Hazardous location lighting fixture with a housing including heatsink fins

• US 8,602,599 B2
• Filed: 02/19/2013
• Issued: 12/10/2013
• Est. Priority Date: 05/11/2010
• Status: Active Grant

• Current Assignee: Dialight Corporation (Dialight PLC)
• Original Assignee: Dialight Corporation (Dialight PLC)
• Inventors: Zimmer, Kenneth J., Peck, John P.
• Primary Examiner(s): GRAMLING, SEAN P
• Application Number:
  US13/770,625
• Publication Number:
  US 20130155687A1
• Time in Patent Office: 294 Days
• Field of Search: 362/294, 362/249.02
• US Class Current: 362/294
• CPC Class Codes: F21V 25/12 Flameproof or explosion-proof arrangements
• 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 29/773 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 7/0008 providing for indirect lighting
• CPC Class Codes: F21V 7/005 with an elongated shape to cooperate with linear light sources
• CPC Class Codes: F21V 7/0058 adapted to cooperate with light sources of shapes different from point-like or linear, e.g. circular light sources
• CPC Class Codes: F21V 7/0066 specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified F21V7/16 - F21V7/30 take precedence
• CPC Class Codes: F21V 7/04 Optical design
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21W 2131/105 of arenas or the like
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An LED (light emitting diode) illumination device that can generate a uniform light output illumination pattern. The illumination device includes an array of LEDs, each having a LED central axis. The LED central axis of the array of LEDs is angled approximately toward a central point. The illumination source includes a reflector with a conic or conic-like shape. The reflector wraps around the front of the LED to redirect the light emitted along a LED central axis. A housing of the LED illumination device can include a plurality of heatsink fins at a periphery, and a band can be formed within or outside of the heatsink fins.

Claims

1. A hazardous location lighting fixture comprising:

a light emitting diode (LED) light source;

a housing holding the LED light source, the housing comprising;

a conduit mount opening; and

a plurality of heatsink fins, wherein the plurality of heatsink fins have rounded outer edge portions at a top portion and a bottom portion of the plurality of heatsink fins formed at an outer side, wherein the plurality of heatsink fins extends above and below the LED light source;

a flat float glass lens;

a ring to compressively attach the flat float glass lens to the housing;

wherein the housing comprises a lens mating surface, wherein an outer perimeter edge area of the lens mating surface has a machined surface;

wherein a gap is formed along the lens mating surface in an inside of the housing;

a band member provided around a periphery of the plurality of heatsink fins to extend beyond an outer edge of the plurality of heatsink fins, the band member being integrally molded with the plurality of heatsink fins;

wherein a height of the band member is at least 5 times greater than its width, and

wherein channels are formed between the plurality of heatsink fins and the band member through which air is allowed to pass.

2. The hazardous location lighting fixture according to claim 1, wherein the gap is between 9 millimeters (mm) and 50 mm from an outer edge of the flat float glass lens.

3. The hazardous location lighting fixture according to claim 1, further comprising a first gasket and a second gasket, wherein the first gasket is a protecting gasket and is used between the flat float glass lens and the ring, and wherein the second gasket is a sealing gasket and is used between the flat float glass lens and the housing.

4. The hazardous location lighting fixture according to claim 1, wherein the LED light source is located between the conduit mount opening and the flat float glass lens.

5. The hazardous location lighting fixture according to claim 1, further comprising a power supply to power the LED light source, wherein the LED light source is located between the conduit mount opening and the flat float glass lens.

6. The hazardous location lighting fixture according to claim 1, wherein a conduit mount enters the hazardous location lighting fixture in approximately a center of the hazardous location lighting fixture.