Outdoor lighting fixture

• US 9,163,808 B1
• Filed: 05/04/2012
• Issued: 10/20/2015
• Est. Priority Date: 05/04/2012
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Cooper Technologies Company (Eaton Corporation PLC.)
• Inventors: Lehman, Gregg Arthur, Nimma, Sridhar Reddy
• Primary Examiner(s): Lee, John-Suk (James)
• Assistant Examiner(s): Kryukova, Erin
• Application Number:
  US13/464,528
• Time in Patent Office: 1,264 Days
• Field of Search: 362/373, 362/294, 362/264, 362/218, 362/547, 362/217.1, 362/800, 362/153.1, 362/152, 361/679.46, 361/679.55, 361701-704, 361707-713, 361/679.01, 361/690, 361/692, 361/693, 413 58- 65, 285335-380
• US Class Current: 1/1
• 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 15/015 Devices for covering joints between adjacent lighting devices; End coverings
• CPC Class Codes: F21V 17/20 by toggle-action levers
• CPC Class Codes: F21V 19/0055 by screwing
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• 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 31/005 Sealing arrangements therefor
• 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: F21Y 2101/00 Point-like light sources
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2113/00 Combination of light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A outdoor lighting fixture includes an enclosure, a heatsink, and an end-cap. The enclosure includes a cabinet and a cover that enclose control and power circuitry to provide power to illuminate a light source. The cabinet further includes an attachment face, and the extruded heatsink can be coupled to the attachment face. The extruded heatsink includes sides, a discontinuous plane of material formed with sides of the heatsink to provide a recessed mounting tray, and heat-conducting fins extending from the plane of material. The light source, which can include an LED light source, is coupled to the heatsink. The extruded heatsink can be coupled at one end to the attachment face of the cabinet at a position such that a space remains between the plane of material and a bottom edge of the attachment face, to permit water to drain from between the heat-conducting fins of the extruded heatsink.

Claims

1. A lighting fixture, comprising:

an enclosure comprising a cabinet having an attachment face;

a heatsink coupled to the attachment face and disposed, at least in part, external to the enclosure and adjacent to the enclosure, the heatsink comprising;

a substantially planar mounting tray; and

a plurality of heat-conducting fins extending from a first side of the substantially planar mounting tray;

a gasket disposed between the attachment face and the heatsink; and

a light source mounted to a second side of the substantially planar mounting tray,

wherein the heatsink comprises a bottom edge that extends below a bottom edge of the cabinet of the enclosure to create a lateral space, wherein the lateral space allows water that collects on the heatsink to drain therethrough, and

wherein the lateral space allows air to pass therethrough,

wherein the gasket comprises a plurality of first drainage openings, wherein each first drainage opening is disposed adjacent to the heatsink and between two of the plurality of heat-conducting fins.

2. The lighting fixture of claim 1, further comprising an end-cap, wherein the heatsink is coupled to the attachment face of the enclosure at a first end of the heatsink and the end-cap is coupled to a second opposing end of the heatsink.

3. The lighting fixture of claim 1, wherein the heatsink further comprises sidewalls of the substantially planar mounting tray that reflect light away from the sky.

4. The lighting fixture of claim 1, wherein the heatsink is coupled to the attachment face with a lateral gap between the heatsink and a cover.

5. The lighting fixture of claim 1, wherein the heatsink further includes an elongated center channel.

6. The lighting fixture of claim 1, wherein the substantially planar mounting tray includes at least one elongated mounting eye opening.

7. The lighting fixture of claim 1, further comprising a threaded eyelet strip disposed within at least one elongated mounting eye opening.

8. The lighting fixture of claim 7, wherein the light source is coupled to the second side of the substantially planar mounting tray by the threaded eyelet strip disposed within the at least one elongated mounting eye opening.

9. The lighting fixture of claim 1, wherein the heatsink comprises two separate heatsinks each coupled to the attachment face of the enclosure.

10. The lighting fixture of claim 1, wherein the attachment face comprises a wiring pass-through, and an annular pass-through lip.

11. The lighting fixture of claim 1, further comprising a gasket plate disposed between the gasket and the attachment face.

12. The lighting fixture of claim 1, wherein the light source comprises a light module having an array of LEDs disposed on a substrate.

17. The lighting fixture of claim 11, wherein the gasket plate comprises a plurality of second drainage openings, wherein each second drainage opening is disposed in the lateral space between two adjacent heat-conducting fins among the plurality of heat-conducting fins.

18. The lighting fixture of claim 1, wherein the enclosure further comprises a cover, wherein the cover, when closed against the cabinet of the enclosure, is substantially planar with the bottom edge of the heatsink, and wherein the cover, when closed against the cabinet of the enclosure, forms a gap with the bottom edge of the heatsink.

13. A lighting fixture, comprising:

a housing comprising a plurality of sides defining an enclosure, the housing comprising an attachment face on one of the plurality of sides;

a plurality of electrical components disposed within the enclosure;

a heatsink coupled to the attachment face and comprising;

at least a first side and opposing second side;

a substantially planar mounting tray disposed between the first and second sides and integrally formed with the first and second sides;

a gasket coupled to and at least partially disposed between the attachment face and the heatsink;

a gasket plate coupled to the attachment face and at least partially disposed between the gasket and the attachment face; and

a light module comprising an array of light emitting diode (LED) light sources coupled to the substantially planar mounting tray,

wherein the heatsink is disposed such that a top surface of the substantially planar mounting tray is vertically offset below a bottom surface of the attachment face,

wherein the gasket comprises a plurality of first drainage openings,

wherein the gasket plate comprises a plurality of second drainage openings that are aligned with the plurality of first drainage openings,

wherein the plurality of first drainage openings and the plurality of second drainage openings allow water to drain from the heatsink therethrough.

14. The lighting fixture of claim 13, wherein the substantially planar mounting tray is vertically recessed with respect to a bottom side of each of the first and second sides of the heatsink.

15. The lighting fixture of claim 14, further comprising a plurality of heatsink fins coupled to and extending up from a top surface of the substantially planar mounting tray,

wherein each pair of aligned drainage openings in the gasket and gasket plate are positioned above the top surface of the substantially planar mounting tray and between pairs of adjacent ones of the plurality of heatsink fins.

16. The lighting fixture of claim 13, wherein the heatsink further includes an elongated center channel and the substantially planar mounting tray includes at least one elongated mounting eye opening.