# US 12,000,562 B2 · Lighting assembly with AC to DC converter and heat-sinking housing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,000,562 B2 - Document ID: US12000562B2 - Status: Granted - Kind: B2 - Application number: 17/826,847 - Filed: 2022-05-27 - Published: 2023-09-07 - Granted: 2024-06-04 - Earliest claimed: 2013-07-05 - Assignees: DMF, Inc. - Applicants: DMF, Inc. - Inventors: Michael D. Danesh - Web page: https://patentgrep.com/patent/US12000562B2 ## CPC - F21S 8/02: of recess-mounted type, e.g. downlighters (specially adapted for vehicle exteriors F21S41/00-F21S45/00) - F21S 8/026: {intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling} - F21V 7/041: {with conical or pyramidal surface} - F21V 23/006: {the substrate being distinct from the light source holder} - H04R 17/00: Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners {H10N30/00}) - H04R 23/02: Transducers using more than one principle simultaneously - F21Y 2115/10: Light-emitting diodes [LED] - H04R 1/24: Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges - H04R 2499/11: Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's - 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 - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) - 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 lighting assembly includes a heat-sinking housing, a lens, a light source module including at least one LED, and an AC to DC converter to receive an AC voltage and supply regulated electrical energy to power the light source module. The housing includes a closed rear wall and a sidewall that defines a housing cavity containing the at least one LED. The closed rear wall and the sidewall are formed of a heat conductive material to conduct heat generated by the light source module. The assembly has a front end face, and at least one exterior width dimension of less than 3½ inches. In one example, a circular recess defined along an inner edge of the front end face contains the lens in the assembly. In another example, the front face includes a tool-less mating mechanism, for example a twist-and-lock mechanism comprising multiple flanges and/or slots. ## Claims ### Claim 1 A recessed lighting system, comprising: a lighting assembly, comprising: a light source module including at least one LED; an AC to DC converter to receive an AC voltage of one of approximately 120 VAC or approximately 277 VAC and supply regulated electrical energy to power the light source module; a heat-sinking housing comprising a plurality of heat sink fins, a closed rear wall, and a sidewall joined to the closed rear wall and extending 360 degrees around the central axis of the heat-sinking housing to define a housing cavity that extends forward from the closed rear wall and outward to the sidewall, the closed rear wall and the sidewall being formed of a heat conductive material to conduct heat generated by the light source module, the AC to DC converter being physically coupled to the heat-sinking housing using a connecting mechanism and insulated from the heat-sinking housing; a plurality of electrical wires coupled to the AC to DC converter and passing through the closed rear wall of the heat-sinking housing; and a front end face, wherein: the sidewall of the heat-sinking housing is coupled to the front end face; the light source module is positioned inside the housing cavity closer to the closed rear wall than to a forward surface of the front end face; the front end face further comprises a tool-less mating mechanism to facilitate coupling with a trim; and an outside width of the lighting assembly is less than 3½ inches and fits between multiple tabs of a standard junction box. ### Claim 2 (depends on 1) The lighting system of claim 1, further comprising the trim coupled to the front end face of the lighting assembly via the tool-less mating mechanism. ### Claim 3 (depends on 2) The lighting system of claim 2, wherein the trim includes clips adapted to couple the trim to a junction box. ### Claim 4 (depends on 1) The lighting system of claim 1, wherein the lighting assembly is adapted to be installed in a junction box that allows a ceiling to maintain a fire rating of up to two hours as described in the National Electric Code. ### Claim 5 (depends on 1) The lighting system of claim 1, wherein the closed rear wall and the sidewall of the lighting assembly are formed of aluminum. ### Claim 6 (depends on 1) The lighting system of claim 1, wherein: the light source module directly contacts the heat-sinking housing; and the light source module does not directly contact the AC to DC converter. ### Claim 7 (depends on 1) The lighting system of claim 1, wherein the lighting assembly further comprises: a lens positioned to direct light produced by the light source module out into an area surrounding the recessed lighting system; and a circular recess defined along an inner edge of the front end face to contain the lens. ### Claim 8 (depends on 7) The lighting system of claim 7, wherein at least a portion of a front surface of the lens and the forward surface of the front end face define a nearly planar front surface for the lighting assembly. ### Claim 9 (depends on 1) The lighting system of claim 1, wherein the AC to DC converter includes a circuit board contained in the housing cavity of the lighting assembly. ### Claim 10 (depends on 1) The lighting system of claim 1, further comprising an enclosure to contain the lighting assembly, wherein the enclosure comprises one of a standard junction box or a 4-10 inch recessed lighting fixture.