Adjustable LED light fixture for use in a troffer

• US 10,274,171 B2
• Filed: 01/06/2017
• Issued: 04/30/2019
• Est. Priority Date: 01/06/2017
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Goelz, Dave, Adams, John
• Primary Examiner(s): Hanley, Britt D
• Application Number:
  US15/400,212
• Publication Number:
  US 20180195673A1
• Time in Patent Office: 844 Days
• Field of Search: None
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21V 13/04 the elements being reflectors and refractors for vehicle rear lights F21S43/40
• CPC Class Codes: F21V 14/04 by movement of reflectors in vehicle head lamps F21S41/675
• CPC Class Codes: F21V 15/015 Devices for covering joints between adjacent lighting devices; End coverings
• CPC Class Codes: F21V 17/02 with provision for adjustment F21V17/04 - F21V17/08 take precedence
• CPC Class Codes: F21V 23/004 arranged on a substrate, e.g. a printed circuit board
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21V 7/005 with an elongated shape to cooperate with linear light sources
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

The light fixture is configured to be mounted in a troffer. The light fixture includes a light emitting assembly including at least one LED and a reflector assembly. A mechanical attachment mechanism is configured to be connected directly between the light fixture and a troffer. The mechanical attachment mechanism is adjustable such that a distance between the light fixture and the troffer may vary. The mechanical attachment mechanism may comprise at least one bracket pivotably connected to the light fixture, a cable having an attachment structure wherein the effective length of the cable is adjustable, a telescoping bracket having an attachment structure wherein the effective length of the telescoping bracket is adjustable, a threaded member having an attachment structure wherein the effective length of the threaded member is adjustable by a threaded nut that engages the threaded member. The mechanical attachment mechanism positively secures the light fixture to the troffer without gaps to create an electrical enclose that prevents risk of fire or shock.

Claims

1. A light fixture configured to be mounted in a troffer, comprising:

a light emitting assembly comprising at least one LED;

a reflector assembly; and

a mechanical attachment mechanism configured to be connected directly between the light fixture and a troffer, the mechanical attachment mechanism comprising an attachment structure configured to be secured to the troffer, the distance between the attachment structure and the light fixture being adjustable such that a distance between the light fixture and the troffer may vary, wherein the mechanical attachment mechanism comprises at least one bracket pivotably connected to the light fixture.

2. The fixture of claim 1, wherein the reflector assembly comprises a back reflector, the back reflector comprising at least two reflectors, wherein a first one of the two reflectors is movable relative to the light emitting assembly.

3. The fixture of claim 2, wherein the reflector assembly comprises two end reflectors where at least one of the two side reflectors is moveable relative to the light emitting assembly.

4. The fixture of claim 1, wherein the distance between the attachment structure and the light fixture is adjustable by pivoting of the bracket.

5. The fixture of claim 1, wherein the mechanical attachment mechanism comprises two brackets pivotably connected to the light fixture.

6. The fixture of claim 5, wherein the two brackets are secured to one another.

7. The fixture of claim 4, wherein the at least one bracket is secured against pivoting movement.

8. A light fixture configured to be mounted in a troffer having a size, comprising:

a light emitting assembly comprising at least one LED;

a reflector assembly; and

a mechanical attachment mechanism secured to the light fixture and a troffer, the mechanical attachment mechanism comprising an attachment structure spaced from the light fixture, the position of the attachment structure being adjustable relative to the light fixture such that the distance between the attachment structure and the light fixture is changeable;

wherein the reflector assembly comprises a back reflector, the back reflector comprising at least two reflectors, wherein at least one of the two reflectors is movable relative to the light emitting assembly to adjust a size the reflector assembly to fit the size of the troffer.

9. The fixture of claim 8, wherein the mechanical attachment mechanism comprises at least one bracket pivotably connected to the light fixture where the distance between the attachment structure and the light fixture is changed by pivoting of the bracket.

10. The fixture of claim 9, wherein the mechanical attachment mechanism comprises two brackets pivotably connected to the light fixture.

11. The fixture of claim 10, wherein the two brackets are secured to one another.

12. The fixture of claim 8, wherein the mechanical attachment mechanism mechanically secures the light fixture directly to the troffer to create an enclosure independently of any surrounding support system.

13. The fixture of claim 8, wherein the mechanical attachment mechanism comprises a cable wherein the effective length of the cable is adjustable to change the distance between the attachment structure and the light fixture.

14. The fixture of claim 8, wherein the mechanical attachment mechanism comprises a telescoping bracket comprising a plurality if sections movable relative to one another wherein the effective length of the telescoping bracket is adjustable to change the distance between the attachment structure and the light fixture.

15. The fixture of claim 8, wherein the mechanical attachment mechanism comprises a threaded member wherein the effective length of the threaded member is adjustable by a threaded nut that engages the threaded member to change the distance between the attachment structure and the light fixture.

16. The fixture of claim 9, wherein two mechanical attachment mechanisms are secured to the light fixture and a troffer where the distance between the attachment structure and the light fixture is different for a first one of the two mechanical attachment mechanisms than distance between the attachment structure and the light fixture for a second one of the two mechanical attachment mechanisms.

17. A light fixture and a troffer having a size, comprising:

the light fixture comprising a light emitting assembly comprising at least one LED and a reflector assembly;

the light fixture being positioned at least partially inside of the troffer to fix the position of the light fixture relative to the troffer in a first plane; and

a mechanical attachment mechanism secured to the light fixture and a troffer, the mechanical attachment mechanism fixing the light fixture to the troffer in a second plane perpendicular to the first plane,

wherein the reflector assembly comprises two end reflectors where at least one of the two end reflectors is moveable relative to the light emitting assembly to adjust a size the reflector assembly to fit the size of the troffer.

18. A light fixture configured to be mounted in a troffer, comprising:

a light emitting assembly comprising at least one LED;

a reflector assembly; and

a mechanical attachment mechanism configured to be connected directly between the light fixture and a troffer, the mechanical attachment mechanism comprising an attachment structure configured to be secured to the troffer, the distance between the attachment structure and the light fixture being adjustable such that a distance between the light fixture and the troffer may vary, wherein the mechanical attachment mechanism comprises a cable having an attachment structure wherein the effective length of the cable is adjustable to change the distance between the attachment structure and the light fixture.

19. A light fixture configured to be mounted in a troffer, comprising:

a light emitting assembly comprising at least one LED;

a reflector assembly; and

a mechanical attachment mechanism configured to be connected directly between the light fixture and a troffer, the mechanical attachment mechanism comprising an attachment structure configured to be secured to the troffer, the distance between the attachment structure and the light fixture being adjustable such that a distance between the light fixture and the troffer may vary, wherein the mechanical attachment mechanism comprises a telescoping bracket having an attachment structure wherein the effective length of the telescoping bracket is adjustable to change the distance between the attachment structure and the light fixture.

20. A light fixture configured to be mounted in a troffer, comprising:

a light emitting assembly comprising at least one LED;

a reflector assembly; and

a mechanical attachment mechanism configured to be connected directly between the light fixture and a troffer, the mechanical attachment mechanism comprising an attachment structure configured to be secured to the troffer, the distance between the attachment structure and the light fixture being adjustable such that a distance between the light fixture and the troffer may vary, wherein the mechanical attachment mechanism comprises a threaded member having an attachment structure wherein the effective length of the threaded member is adjustable by a threaded nut that engages the threaded member to change the distance between the attachment structure and the light fixture.