LED lamp

Patent metadata

Field	Value
Publication number	US-9951909-B2
Application number	US-201414288896-A
Country	US
Kind code	B2
Filing date	May 28, 2014
Priority date	Apr 13, 2012
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

A LED lamp includes an at least partially optically transmissive enclosure and a base. A LED assembly comprising at least one LED is located in the enclosure and is operable to emit light when energized through an electrical path from the base. A heat sink comprises a heat dissipating portion that is at least partially exposed to the ambient environment and a heat conducting portion that is thermally coupled to the at least one LED. The heat sink is connected to the base by a snap fit connector comprising a deformable first member on one of the base or heat sink engaging a second member on the other one of the heat sink and the base. A retention member holds the first member in engagement with the second member. A seal is positioned between the heat sink and the base, the seal being compressed between the heat sink and the base.

First claim

The invention claimed is:

1. A lamp comprising:
a housing containing a reflector;
a base;
an LED assembly comprising at least one LED located in the housing and operable to emit light when energized through an electrical path from the base;
a heat sink comprising a heat dissipating portion that is at least partially exposed to the ambient environment and a heat conducting portion that is thermally coupled to the at least one LED, the heat sink being connected to the base by a snap fit connector comprising a deformable first member on one of the base or heat sink engaging a second member on the other one of the heat sink and the base; and
a retention member mounted on the heat sink that holds the first member in engagement with the second member.

2. The lamp of claim 1 wherein the housing is metal.

3. The lamp of claim 1 wherein the reflector comprises a reflective surface that generates a directional light pattern.

4. The lamp of claim 3 wherein the reflective surface is a faceted metalized surface.

5. The lamp of claim 1 wherein the housing is secured to the heat sink using deformable nubs.

6. The lamp of claim 1 wherein the reflector engages the retention member.

7. The lamp of claim 6 wherein the LED assembly engages the reflector such that the LED assembly holds the reflector in the housing.

8. The lamp of claim 7 wherein a LED assembly retention member engages the LED assembly to hold the LED assembly on the heat sink.

9. The lamp of claim 1 wherein the heat sink extends between the housing and the base.

10. The lamp of claim 1 wherein the heat conducting portion comprises a tower that extends into the enclosure such that that LED assembly is positioned in a center of the enclosure.

11. The lamp of claim 1 further comprising a seal positioned between the heat sink and the base.

12. The lamp of claim 11 wherein the seal is compressed between the heat sink and the base.

13. The lamp of claim 11 wherein the seal is supported on a support, the support being mounted on the base.

14. The lamp of claim 13 wherein the support is removable from the base.

15. A lamp comprising:
an at least partially optically transmissive enclosure;
a base;
a LED assembly comprising at least one LED located in the enclosure and operable to emit light when energized through an electrical path from the base;
a heat sink comprising a heat dissipating portion that is at least partially exposed to the ambient environment and a heat conducting portion that is thermally coupled to the at least one LED, the heat sink being connected to the base by a snap fit connector comprising a deformable first member on one of the base or heat sink engaging a second member on the other one of the heat sink and the base; and
a retention member holding the first member in engagement with the second member.

16. The lamp of claim 15 wherein the enclosure comprises a housing and an optically transmissive lens.

17. The lamp of claim 15 wherein the enclosure is omnidirectionally optically transmissive.

18. The lamp of claim 15 wherein the heat sink extends between the enclosure and the base.

19. The lamp of claim 15 wherein the heat conducting portion comprises a tower that extends into the enclosure such that that LED assembly is positioned in a center of the enclosure.

20. The lamp of claim 15 further comprising a seal positioned between the heat sink and the base.

21. The lamp of claim 20 wherein the seal is compressed between the heat sink and the base.

22. The lamp of claim 20 wherein the seal is supported on a support, the support being mounted on the base.

23. A lamp comprising:
an at least partially optically transmissive enclosure;
a base;
an LED assembly comprising at least one LED located in the enclosure and operable to emit light when energized through an electrical path from the base;
a heat sink comprising a heat dissipating portion that is at least partially exposed to the ambient environment and a heat conducting portion that is thermally coupled to the at least one LED, the heat sink being connected to the base; and
a seal positioned between the heat sink and the base, the seal being compressed between the heat sink and the base.

Assignees

• Cree Inc

Inventors

• Progl Curt
• Power David
• Reier Bart P

Classifications

• F21V29/773

  the planes containing the fins or blades having the direction of the light emitting axis · CPC title

• F21V17/164

  the parts being subjected to bending, e.g. snap joints · CPC title

• F21K9/232 Primary

  specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb · CPC title

• F21Y2107/30

  on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title