# US 2019/0170341 A1 · Controlled environment light fixture > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170341 A1 - Document ID: US20190170341A1 - Status: Published application - Kind: A1 - Application number: 16/148,970 - Filed: 2018-10-01 - Published: 2019-06-06 - Earliest claimed: 2014-05-13 - Assignees: Autronic Plastics, Inc. - Applicants: Clear-Vu Lighting LLC - Inventors: Daniel A. Lax; George B. Ryder; Agjah I. Libohova - Web page: https://patentgrep.com/patent/US20190170341A1 ## CPC - F21V 31/005: {Sealing arrangements therefor} - F21S 8/026: {intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling} - F21V 3/04: characterised by materials, surface treatments or coatings - F21V 5/08: producing an asymmetric light distribution - F21V 15/01: Housings, e.g. material or assembling of housing parts (F21V15/02 takes precedence {housings forming signs or letters G09F13/04}) - F21V 15/013: {the housing being an extrusion} - F21V 17/12: by screwing - F21V 19/005: {by permanent fixing means, e.g. gluing, riveting or embedding in a potting compound} - F21V 21/043: {actuated by screwing} - F21V 21/047: {Mounting arrangements with fastening means engaging the inner surface of a hole in a ceiling or wall, e.g. for solid walls or for blind holes} - F21V 21/048: {Mounting arrangements for fastening lighting devices to false ceiling frameworks} - F21V 21/30: Pivoted housings or frames - F21V 23/009: {the casing being inside the housing of the lighting device} - F21V 29/507: of means for protecting lighting devices from damage, e.g. housings - F21V 29/74: with fins or blades - F21V 29/763: {the planes containing the fins or blades having the direction of the light emitting axis} - F21V 29/89: Metals - G02B 6/00: Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings - G02B 6/0011: {the light guides being planar or of plate-like form} - G02B 6/0051: {Diffusing sheet or layer} - G02B 6/0073: {Light emitting diode [LED]} - G02B 6/0086: {Positioning aspects} - G02B 6/0095: {Light guides as housings, housing portions, shelves, doors, tiles, windows, or the like} - F21W 2131/205: for operating theatres - F21Y 2105/00: Planar light sources - F21Y 2115/10: Light-emitting diodes [LED] - G02B 6/0081: {Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging} - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED ## Abstract Controlled environment light fixture configurations include an LED light source. The light fixtures can be installed and removed from below the ceiling. The light fixture can be installed and removed without opening the lens frame of the light fixture. The light fixture includes a sealed housing and seals to the ceiling when installed. The light fixtures are provided in exterior dimension sizes that allow the fixtures to be installed in a variety of controlled environment ceilings in recessed configurations. The lower surface exposed to the controlled environment is free of welds and grinds in order to provide a corrosion resistant surface. ## Claims ### Claim at position 1 1-20. (canceled) ### Claim 21 A light fixture for a controlled environment ceiling application, the light fixture comprising: an enclosure that includes an aluminum housing and a lens frame; an LED light source carried by the enclosure; the LED light source being mounted directly to the aluminum housing such that the housing functions as a conductive heat sink for the LED circuit board. ### Claim 22 (depends on 21) The light fixture of claim 21, wherein the aluminum housing includes an integral aluminum LED mount that defines a substantially vertical surface when the light fixture is mounted in the ceiling; the LED light source being mounted to the substantially vertical surface of the integral aluminum LED mount. ### Claim 23 (depends on 22) The light fixture of claim 22, wherein the aluminum housing defines a plurality of fins used to increase surface area of the housing to remove heat from the housing. ### Claim 24 (depends on 23) The light fixture of claim 23, wherein the housing includes an extruded aluminum envelope disposed between first and second aluminum end caps; the extruded aluminum envelope defining the plurality of fins. ### Claim 25 (depends on 24) The light fixture of claim 24, wherein the extruded aluminum envelope defines a plurality of channels; the end caps being secured to the envelope with threaded fasteners that engage the channels. ### Claim 26 (depends on 25) The light fixture of claim 25, wherein each of the end caps defines a slot; the envelope having first and second ends disposed in the slots of the ends caps; and a sealing material disposed in the slots between the envelope ends and the end caps. ### Claim 27 A light fixture for a controlled environment ceiling; the light fixture comprising: an enclosure having a lens frame sealed to a housing; the housing having a mounting surface adapted to engage the ceiling when the light fixture is installed; the housing having a height above the mounting surface of no more than two inches; and an LED light source disposed within the enclosure. ### Claim 28 (depends on 27) The light fixture of claim 27, further comprising an LED power supply carried within the enclosure and a light guide plate having a plurality of edges; the light guide plate being disposed above the lens frame of the enclosure; the LED light source being arranged to direct light into an edge of the light guide plate. ### Claim 29 (depends on 27) The light fixture of claim 27, wherein the lens frame includes a lens and wherein the LED light source is arranged to direct light in a direction substantially perpendicular to the lens of the lens frame. ### Claim 30 (depends on 27) The light fixture of claim 27, wherein the lens frame includes a lens and wherein the LED light source is arranged to direct light in a direction substantially parallel to the lens of the lens frame. ### Claim 31 (depends on 27) The light fixture of claim 27, wherein the mounting surface is an upwardly-facing mounting surface adapted to be disposed below the ceiling when the light fixture is installed; and further comprising a gasket carried by the housing; the gasket having a first portion for sealing the housing to the ceiling when the light fixture is installed in the ceiling; the first portion of the gasket being disposed on the upwardly-facing mounting surface. ### Claim 32 A light fixture for a controlled environment ceiling; the light fixture comprising: an enclosure having a lens frame and a housing; the housing adapted to fit into one of a 1×2, 2×2, and 2×4 light opening defined by a 2.0″ T-bar grid ceiling; and an LED light source disposed within the enclosure. ### Claim 33 (depends on 32) The light fixture of claim 32, wherein the enclosure can be mounted to ceilings formed from other systems including gypsum and panel systems. ### Claim 34 (depends on 32) The light fixture of claim 32, further comprising an LED power supply carried within the enclosure and a light guide plate having a plurality of edges; the light guide plate being disposed above the lens frame of the enclosure; the LED light source being arranged to direct light into an edge of the light guide plate. ### Claim 35 (depends on 32) The light fixture of claim 32, wherein the lens frame includes a lens and wherein the LED light source is arranged to direct light in a direction substantially perpendicular to the lens of the lens frame. ### Claim 36 (depends on 32) The light fixture of claim 32, wherein the lens frame includes a lens and wherein the LED light source is arranged to direct light in a direction substantially parallel to the lens of the lens frame. ### Claim at position 18 37-51. (canceled) ### Claim 52 (depends on 21) The light fixture of claim 21, wherein the LED light source is a disinfecting LED light source. ### Claim 53 (depends on 27) The light fixture of claim 27, wherein the LED light source is a disinfecting LED light source. ### Claim 54 (depends on 32) The light fixture of claim 32, wherein the LED light source is a disinfecting LED light source. ### Claim 55 A disinfecting light fixture for a controlled environment ceiling; the light fixture comprising: an enclosure having a lens frame sealed to a housing; the housing having a mounting surface adapted to engage the ceiling when the light fixture is installed; the housing having a height above the mounting surface of no more than two inches; and a disinfecting LED light source disposed within the enclosure.