# US 8,540,402 B2 · LED housing with heat transfer sink > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,402 B2 - Document ID: US8540402B2 - Status: Granted - Kind: B2 - Application number: 13/112,482 - Filed: 2011-05-20 - Published: 2011-11-24 - Granted: 2013-09-24 - Earliest claimed: 2010-05-23 - Assignees: RAB Lighting Inc. - Applicants: Vincenzo Guercio; Jun Xiang - Inventors: Vincenzo Guercio; Jun Xiang - Web page: https://patentgrep.com/patent/US8540402B2 ## CPC - F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks - F21V 29/507: of means for protecting lighting devices from damage, e.g. housings - F21Y 2115/10: Light-emitting diodes [LED] - 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 An illustrative thermally managed light includes a light source, for example an LED array, a heatsink having a tapered outer surface, the light source thermally coupled with the heatsink, a housing having a tapered interior surface portion, and a securing device coupling the heatsink and the rear end of the housing. The securing device, for example a tensioning device, adapted to retain the outer surface of the heatsink in thermal contact with the tapered interior surface of the housing, thus transferring and dissipating the heat from the light source into the environment around the housing. ## Claims ### Claim 1 A thermally managed light, comprising: a light source; a heatsink having a tapered outer surface, the light source thermally coupled with the heatsink; a housing having an interior surface, at least a portion of the interior surface tapered to receive the tapered outer surface of the heatsink; and a coupling device securing the heatsink with the housing such that the tapered outer surface of the heatsink is thermally coupled with the tapered interior surface of the housing. ### Claim 2 (depends on 1) The thermally managed light of claim 1, wherein the coupling device secures the outer surface of the heatsink in direct mechanical contact with the tapered portion of the interior surface. ### Claim 3 (depends on 2) A thermally managed light of claim 2, further comprising a thermal grease between the outer surface of the heatsink and the tapered portion of the interior surface. ### Claim 4 (depends on 2) The thermally managed light of claim 2, wherein the coupling device tensions the heatsink to draw the outer surface in thermal contact with the tapered portion of the interior surface. ### Claim 5 (depends on 2) The thermally managed light of claim 2, wherein the coupling device includes a bracket and a fastener coupled between the heatsink and a rear portion of the housing, the fastener accessible from outside the housing. ### Claim 6 (depends on 2) The thermally managed light of claim 2, wherein the coupling device includes a fastener connecting the heatsink to the housing. ### Claim 7 (depends on 2) The thermally managed light of claim 2, wherein the fastener is secured through a hole defined in the heatsink and anchors to a feature of the housing. ### Claim 8 (depends on 1) The thermally managed light of claim 1, wherein the heatsink defines an interior web and an outer annulus, the annulus defining the outer surface having a depth greater than the thickness of the interior web. ### Claim 9 (depends on 1) The thermally managed light of claim 1, wherein the heatsink defines a planar front surface to which the light source is thermally coupled. ### Claim 10 (depends on 1) The thermally managed light of claim 1, further comprising a light reflector and standoffs, and wherein the standoffs at least in part position the reflector relative to the heatsink. ### Claim 11 (depends on 1) The thermally managed light of claim 1, wherein the heatsink is disk-shaped. ### Claim 12 (depends on 1) The thermally managed light of claim 1, wherein the tapered outer surface of the heatsink and the tapered portion of the interior surface of the housing define matching conical surfaces. ### Claim 13 (depends on 1) The thermally managed light of claim 1, wherein: the housing defines a front opening for receiving the light source and the heatsink; and, the tapers of the outer surface of the heatsink and the portion of the interior surface of the house define a larger diameter toward the light source. ### Claim 14 (depends on 1) The thermally managed light of claim 1, wherein the housing encloses the heatsink. ### Claim 15 (depends on 1) The thermally managed light of claim 1, further comprising an LED driver, and wherein the LED driver is thermally isolated from the light source. ### Claim 16 (depends on 15) The thermally managed light of claim 15, further comprising standoffs, the standoffs at least in part positioning the heatsink relative to the LED driver to define an open space between the two. ### Claim 17 (depends on 16) The thermally managed light of claim 16, further comprising a plate to which the LED driver is coupled, the standoffs coupling the plate and heatsink on a side of the heatsink opposite the light source. ### Claim 18 (depends on 17) The thermally managed light of claim 17, wherein the plate comprises a thermally insulating material. ### Claim 19 A thermally managed light, comprising: an LED; a disk-shaped heatsink having a conical outer surface, the LED thermally coupled with the heatsink; a housing having an interior surface, at least a portion of the interior surface shaped to receive and match the conical outer surface of the heatsink; and a coupling device securing the heatsink with the housing such that the conical outer surface of the heatsink is thermally coupled with the interior surface of the housing. ### Claim 20 A thermally managed light, comprising: a light source; a heatsink having a tapered outer surface, the light source thermally coupled with the heatsink; a housing having an interior surface, at least a portion of the interior surface tapered to receive the tapered outer surface of the heatsink; and a coupling device securing the heatsink with the housing such that the tapered outer surface of the heatsink is in direct mechanical and thermal contact with the tapered interior surface of the housing, the coupling device including a bracket and a fastener coupled between the heatsink and a rear portion of the housing, the fastener accessible from outside the housing.