Luminaire having light pipe assembly and method of assembly

• US 10,338,307 B2
• Filed: 08/01/2017
• Issued: 07/02/2019
• Est. Priority Date: 08/01/2017
• Status: Active Grant

• Current Assignee: Kenall Manufacturing Company (Legrand SA)
• Original Assignee: Kenall Manufacturing Company (Legrand SA)
• Inventors: Dahlen, Kevin, Stolte, Brandon
• Primary Examiner(s): Alavi, Ali
• Application Number:
  US15/666,262
• Publication Number:
  US 20190041572A1
• Time in Patent Office: 700 Days
• CPC Class Codes: F21V 19/0015 Fastening arrangements intended to retain light sources
• CPC Class Codes: F21V 23/0464 the sensor sensing the level of ambient illumination, e.g. dawn or dusk sensors
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 6/0096 the lights guides being of the hollow type

Abstract

A luminaire with a light pipe assembly and related methods of assembly are provided. According to one aspect, the luminaire may include a housing and lens covering an opening formed in the housing. A light source may be disposed in the housing and configured to emit artificial light in a forward direction toward the lens. The light pipe assembly may span at least a portion of a distance between the lens and the light source, and may be configured to transport ambient light rays present in an environment outside of the housing to a location within the housing isolated from the artificial light.

Claims

1. A luminaire comprising:

a housing;

a first lens covering an opening formed in the housing;

a light source disposed in the housing and configured to emit artificial light in a forward direction toward the first lens; and

a light pipe assembly spanning at least a portion of a distance between the first lens and the light source, the light pipe assembly being configured to transport ambient light rays present in an environment outside of the housing to a location within the housing isolated from the artificial light.

2. The luminaire of claim 1, the light pipe assembly including an elongated light pipe member having a light entry end and a second end, the light entry end being positioned to receive the ambient light rays.

3. The luminaire of claim 2, the light pipe assembly including a collar member arranged around the light entry end of the elongated light pipe member.

4. The luminaire of claim 3, a first end of the collar member being inserted into an opening formed in the first lens and a second end of the collar member engaging an interior surface of the first lens, wherein the first end of the collar member is configured to inhibit artificial light internally reflected within the first lens from entering the light entry end of the elongated light pipe member.

5. The luminaire of claim 4, the second end of the collar member including a funnel-shaped interior surface such that a cross-sectional area of an opening formed in the second end of the collar member gradually decreases when moving from the second end of the collar member toward the first end of the collar member.

6. The luminaire of claim 4, an interior surface of the second end of the collar member being configured to sealingly engage an exterior surface of the light entry end of the elongated light pipe member so as to inhibit the artificial light from leaking into the light entry end of the elongated light pipe member.

7. The luminaire of claim 4, the light pipe assembly including a second lens covering the light entry end of the elongated light pipe member.

8. The luminaire of claim 7, an exterior surface of the second lens being substantially level with an exterior surface of the first lens.

9. The luminaire of claim 3, the elongated light pipe member including an opaque exterior surface so as to inhibit the artificial light from being transmitted through a wall of the elongated light pipe member.

10. The luminaire of claim 1, comprising a sensor positioned to receive at least some of the ambient light rays transported through the elongated light pipe member.

11. The luminaire of claim 10, the sensor being positioned at least partially within the second end of the elongated light pipe member.

21. The luminaire of claim 2, the light entry end of the elongated light pipe member being aligned with an opening formed in the first lens.

22. The luminaire of claim 2, the elongated light pipe member including an opaque exterior surface to inhibit the artificial light from being transmitted through a wall of the elongated light pipe member.

12. A light pipe assembly for a luminaire, the light pipe assembly comprising:

an elongated light pipe member having a light entry end and a second end; and

a collar member arranged around the light entry end of the elongated light pipe member, the light entry end of the elongated light pipe member extending into and terminating within the collar member, the collar member having an interior surface configured to sealingly engage an exterior surface of the light entry end of the elongated light pipe member.

13. The light pipe assembly of claim 12, the collar member including a first end and a second end, the second end of the collar member including a flange disposed radially outwardly of the first end of the collar member.

14. The light pipe assembly of claim 13, the interior surface of the second end of the collar member being funnel-shaped such that a cross-sectional area of an opening formed in the second end of the collar member gradually decreases when moving from the second end of the collar member toward the first end of the collar member.

15. The light pipe assembly of claim 12, comprising a lens covering an opening formed in the light entry end of the light pipe member.

16. The light pipe assembly of claim 12, comprising an O-ring positioned between the interior surface of the collar member and the exterior surface of the light pipe member.

23. The light pipe assembly of claim 12, the collar member having an annular ridge extending inwardly from the interior surface, wherein the annular ridge abuts a terminal end surface of the light entry end of the elongated light pipe member.

24. The light pipe assembly of claim 12, the elongated light pipe member including an opaque exterior surface to inhibit light from being transmitted through a wall of the elongated light pipe member.

17. A method of assembling a luminaire, the method comprising:

providing

a housing including an opening,

a light source connected within the housing and configured to emit artificial light toward the opening, and

an elongated light pipe member connected within the housing, the elongated light pipe member having a light entry end positioned adjacent to the opening and a second end positioned adjacent to the light source;

inserting a collar member into an opening formed in a first lens;

aligning an opening formed in the collar member with the light entry end of the elongated light pipe member; and

covering the opening formed in the housing with the first lens such that the light entry end of the elongated light pipe member is received within the opening formed in the collar member.

18. The method of claim 17, wherein inserting the collar member into the opening formed in the first lens comprises inserting a first end of the collar member into the opening formed in the first lens until a second end of the collar member engages an interior surface of the first lens.

19. The method of claim 18, wherein covering the opening formed in the housing with the first lens such that the light entry end of the elongated light pipe member is received within the opening formed in the collar member comprises using a funnel-shaped interior surface of the collar member to guide the light entry end of the elongated light pipe member into the collar member.

20. The method of claim 17, comprising covering an opening formed in the light entry end of the elongated light pipe member with a second lens.