# US 9,752,735 B2 · Optically and thermally efficient high bay light fixture > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,735 B2 - Document ID: US9752735B2 - Status: Granted - Kind: B2 - Application number: 15/238,125 - Filed: 2016-08-16 - Published: 2017-02-23 - Granted: 2017-09-05 - Earliest claimed: 2015-08-21 - Assignees: Linmore LED Labs, Inc. - Applicants: Linmore Led Labs, Inc. - Inventors: Paul Chamberlain - Web page: https://patentgrep.com/patent/US9752735B2 ## CPC - F21K 9/275: Details of bases or housings, i.e. the parts between the light-generating element and the end caps; Arrangement of components within bases or housings (F21K9/278 takes precedence) - F21K 9/272: Details of end parts, i.e. the parts that connect the light source to a fitting; Arrangement of components within end parts (F21K9/278 takes precedence) - F21S 4/28: rigid, e.g. LED bars - F21S 8/04: intended only for mounting on a ceiling or the like overhead structures (F21S8/02 takes precedence; {details of ceiling bases F21V21/03}) - F21V 3/02: characterised by the shape - F21V 7/005: {with an elongated shape to cooperate with linear light sources} - F21V 7/06: with parabolic curvature - F21V 15/015: Devices for covering joints between adjacent lighting devices; End coverings - F21V 29/74: with fins or blades - F21V 29/83: the elements having apertures, ducts or channels, e.g. heat radiation holes - F21Y 2103/10: comprising a linear array of point-like light-generating elements - F21Y 2115/10: Light-emitting diodes [LED] - F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - 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 A heat dissipating and optically efficient LED high bay light bar which may be used as part of a complete retrofit system for a variety of linear fluorescent light fixtures. The LED high bay light bar comprises an elongate channel member which is preferably fabricated from extruded aluminum. In addition to the channel member, the LED high bay light bar comprises a high-efficacy set of LEDs, which are preferably provided in the form of an elongate LED printed circuit board (PCB) or strip mechanically bonded to the channel member. The channel member is outfitted with fins and other surface features uniquely configured to provide superior heat dissipation, thus allowing the channel member to effectively function as a heat sink for the LED strip cooperatively engaged thereto. The channel member is configured to define an air flow cavity under the LED strip as allows for the effective dissipation of heat during operation of the LED light bar. The channel member also includes a parabolic reflector portion which is itself uniquely configured to provide optimal light emission/distribution characteristics. ## Claims ### Claim 1 An LED high bay light bar, comprising: an elongate channel member defining: an elongate support portion which defines a first surface and an opposed second surface, at least a portion of the second surface having a serrated configuration of increased surface area; an identically configured pair of elongate coupling arm segments which at least partially overhang the first surface of the support portion; a generally parabolic reflector portion which protrudes from the first surface of the support portion; and an identically configured pair of elongate rail portions integrally connected to and extending along support portion in opposed relation to each other, each of the rail portions defining a heat sink arm segment having an exteriorly presented serrated surface and a base arm segment which configured to be abutted against an underlying support surface; an LED strip attached to and the channel member and extending along at least portion of the first surface of support portion thereof, the LED strip being maintained in engagement to the support portion by the coupling arm segments; wherein the channel member is configured such that the second surface of the support portion is separated from the base arm segments of the rail portions by a distance sufficient to facilitate the formation of a heat dissipating airflow cavity between the second surface and the support surface when the base arm segments are abutted against the support surface, and the reflector portion is configured optimize light distribution. ### Claim 2 (depends on 1) The LED high bay light bar of claim 1 wherein the reflector portion comprises an identically configured pair of arcuate side sections which protrude from the first surface of the support portion in opposed relation to each other, each of the side sections defining a generally concave interior surface, with the interior surfaces being sized and configured that light emitted from the LED strip will bounce therefrom no more than once prior to exiting the reflector portion. ### Claim 3 (depends on 2) The LED high bay light bar of claim 2 further comprising a sheet like reflective insert applied to the interior surface of each of the side sections of the reflector portion. ### Claim 4 (depends on 2) The LED high bay light bar of claim 2 further comprising a diffuser cooperatively engaged to the reflector portion in a manner effectively covering the LED strip. ### Claim 5 (depends on 1) The LED high bay light bar of claim 1 further comprising an identically configured pair of end caps attached to respective ones of an opposed pair of ends defined by the channel member. ### Claim 6 (depends on 5) The LED high bay light bar of claim 5 wherein each of the end caps defines an attachment tab portion adapted to facilitate the attached of the LED high bay light bar to the support surface. ### Claim 7 An LED high bay light bar, comprising: an elongate channel member defining: an elongate support portion which defines a first surface and an opposed second surface, at least a portion