# US 10,480,722 B2 · Retrofit lamp > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,480,722 B2 - Document ID: US10480722B2 - Status: Granted - Kind: B2 - Application number: 15/451,762 - Filed: 2017-03-07 - Published: 2017-09-07 - Granted: 2019-11-19 - Earliest claimed: 2016-03-07 - Assignees: Ledvance GmbH - Applicants: OSRAM GmbH - Inventors: Lambert Frye; Klaus Eckert; Isabell Sklorz - Web page: https://patentgrep.com/patent/US10480722B2 ## CPC - F21K 9/237: Details of housings or cases, i.e. the parts between the light-generating element and the bases; Arrangement of components within housings or cases (F21K9/238 takes precedence) - F21K 9/232: specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb - F21K 9/238: Arrangement or mounting of circuit elements integrated in the light source - F21K 9/69: Details of refractors forming part of the light source - F21K 9/90: Methods of manufacture - F21V 5/04: of lens shape - F21V 5/10: comprising photoluminescent material - F21V 19/003: {Fastening of light source holders, e.g. of circuit boards or substrates holding light sources} - F21V 19/004: {by deformation of parts or snap action mountings, e.g. using clips} - F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks - F21K 9/235: Details of bases or caps, i.e. the parts that connect the light source to a fitting; Arrangement of components within bases or caps (F21K9/238 takes precedence) - F21V 17/16: by deformation of parts; Snap action mounting - F21V 29/89: Metals - F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements - F21Y 2115/10: Light-emitting diodes [LED] - Y02B 20/30: Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED] - 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 - 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 - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract A retrofit lamp comprises a heat sink, a light source module with a circuit board, whose rear side lies two-dimensionally on the heat sink and at the front side of which at least one semiconductor light source is arranged, and a ring partially covering the front side of the light source module, wherein the ring presses the light source module onto the heat sink. A method serves for producing a retrofit lamp, wherein the rear side of the circuit board of the light source module is laid on the heat sink and the ring is put on the retrofit lamp from the front such that it presses the light source module onto the heat sink. The invention is particularly applicable to LED retrofit lamps for replacing conventional light bulbs or halogen lamps. ## Claims ### Claim 1 A retrofit lamp comprising: a heat sink; a light source module comprising a circuit board, wherein: a rear side of the light source module lies two-dimensionally on the heat sink; and at a front side of the light source module, at least one semiconductor light source is arranged; and a ring partially covering the front side of the light source module, wherein the ring comprises a plurality of elastically flexible pressing tabs arranged at a periphery of the ring and configured to rest on the front side of the light source module and press the light source module onto the heat sink, wherein at least one of the elastically flexible pressing tabs, at a side thereof facing the light source module, comprises at least one projection resting on the front side of the light source module, and wherein the at least one projection extends generally perpendicularly from the at least one of the elastically flexible pressing tabs associated therewith. ### Claim 2 (depends on 1) The retrofit lamp according to claim 1, wherein the ring is locked with the heat sink. ### Claim 3 (depends on 1) The retrofit lamp according to claim 1, wherein at least one of the elastically flexible pressing tabs extends radially inward from the periphery of the ring. ### Claim 4 (depends on 1) The retrofit lamp according to claim 1, wherein the plurality of elastically flexible pressing tabs are uniformly arranged in an angle-offset manner in a circumferential direction around the periphery of the ring. ### Claim 5 (depends on 1) The retrofit lamp according to claim 1, wherein the ring has a vertical sidewall to which the plurality of elastically flexible pressing tabs are joined protruding inwards at a front of the ring. ### Claim 6 (depends on 1) The retrofit lamp according to claim 1, wherein the ring is comprised of a fiber-reinforced plastic. ### Claim 7 (depends on 1) The retrofit lamp according to claim 1, wherein the ring is configured for locking with at least one optical element. ### Claim 8 (depends on 1) The retrofit lamp according to claim 1, wherein the light source module is connected with the heat sink without an adhesive. ### Claim 9 (depends on 1) A method for producing a retrofit lamp according to claim 1, wherein: the rear side of the light source module is laid on the heat sink; and then the ring is put on the retrofit lamp from a front thereof such that the ring presses the light source module onto the heat sink. ### Claim 10 (depends on 1) The retrofit lamp according to claim 1, wherein at least one of the elastically flexible pressing tabs is bendable in a manner that generates an elastic restoring force that effectuates a pressing force that presses the light source module onto the heat sink. ### Claim 11 (depends on 10) The retrofit lamp according to claim 10, wherein bending of the at least one of the elastically flexible pressing tabs is achieved in physically interfacing the ring with the heat sink. ### Claim 12 (depends on 1) The retrofit lamp according to claim 1, further comprising a plurality of fastening tabs arranged at the periphery of the ring and configured to engage at least one optical element. ### Claim 13 (depends on 12) The retrofit lamp according to claim 12, wherein the plurality of fastening tabs are alternatingly arranged with the plurality of elastically flexible pressing tabs at the periphery of the ring. ### Claim 14 (depends on 12) The retrofit lamp according to claim 12, wherein the plurality of fastening tabs and the plurality of elastically flexible pressing tabs are arranged symmetrically about a central axis of the ring. ### Claim 15 (depends on 1) The retrofit lamp according to claim 1, wherein for at least one of the elastically flexible pressing tabs: a first end thereof is configured to interface with the light source module; and a second end thereof is configured to interface with the heat sink. ### Claim 16 (depends on 1) The retrofit lamp according to claim 1, wherein the ring is configured to laterally surround the light source module. ### Claim 17 A retrofit lamp comprising: a heat sink; a light source module comprising a circuit board, wherein: a rear side of the light source module lies two-dimensionally on the heat sink; and at a front side of the light source module, at least one semiconductor light source is arranged; and a ring partially covering the front side of the light source module, wherein the ring comprises a plurality of elastically flexible pressing tabs arranged at a periphery of the ring and configured to rest on the front side of the light source module and press the light source module onto the heat sink, wherein at least one of the elastically flexible pressing tabs, at a side thereof facing the light source module, comprises at least one projection resting on the front side of the light source module, and wherein the at least one projection is deflectable by a displacement distance in the range of about 0.3-1.0 mm. ### Claim 18 A retrofit lamp comprising: a heat sink; a light source module comprising a circuit board, wherein: a rear side of the light source module lies two-dimensionally on the heat sink; and at a front side of the light source module, at least one semiconductor light source is arranged; and a ring partially covering the front side of the light source module, wherein the ring comprises a plurality of elastically flexible pressing tabs arranged at a periphery of the ring and configured to rest on the front side of the light source module and press the light source module onto the heat sink, wherein at least one of the elastically flexible pressing tabs, at a side thereof facing the light source module, comprises at least one projection resting on the front side of the light source module, and wherein the at least one projection is a bead formed from the at least one of the elastically flexible pressing tabs associated therewith.