# US 11,029,015 B1 · Submersible light fixture with multilayer stack for pressure transfer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,029,015 B1 - Document ID: US11029015B1 - Status: Granted - Kind: B1 - Application number: 16/278,689 - Filed: 2019-02-18 - Granted: 2021-06-08 - Earliest claimed: 2009-07-29 - Assignees: Seescan, Inc. - Applicants: Seescan, Inc. - Inventors: Mark S. Olsson; John R. Sanderson, IV; Jon E. Simmons; Brian P. Lakin; Steven B. Weston - Web page: https://patentgrep.com/patent/US11029015B1 ## CPC - F21V 31/005: {Sealing arrangements therefor} - F21V 3/04: characterised by materials, surface treatments or coatings - F21V 3/06: characterised by the material - F21V 5/04: of lens shape - F21V 7/00: Reflectors for light sources (characterised by cooling arrangements F21V29/505) - F21V 15/01: Housings, e.g. material or assembling of housing parts (F21V15/02 takes precedence {housings forming signs or letters G09F13/04}) - F21V 23/005: {the substrate is supporting also the light source} - F21V 23/0442: {activated by means of a sensor, e.g. motion or photodetectors} - F21V 23/06: the elements being coupling devices {, e.g. connectors} - F21V 29/507: of means for protecting lighting devices from damage, e.g. housings - F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks - F21V 21/30: Pivoted housings or frames - F21Y 2101/00: Point-like light sources - F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements - 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 underwater light or submersible luminaire may include a housing and a transparent pressure bearing window positioned at a forward end of the housing. A window supporting structure may be mounted in the housing behind the transparent window. A printed circuit board element having a plurality of LEDs may be positioned within the housing behind the window supporting structure to bear substantially all of the ambient water pressure applied to the transparent window. ## Claims ### Claim 1 A submersible light for high pressure underwater use, comprising: an at least partially cylindrical housing shaped and sized for withstanding ambient exterior pressure at a depth of approximately 500 feet or more; a transparent pressure bearing window positioned at a forward end of the housing having a thickness for bearing substantially all of the ambient exterior pressure at the depth of approximately 500 feet or more; a pressure bearing window supporting structure, including a multilayered stack of substantially flat spacers of a high compressive strength material, for bearing substantially all of the loading applied to the transparent pressure bearing window at the depth of approximately 500 feet or more, mounted in the housing behind the transparent pressure bearing window; a water-tight seal between the transparent pressure bearing window and the housing; a circuit element configured and positioned within the housing behind the window supporting structure to bear substantially all of the pressure applied to the transparent pressure bearing window by ambient water on an exterior side of the window; and at least one solid state light source comprising a plurality of LEDs mounted on the circuit element behind the transparent bearing window; wherein the multilayer stack includes a window support spacer and an LED spacer positioned between the transparent pressure bearing window and the circuit element. ### Claim 2 (depends on 1) The light of claim 1, wherein the circuit element is a metal core printed circuit board (MCPCB). ### Claim 3 (depends on 2) The light of claim 2, wherein the MCPCB comprises copper. ### Claim 4 (depends on 2) The light of claim 2, wherein the MCPCB comprises aluminum. ### Claim 5 (depends on 1) The light of claim 1, further including thermal sensor electronics including a temperature sensor for measuring temperature and automatically reducing current applied to the solid state light source when a predetermined temperature is reached. ### Claim 6 (depends on 1) The light of claim 1, wherein the multilayer stack further comprises a window retainer assembly positioned to retain the transparent pressure bearing window relative to the housing. ### Claim 7 (depends on 1) The light of claim 1, wherein the multilayer stack further comprises a Kapton sheet disposed between the LED spacer and transparent pressure bearing window. ### Claim 8 (depends on 1) The light of claim 1, wherein the LEDs include silicone domes and wherein the silicone domes are trimmed to a width equal to or less than a width of the window support spacer. ### Claim 9 (depends on 1) The light of claim 1, further comprising one or more reflectors positioned around one or more of the plurality of LEDs. ### Claim 10 (depends on 9) The light of claim 9, further comprising one or more lenses positioned around one or more of the plurality of LEDs. ### Claim 11 (depends on 1) The light of claim 1, wherein the multilayer stack further comprises a window retainer assembly positioned to retain the transparent pressure bearing window relative to the housing. ### Claim 12 (depends on 1) The light of claim 1, wherein the multilayer stack further comprises a Kapton sheet disposed between the LED spacer and transparent pressure bearing window. ### Claim 13 (depends on 1) The light of claim 1, further comprising an underwater electrical connector disposed at or near a rearward end of the housing.