# US 8,540,399 B2 · Socket device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,399 B2 - Document ID: US8540399B2 - Status: Granted - Kind: B2 - Application number: 13/597,804 - Filed: 2012-08-29 - Published: 2012-12-20 - Granted: 2013-09-24 - Earliest claimed: 2008-11-28 - Assignees: Toshiba Lighting & Technology Corporation - Applicants: Satoshi Watanabe; Keiichi Shimizu; Takeshi Osada; Toshiya Tanaka; Shigeru Osawa; Takeshi Hisayasu; Hirokazu Otake; Hitoshi Kawano; Makoto Sakai - Inventors: Satoshi Watanabe; Keiichi Shimizu; Takeshi Osada; Keiichi Shimizu; Toshiya Tanaka; Shigeru Osawa; Takeshi Hisayasu; Hirokazu Otake; Hitoshi Kawano; Makoto Sakai - Web page: https://patentgrep.com/patent/US8540399B2 ## CPC - F21V 29/67: characterised by the arrangement of fans - F21K 9/20: Light sources comprising attachment means - F21V 19/001: {the light sources being semiconductors devices, e.g. LEDs} - F21V 29/73: the elements being adjustable with respect to each other, e.g. hinged - H01R 33/9456: {for bayonet type coupling devices} - F21V 19/006: {of point-like light sources, e.g. incandescent or halogen lamps, with screw-threaded or bayonet base (of sources having contact pins, wires or blades F21V19/0005; of LEDs or sources mounted on printed-circuit board F21V19/001)} - F21V 29/74: with fins or blades - F21Y 2115/10: Light-emitting diodes [LED] - Y10T 29/49879: Spaced wall tube or receptacle - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - 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 - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS - 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 - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A lighting fixture capable of efficiently radiating heat of a lamp device may be configured to be attached to a socket device. In some examples, by attaching the lamp device to the socket device, a cap portion of the lamp device is brought into contact with a fixture body, and pressed against and brought into close contact with the fixture body by an elastic body. Heat generated by lighting of LEDs of the lamp device is conducted from the cap portion to the fixture body and efficiently radiated. ## Claims ### Claim 1 A socket device comprising: a socket device body configured to receive a lamp device, the socket device body including a first wall positioned around an insertion through-hole configured to receive the lamp device in an insertion direction; and an elastic member configured to elastically urge the lamp device toward a direction in which a contact surface of the lamp device is to contact a heat radiating body and to be positioned around the contact surface of the lamp device when the lamp device is received in the socket device, wherein the elastic member is disposed exterior to the first wall in a direction orthogonal to the insertion direction and around the insertion through-hole. ### Claim 2 (depends on 1) The socket device of claim 1, wherein the socket device body further includes a second wall exterior to the first wall, wherein the elastic member is disposed interior to the second wall in the direction orthogonal to the insertion direction. ### Claim 3 (depends on 1) The socket device of claim 1, wherein the socket device body is configured to receive the lamp device from a first side of the insertion through-hole and to urge the contact surface of the lamp device toward a heat radiating body at a second side of the insertion through-hole. ### Claim 4 (depends on 1) The socket device of claim 1, wherein the elastic member is at least partially housed within the socket device body. ### Claim 5 A lighting system comprising: a lamp device including: an engagement portion configured to engage the lamp device with a socket device having an elastic member, wherein the lamp device is configured to be inserted into the socket device in an insertion direction; a lighting circuit on a first side of the lamp device; and a heat radiating member contact surface on a second side of the lamp device, wherein the engagement portion is configured to engage with a portion of the socket device such that the heat radiating member contact surface is surrounded by the socket device, and wherein engagement of the engagement portion with the portion of the socket device is configured to produce an elastic force urging the lamp device in the insertion direction; and the socket device, the socket device including: a socket device body including a first wall positioned around an insertion hole configured to receive the lamp device; and the elastic member, wherein the elastic member is configured to elastically urge the lamp device in the insertion direction and to be positioned around the heat radiating member contact surface of the lamp device when the lamp device is received in the socket device, wherein the elastic member is disposed exterior to the first wall in a direction orthogonal to the insertion direction and around the insertion hole. ### Claim 6 (depends on 5) The lighting system of claim 5, wherein the second side is opposite to the first side of the lamp device. ### Claim 7 (depends on 5) The lighting system of claim 5, wherein the engagement portion is configured to engage with a portion of the socket device such that the heat radiating member contact surface is surrounded by the elastic member of the socket device, wherein the elastic force is produced at least partially by the elastic member. ### Claim 8 (depends on 5) The lighting system of claim 5, wherein the engagement portion includes a protruding member. ### Claim 9 (depends on 5) The lighting system of claim 5, wherein the socket device body further includes a second wall exterior to the first wall, wherein the elastic member is disposed interior to the second wall in the direction orthogonal to the insertion direction.