of the second surface having a serrated configuration of increased surface area; a reflector portion which protrudes from the first surface of the support portion and includes an identically configured pair of arcuate side sections which protrude from the first surface of the support portion in opposed relation to each other, each of the side sections defining a generally concave interior surface; and an identically configured pair of elongate rail portions integrally connected to and extending along support portion in opposed relation to each other, each of the rail portions defining a heat sink arm segment having an exteriorly presented serrated surface and a base arm segment which configured to be abutted against an underlying support surface; an LED strip attached to and the channel member and extending along at least portion of the first surface of support portion thereof; wherein the channel member is configured such that the second surface of the support portion is separated from the base arm segments of the rail portions by a distance sufficient to facilitate the formation of a heat dissipating air flow cavity between the second surface and the support surface when the base arm segments are abutted against the support surface, and the interior surfaces of the reflector portion are sized and configured such that light emitted from the LED strip will bounce therefrom no more than once prior to exiting the reflector portion so as to optimize light distribution therefrom. ### Claim 8 (depends on 7) The LED high bay light bar of claim 7 wherein the channel member further comprises an identically configured pair of elongate coupling arm segments which at least partially overhang the first surface of the support portion, the LED strip being maintained in engagement to the support portion by the coupling arm segments. ### Claim 9 (depends on 7) The LED high bay light bar of claim 7 further comprising a sheet like reflective insert applied to the interior surface of each of the side sections of the reflector portion. ### Claim 10 (depends on 7) The LED high bay light bar of claim 7 further comprising a diffuser cooperatively engaged to the reflector portion in a manner effectively covering the LED strip. ### Claim 11 (depends on 7) The LED high bay light bar of claim 7 further comprising an identically configured pair of end caps attached to respective ones of an opposed pair of ends defined by the channel member. ### Claim 12 (depends on 11) The LED high bay light bar of claim 11 wherein each of the end caps defines an attachment tab portion adapted to facilitate the attached of the LED high bay light bar to the support surface. ### Claim 13 An LED high bay light bar, comprising: an elongate channel member defining: an elongate support portion which defines a first surface and an opposed second surface; a reflector portion which protrudes from the first surface of the support portion and includes an identically configured pair of arcuate side sections which protrude from the first surface of the support portion in opposed relation to each other, each of the side sections defining a generally concave interior surface; and an identically configured pair of elongate rail portions connected to and extending along support portion in opposed relation to each other, each of the rail portions defining a heat sink arm segment having an exteriorly presented surface and a base arm segment which configured to be abutted against an underlying support surface; an LED strip attached to and the channel member and extending along at least portion of the first surface of support portion thereof; wherein the channel member is configured such that the second surface of the support portion is separated from the base arm segments of the rail portions by a distance sufficient to facilitate the formation of a heat dissipating air flow cavity between the second surface and the support surface when the base arm segments are abutted against the support surface, and the interior surfaces of the reflector portion are sized and configured such that light emitted from the LED strip will bounce therefrom no more than once prior to exiting the reflector portion so as to optimize light distribution therefrom. ### Claim 14 (depends on 13) The LED high bay light bar of claim 13 wherein the channel member further comprises an identically configured pair of elongate coupling arm segments which at least partially overhang the first surface of the support portion, the LED strip being maintained in engagement to the support portion by the coupling arm segments. ### Claim 15 (depends on 13) The LED high bay light bar of claim 13 further comprising a sheet like reflective insert applied to the interior surface of each of the side sections of the reflector portion. ### Claim 16 (depends on 13) The LED high bay light bar of claim 13 further comprising a diffuser cooperatively engaged to the reflector portion in a manner effectively covering the LED strip. ### Claim 17 (depends on 13) The LED high bay light bar of claim 13 further comprising an identically configured pair of end caps attached to respective ones of an opposed pair of ends defined by the channel member. ### Claim 18 (depends on 17) The LED high bay light bar of claim 17 wherein each of the end caps defines an attachment tab portion adapted to facilitate the attached of the LED high bay light bar to the support surface. ### Claim 19 (depends on 13) The LED high bay light bar of claim 13 wherein at least a portion of the second surface of the support portion has a serrated configuration of increased surface area. ### Claim 20 (depends on 13) The LED high bay light bar of claim 13 wherein the exteriorly presented surface of the heat sink arm segment of each of the rail portions is at least partially serrated.