# US 2022/0397248 A1 · Fire rated canless recessed luminaire > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0397248 A1 - Document ID: US20220397248A1 - Status: Published application - Kind: A1 - Application number: 17/642,866 - Filed: 2020-09-16 - Published: 2022-12-15 - Earliest claimed: 2019-09-16 - Assignees: Progress Lighting, LLC - Applicants: Hubbell Incorporated - Inventors: Anthony Sinphay; Dhavalkumar Patel; William Thomas - Web page: https://patentgrep.com/patent/US20220397248A1 ## CPC - F21S 8/026: {intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling} - E04B 9/006: {with means for hanging lighting fixtures or other appliances to the framework of the ceiling} - F21V 23/007: {enclosed in a casing} - F21V 25/125: {using intumescent material, i.e. using materials which swells up as a result of heat exposure} - F21Y 2115/10: Light-emitting diodes [LED] - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001}) - 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 recessed luminaire includes a housing supporting a light emitter, an intumescent material coupled to an outer surface of the housing, and a plate coupled to the housing and to the intumescent material. The housing configured to be positioned at least partially through a ceiling. The housing also includes a stepped surface. The intumescent material has a shape complementary to a shape of the housing. The plate is positioned adjacent to the stepped surface and to an upper surface of the intumescent material. ## Claims ### Claim 1 A recessed luminaire comprising: a housing supporting a light emitter and configured to be positioned at least partially through a ceiling, the housing including a stepped surface; an intumescent material coupled to an outer surface of the housing and having a shape complementary to a shape of the housing; and a plate coupled to the housing and to the intumescent material, the plate positioned adjacent to the stepped surface and to an upper surface of the intumescent material. ### Claim 2 (depends on 1) The recessed luminaire of claim 1, wherein the intumescent material includes an aperture configured to receive a fastener, the fastener configured to secure the plate to the intumescent material. ### Claim 3 (depends on 1) The recessed luminaire of claim 1, wherein the housing is a lower housing and the intumescent material is a first intumescent material, the luminaire further comprising, an upper housing coupled to the lower housing and configured to be positioned within a ceiling, the upper housing configured to support a driver electrically connected to the light emitter; and a second intumescent material positioned within the upper housing, the second intumescent material proximate the lower housing. ### Claim 4 (depends on 3) The recessed luminaire of claim 3, wherein the first intumescent material and the second intumescent material include the same composition. ### Claim 5 (depends on 1) The recessed luminaire of claim 1, wherein the intumescent material and the plate have a circular shape, each with an inner diameter and an outer diameter. ### Claim 6 (depends on 1) The recessed luminaire of claim 1, wherein the intumescent material includes a lip proximate to the stepped surface. ### Claim 7 A recessed luminaire comprising: an upper housing configured to house a driver; a lower housing coupled to the upper housing, the lower housing including a light emitter coupled to the driver and a reflector; a first intumescent material coupled to the lower housing and positioned radially outside of an outer surface of the reflector; and a second intumescent material positioned between the upper housing and the lower housing. ### Claim 8 (depends on 7) The recessed luminaire of claim 7, wherein the first intumescent material and the second intumescent material include the same composition. ### Claim 9 (depends on 7) The recessed luminaire of claim 7, further comprising a plate coupled to a stepped surface of the lower housing, the plate extending radially beyond the stepped surface and coupled to the first intumescent material. ### Claim 10 (depends on 9) The recessed luminaire of claim 9, wherein the intumescent material includes an aperture configured to receive a fastener, the fastener configured to secure the plate to the intumescent material. ### Claim 11 (depends on 7) The recessed luminaire of claim 7, wherein a width of the second intumescent material is less than an inner diameter of the first intumescent material. ### Claim 12 A luminaire for attaching through an aperture in a ceiling or wall of a structure comprising: a first housing having a first diameter smaller than the aperture and including a light emitter; a first intumescent material positioned radially outside of an outer surface of said first housing; a second housing having a second diameter smaller than said first diameter and coupled to a top surface of said first housing; and a second intumescent material coupled to said second housing proximate said top surface of said first housing. ### Claim 13 (depends on 12) The luminaire claimed in claim 12 further comprising: an attachment mechanism coupled to one or more of said first and second housings for retaining the luminaire within the aperture. ### Claim 14 (depends on 12) The luminaire claimed in claim 12 wherein said first intumescent material is shaped substantially similar to a shape of the aperture. ### Claim 15 (depends on 14) The luminaire claimed in claim 14 wherein said second intumescent material is shaped substantially similar to a shape of the outside diameter of said second housing. ### Claim 16 (depends on 13) The luminaire claimed in claim 13 further comprising: a reflector coupled to said first housing and disposed between said light emitter and the aperture; and a lens coupled to said first housing and disposed within an inner diameter of said first intumescent material. ### Claim 17 (depends on 16) The luminaire claimed in claim 16 wherein said first housing includes a lip portion that extends beyond a circumference of the aperture. ### Claim 18 (depends on 17) The luminaire claimed in claim 17 wherein said attachment mechanism includes one or more spring-biased wing portions that contact a first surface of the wall or ceiling and said lip portion contacts a second surface of the wall or ceiling to retain the luminaire within the aperture. ### Claim 19 (depends on 12) The luminaire claimed in claim 12 wherein said second housing includes a lid portion on a surface opposite said first housing, wherein said lid portions provides access to an interior area of said second housing. ### Claim 20 (depends on 19) The luminaire claimed in claim 19 further comprising a driver disposed within said second housing and electrically connected to said light emitter.