# US 10,865,968 B2 · LED lamp with first fin having gap portion > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,968 B2 - Document ID: US10865968B2 - Status: Granted - Kind: B2 - Application number: 16/794,253 - Filed: 2020-02-19 - Published: 2020-06-11 - Granted: 2020-12-15 - Earliest claimed: 2018-02-08 - Assignees: Jiaxing Super Lighting Electric Appliance Co., Ltd - Applicants: Jiaxing Super Lighting Electric Appliance Co., Ltd - Inventors: Tao Jiang; Mingbin Wang; Aiming Xiong; Lin Zhou - Web page: https://patentgrep.com/patent/US10865968B2 ## CPC - F21K 9/233: specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps - 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) - 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 9/238: Arrangement or mounting of circuit elements integrated in the light source - F21K 9/66: Details of globes or covers forming part of the light source - F21K 9/68: Details of reflectors forming part of the light source - F21V 7/0025: {Combination of two or more reflectors for a single light source (array of reflectors for a cluster of light sources F21V7/0083)} - F21V 23/009: {the casing being inside the housing of the lighting device} - F21V 29/503: of light sources (cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H10H20/858) - F21V 29/508: of electrical circuits - F21V 29/773: {the planes containing the fins or blades having the direction of the light emitting axis} - F21V 29/83: the elements having apertures, ducts or channels, e.g. heat radiation holes - H05B 45/00: Circuit arrangements for operating light-emitting diodes [LED] - H05B 45/37: Converter circuits - H05B 45/395: Linear regulators - H05B 45/56: involving measures to prevent abnormal temperature of the LEDs - F21Y 2103/33: annular - F21Y 2105/18: annular; polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam - F21Y 2115/10: Light-emitting diodes [LED] - H03H 7/0115: {comprising only inductors and capacitors (H03H7/075, H03H7/09, H03H7/12, H03H7/13 take precedence)} - H03H 11/04: Frequency selective two-port networks - Y02B 20/00: Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps - 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 - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - 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 - H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P) - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract An LED lamp includes: a lamp shell; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source disposed in the lamp shell; and a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; wherein the heat sink comprises first fins and second fins, each of the first fins is divided into two portions in a radial direction of the LED lamp, the two portions are divided with a gap portion, at least one of the second fins includes a third portion and two fourth portions, the third portion is connected to the fourth portion through a transition portion, the transition portion has a buffer section and a guide section, a direction of any tangent of the guide section is separate from the gap portion. ## Claims ### Claim 1 An LED (light emitting diode) lamp comprising: a lamp shell; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source disposed in the lamp shell; and a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; wherein the heat sink comprises first fins and second fins, each of the first fins is divided into two portions in a radial direction of the LED lamp, the two portions are divided with a gap portion, at least one of the second fins includes a third portion and two fourth portions, the third portion is connected to the fourth portion through a transition portion, the transition portion has a buffer section and a guide section, a direction of any tangent of the guide section is separate from the gap portion. ### Claim 2 (depends on 1) The LED lamp of claim 1 further comprising a base, bottoms of both the first fins and the second fins in an axis of the LED lamp connect to the base. ### Claim 3 (depends on 1) The LED lamp of claim 1, wherein the first fins interlace with the second fins at regular intervals. ### Claim 4 (depends on 1) The LED lamp of claim 1, wherein the two fourth portions are symmetrical about the third portion. ### Claim 5 (depends on 1) The LED lamp of claim 1 further comprising a first heat dissipating channel formed in a first chamber of the lamp shell for dissipating heat generated from the power source while the LED lamp is working. ### Claim 6 (depends on 2) The LED lamp of claim 2 further comprising a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips and transferred to the heat sink. ### Claim 7 (depends on 5) The LED lamp of claim 5, wherein the first heat dissipating channel comprises a first end on the light emitting surface to allow air flowing from outside of the LED lamp into the first chamber, and a second end on the upper portion of the lamp shell to allow air flowing from inside of the first chamber out of the LED lamp. ### Claim 8 (depends on 6) The LED lamp of claim 6, wherein the second heat dissipating channel comprises a third end on the light emitting surface to allow air flowing from outside of the LED lamp into the second heat dissipating channel, and flowing out from spaces between every adjacent two of the fins. ### Claim 9 (depends on 8) The LED lamp of claim 8, wherein the ratio of power of the LED lamp to heat dissipating area of the heat sink is 1:22˜26. ### Claim 10 (depends on 9) The LED lamp of claim 9, wherein an interval between one of the first fins and adjacent one of the second fins is 8˜12 mm. ### Claim 11 An LED (light emitting diode) lamp comprising: a lamp shell; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source disposed in the lamp shell; and a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; wherein the heat sink comprises first fins and second fins, each of the first fins is divided into two portions in a radial direction of the LED lamp, the two portions are divided with a gap portion, at least one of the second fins includes a third portion and two fourth portions, the third portion is connected to the fourth portion through a transition portion, the transition portion has a buffer section and a guide section, a direction of any tangent of the guide section falls in the gap portion. ### Claim 12 (depends on 1) The LED lamp of claim 1 further comprising a base, bottoms of both the first fins and the second fins in an axis of the LED lamp connect to the base. ### Claim 13 (depends on 1) The LED lamp of claim 1, wherein the first fins interlace with the second fins at regular intervals. ### Claim 14 (depends on 1) The LED lamp of claim 1, wherein the two fourth portions are symmetrical about the third portion. ### Claim 15 (depends on 1) The LED lamp of claim 1 further comprising a first heat dissipating channel formed in a first chamber of the lamp shell for dissipating heat generated from the power source while the LED lamp is working. ### Claim 16 (depends on 2) The LED lamp of claim 2 further comprising a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips and transferred to the heat sink. ### Claim 17 (depends on 5) The LED lamp of claim 5, wherein the first heat dissipating channel comprises a first end on the light emitting surface to allow air flowing from outside of the LED lamp into the first chamber, and a second end on the upper portion of the lamp shell to allow air flowing from inside of the first chamber out of the LED lamp. ### Claim 18 (depends on 6) The LED lamp of claim 6, wherein the second heat dissipating channel comprises a third end on the light emitting surface to allow air flowing from outside of the LED lamp into the second heat dissipating channel, and flowing out from spaces between every adjacent two of the fins. ### Claim 19 (depends on 8) The LED lamp of claim 8, wherein the ratio of power of the LED lamp to heat dissipating area of the heat sink is 1:22˜26. ### Claim 20 (depends on 9) The LED lamp of claim 9, wherein an interval between one of the first fins and adjacent one of the second fins is 8˜12 mm.