Flame protected optic

Patent metadata

Field	Value
Publication number	US-12333967-B2
Application number	US-202418770053-A
Country	US
Kind code	B2
Filing date	Jul 11, 2024
Priority date	Oct 1, 2021
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

Various embodiments described herein are directed to luminaire components that prevent flame transmission from the inside of a luminaire to the outside of a luminaire. In certain aspects, the luminaire can be used in an environment containing flammable gas, for example, in specialized lab work or testing applications. This application discusses components that can be used to prevent flame transmission from the inside of a luminaire to the outside of a luminaire, thereby yielding a flame encapsulating luminaire. Accordingly, the components and assemblies described herein can be safely integrated with systems that operate in the presence flammable gas.

First claim

What is claimed is:

1. An LED array comprising:
an LED protective lens array including,
a body having a first surface; and
a plurality of LED protective lenses extending from the body, each including an LED accommodating cavity;
a pcb board having a second surface with a plurality of individual LED elements, wherein the first surface of the body is configured to be attached to the second surface of the pcb board by way of an adhesive material applied to the first surface and/or the second surface;
wherein the LED accommodating cavities are configured to overlay the plurality of individual LED elements disposed on the pcb board; and
wherein attaching the LED protective lens array to the pcb board via the adhesive forms a mechanical seal between the LED protective lens array and the pcb board that disallows a flame from travelling into or out of at least one of the LED accommodating cavities when the LED protective lens array is attached to the pcb board.

2. The LED array of claim 1 , wherein the LED protective lenses are in a rectangular configuration.

3. The LED protective lens array of claim 1 , wherein the LED accommodating cavity includes a plurality of inner walls forming tiered, concentric, conical cavities of differing slopes, diameters, and heights.

4. The LED protective lens array of claim 1 , wherein the plurality of LED protective lenses includes four LED protective lenses arranged in a 2×2 configuration.

5. The LED protective lens array of claim 1 , wherein the adhesive is a cement.

6. A luminaire system comprising:
a luminaire enclosure;
a pcb board, disposed in the luminaire enclosure and including one or more light emitters; and
an LED protective lens array including a plurality of protective lenses, overlaying the pcb board and over the one or more light emitters;
wherein the LED protective lens array is configured to be secured to the pcb board such that the protective lenses overlay the one or more light emitters, and such that a mechanical seal that disallows a flame from travelling into or out of at least one of the protective lenses when the mechanical seal is formed between each of the protective lenses of the LED protective lens array and the pcb board.

7. The luminaire system of claim 6 , wherein the pcb board is secured to the luminaire enclosure by mechanical fasteners.

8. The luminaire system of claim 6 , further comprising,
a clamp plate, overlaying the LED protective lens array;
wherein the LED protective lens array is secured to the pcb board by mechanical fasteners; and
wherein the clamp plate is secured to the protective lens array by the mechanical fasteners.

9. The luminaire system of claim 6 , wherein,
the luminaire enclosure includes a luminaire enclosure cover and a luminaire enclosure backing;
wherein the luminaire enclosure cover includes a lens accommodating window having an outer bezel lip and an inner bezel lip; and
wherein the luminaire lens is retained between the outer bezel lip and the inner bezel lip of the lens accommodating window.

10. The luminaire system of claim 6 , wherein the luminaire enclosure further comprises a heatsink in thermal communication with the pcb board.

11. The luminaire system of claim 6 , wherein the LED protective lens array is configured to be secured over a pcb board by an adhesive that forms the mechanical seal.

12. The luminaire system of claim 11 , wherein the adhesive is a cement.

13. The luminaire system of claim 6 , wherein:
a flame protected lens is disposed in a luminaire enclosure cover of the luminaire enclosure, the flame protected lens includes a first lens surface and a second lens surface opposite to the first lens surface;
a luminaire enclosure backing of the luminaire enclosure includes a first surface and a recessed portion that has a mounting surface for the pcb board, wherein the mounting surface is recessed relative to the first surface; and
the first lens surface is sealingly connected to the enclosure cover and the second lens surface faces the mounting surface and the pcb board;
wherein a luminaire cavity is defined within the luminaire enclosure between the protective lens array and the luminaire lens, the luminaire cavity is formed between the mounting surface and the second lens surface; and
wherein the second lens surface is flush with the first surface such that the depth of the recessed portion is substantially equal to the height of the luminaire cavity.

14. A flame protected luminaire enclosure comprising:
a luminaire enclosure cover including a luminaire lens with a first lens surface;
an LED protective lens array including a plurality of protective lenses;
a luminaire enclosure backing with a first backing surface and a second backing surface spaced apart from the first backing surface, wherein the first lens surface is configured to be coupled to the first backing surface;
a luminaire cavity defined by a space extending between the first lens surface and the second backing surface;
wherein the size of the luminaire cavity is determined based on a flame encapsulating protective standard for enclosures; and
wherein the LED protective lens array is configured to be secured to the luminaire enclosure backing over a pcb board by an adhesive such that the LED protective lenses form a mechanical seal against the pcb board that disallows a flame from travelling into or out of at least one protective lens of the LED protective lens array.

15. The flame protected luminaire enclosure of claim 14 , further comprising a gasket disposed between the luminaire enclosure cover and the luminaire enclosure backing, wherein the gasket is disposed radially outside of an outer perimeter of the luminaire lens.

16. The flame protected luminaire enclosure of claim 14 , wherein the adhesive is cement.

17. The flame protected luminaire enclosure of claim 14 , wherein the mechanical seal is configured to seal around a perimeter of each lens of the plurality of protective lenses.

18. The flame protected luminaire enclosure of claim 14 , wherein the luminaire enclosure cover includes a fastener accommodating aperture, and wherein the luminaire enclosure backing is configured to be joined to the luminaire enclosure cover by an enclosure fastener.

19. The flame protected luminaire enclosure of claim 14 , wherein each protective lens includes a plurality of inner walls forming tiered, concentric, conical cavities of differing slopes, diameters, and heights.

20. The flame protected luminaire enclosure of claim 14 , further including a hollow compartment disposed on a backside of the luminaire enclosure backing, and wherein the hollow compartment further includes mounting equipment configured to mount the luminaire enclosure backing to a surface.

Assignees

• Hubbell Inc

Inventors

• Dachlan Ivon
• Camillo Paolo

Classifications

• F21V19/003

  Fastening of light source holders, e.g. of circuit boards or substrates holding light sources · CPC title

• F21V17/10

  characterised by specific fastening means or way of fastening (F21V17/02 - F21V17/08 take precedence) · CPC title

• F21V15/01

  Housings, e.g. material or assembling of housing parts (F21V15/02 takes precedence {housings forming signs or letters G09F13/04}) · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21V29/70

  characterised by passive heat-dissipating elements, e.g. heat-sinks · CPC title