being vehicle lights F21S43/195)}
- F21V 29/507: of means for protecting lighting devices from damage, e.g. housings
- F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V 29/71: using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
- 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 9/00: Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21V 21/005: for several lighting devices in an end-to-end arrangement, i.e. light tracks
- F21W 2131/10: Outdoor lighting
- 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]
- Y10S 362/80: Light emitting diode
- 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
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

An LED lighting fixture including a housing and an LED assembly secured with respect to the housing to permit air/water-flow over the LED assembly. The LED assembly includes a plurality of LED-array modules on an equal plurality of individual heat sinks. The housing defines an air gap permitting air/water-flow to and from the heat sinks.

## Claims

### Claim 1

An LED lighting fixture comprising a housing and an LED assembly secured with respect to the housing such that the LED assembly is open to air and water, the LED assembly including a plurality of LED-array modules on an equal plurality of individual heat sinks, the housing defining an air gap permitting air/water-flow to and from the heat sinks.

### Claim 2 (depends on 1)

The LED lighting fixture of claim 1 wherein the heat sinks are separate structures connected with respect to the housing.

### Claim 3 (depends on 2)

The LED lighting fixture of claim 2 further including at least one connection device holding adjacent pairs of the individual heat sinks with respect to one another.

### Claim 4 (depends on 3)

The LED lighting fixture of claim 3 wherein the connection device is integral with at least one of the adjacent heat sinks.

### Claim 5 (depends on 4)

The LED lighting fixture of claim 4 wherein the connection device holds the adjacent heat sinks in side-by-side relationship to one another.

### Claim 6 (depends on 1)

The LED lighting fixture of claim 1 wherein:
the housing defines a closed chamber; and
at least one electronic driver is within the chamber.

### Claim 7 (depends on 1)

The LED lighting fixture of claim 1 further including a protective cover extending over the LED assembly and secured with respect to the housing, the protective cover having perforations permitting air/water-flow therethrough.

### Claim 8 (depends on 1)

The LED lighting fixture of claim 1 wherein the housing is a perimetrical structure with first and second border structures being on opposed perimetrical sides of the LED assembly and a frame structure is secured on a perimetrical side between the border structures.

### Claim 9 (depends on 8)

The LED lighting fixture of claim 8 wherein the perimetrical structure is substantially rectangular and includes a pair of opposed frame structures each connected to the first and second border structures.

### Claim 10 (depends on 8)

The LED lighting fixture of claim 8 wherein each heat sink has two heat -sink ends, one heat-sink end being at the first border structure and the other heat-sink end being at the second border structure.

### Claim 11 (depends on 10)

The LED lighting fixture of claim 10 wherein the venting gap is between at least one of the heat-sink ends and the corresponding border structure.

### Claim 12 (depends on 1)

The LED lighting fixture of claim 1 wherein each heat sink is an extrusion having a module-engaging surface and a heat-dissipating surface.

### Claim 13 (depends on 12)

The LED lighting fixture of claim 12 wherein, in each heat sink, the heat-dissipating surface includes at least one fin protruding therefrom.

### Claim 14 (depends on 13)

The LED lighting fixture of claim 13 further including at least one connection device holding adjacent pairs of the individual heat sinks with respect to one another.

### Claim 15 (depends on 14)

The LED lighting fixture of claim 14 wherein the connection device is integral with at least one of the adjacent heat sinks.

### Claim 16 (depends on 14)

The LED lighting fixture of claim 14 wherein the connection device holds the adjacent heat sinks in side-by-side relationship to one another.