Patents by Inventor Yao-Te Chang
Yao-Te Chang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240127988Abstract: An over-current protection device includes a first metal layer, a second metal layer and a heat-sensitive layer laminated therebetween. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic and includes a first polymer and a conductive filler. The first polymer consists of polyvinylidene difluoride (PVDF), and PVDF exists in different phases such as ?-PVDF, ?-PVDF and ?-PVDF. The total amount of ?-PVDF, ?-PVDF and ?-PVDF is calculated as 100%, and the amount of ?-PVDF accounts for 48% to 55%. The conductive filler has a metal-ceramic compound.Type: ApplicationFiled: March 2, 2023Publication date: April 18, 2024Inventors: HSIU-CHE YEN, YUNG-HSIEN CHANG, CHENG-YU TUNG, Chia-Yuan Lee, CHEN-NAN LIU, Yao-Te Chang, FU-HUA CHU
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Publication number: 20240127989Abstract: An over-current protection device includes a first metal layer, a second metal layer and a heat-sensitive layer laminated therebetween. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic and includes a first polymer and a conductive filler. The first polymer consists of polyvinylidene difluoride (PVDF), and PVDF exists in different phases such as ?-PVDF, ?-PVDF and ?-PVDF. The total amount of ?-PVDF, ?-PVDF and ?-PVDF is calculated as 100%, and the amount of ?-PVDF accounts for 33% to 42%.Type: ApplicationFiled: January 25, 2023Publication date: April 18, 2024Inventors: CHIA-YUAN LEE, CHENG-YU TUNG, HSIU-CHE YEN, CHEN-NAN LIU, YUNG-HSIEN CHANG, YAO-TE CHANG, FU-HUA CHU
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Publication number: 20230395288Abstract: An over-current protection device includes first and second electrode layers and a PTC material layer laminated therebetween. The PTC material layer includes a polymer matrix, a conductive filler, and a titanium-containing dielectric filler. The polymer matrix has a fluoropolymer. The titanium-containing dielectric filler has a compound represented by a general formula of MTiO3, wherein the M represents transition metal or alkaline earth metal. The total volume of the PTC material layer is calculated as 100%, and the titanium-containing dielectric filler accounts to for 5-15% by volume of the PTC material layer.Type: ApplicationFiled: September 28, 2022Publication date: December 7, 2023Inventors: Hsiu-Che YEN, Yung-Hsien CHANG, Cheng-Yu TUNG, Chen-Nan LIU, Chia-Yuan LEE, Yu-Chieh FU, Yao-Te CHANG, Fu-Hua CHU
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Publication number: 20230395287Abstract: An over-current protection device comprises first and second electrode layers and a PTC material layer laminated therebetween. The PTC material layer includes a polymer matrix, a conductive filler and a titanium-containing inner filler. The polymer matrix has a fluorine-free polyolefin-based polymer. The titanium-containing inner filler has a compound represented by a general formula of MTiO3, wherein the M represents transition metal or alkaline earth metal. The total volume of the PTC material layer is calculated as 100%, and the titanium-containing inner filler accounts for 1-9% by volume of the PTC material layer.Type: ApplicationFiled: January 5, 2023Publication date: December 7, 2023Inventors: CHEN-NAN LIU, YUNG-HSIEN CHANG, HSIU-CHE YEN, CHENG-YU TUNG, CHIA-YUAN LEE, YU-CHIEH FU, YAO-TE CHANG, FU-HUA CHU
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Patent number: 11594877Abstract: An over-current protection device comprises first and second electrode layers and a PTC material layer laminated therebetween. The PTC material layer comprises a polymer matrix and carbon black. The polymer matrix comprises a fluoropolymer having a melting point higher than 150° C. The carbon black is dispersed in the polymer matrix. A resistance jump Rjump_1000@16V/50A of the over-current protection device at 16V/50 A by 1000 cycles is 0.80-1.20. A resistance jump Rjump_1000@25V/50A of the over-current protection device at 25V/50 A by 1000 cycles is 0.90-1.30.Type: GrantFiled: August 25, 2021Date of Patent: February 28, 2023Assignee: POLYTRONICS TECHNOLOGY CORP.Inventors: Zhen Yu Dong, Yung Hsien Chang, Hsiu Che Yen, Yao Te Chang, Fu Hua Chu, Takashi Hasunuma
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Patent number: 11574750Abstract: An over-current protection device comprises first and second electrode layers and a PTC material layer laminated therebetween. The PTC material layer comprises a polymer matrix, a conductive ceramic filler, a carbon-containing conductive filler, and an inner filler. The polymer matrix comprises a fluoropolymer having a melting point higher than 150° C. The inner filler is selected from one of aluminum nitride, silicon carbide, zirconium oxide, boron nitride, graphene, aluminum oxide, or any mixtures thereof, and comprises 2-10% by volume of the PTC material layer. The over-current protection device is able to mitigate negative temperature coefficient (NTC) behavior after trip of device, and achieves high hold current and high endurable power.Type: GrantFiled: August 20, 2021Date of Patent: February 7, 2023Assignee: POLYTRONICS TECHNOLOGY CORP.Inventors: Hsiu Che Yen, Yung Hsien Chang, Zhen Yu Dong, Yao Te Chang, Fu Hua Chu
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Publication number: 20220399716Abstract: An over-current protection device comprises first and second electrode layers and a PTC material layer laminated therebetween. The PTC material layer comprises a polymer matrix and carbon black. The polymer matrix comprises a fluoropolymer having a melting point higher than 150° C. The carbon black is dispersed in the polymer matrix. A resistance jump Rjump_1000@16V/50A of the over-current protection device at 16V/50 A by 1000 cycles is 0.80-1.20. A resistance jump R1000@16V/50A of the over-current protection device at 25V/50 A by 1000 cycles is 0.90-1.30.Type: ApplicationFiled: August 25, 2021Publication date: December 15, 2022Inventors: ZHEN YU DONG, YUNG HSIEN CHANG, HSIU CHE YEN, YAO TE CHANG, Fu Hua Chu, TAKASHI HASUNUMA
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Publication number: 20220375658Abstract: An over-current protection device comprises first and second electrode layers and a PTC material layer laminated therebetween. The PTC material layer comprises a polymer matrix, a conductive ceramic filler, a carbon- containing conductive filler, and an inner filler. The polymer matrix comprises a fluoropolymer having a melting point higher than 150° C. The inner filler is selected from one of aluminum nitride, silicon carbide, zirconium oxide, boron nitride, graphene, aluminum oxide, or any mixtures thereof, and comprises 2-10% by volume of the PTC material layer. The over-current protection device is able to mitigate negative temperature coefficient (NTC) behavior after trip of device, and achieves high hold current and high endurable power.Type: ApplicationFiled: August 20, 2021Publication date: November 24, 2022Inventors: HSIU CHE YEN, YUNG HSIEN CHANG, ZHEN YU DONG, YAO TE CHANG, Fu Hua Chu
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Patent number: 11018502Abstract: A cable comprises a power conductor, a data conductor and a first PTC device. The power conductor is configured to transmit electrical power between a source and a sink. The data conductor is configured to transmit data between the source and the sink. The first PTC device is coupled to the data conductor and its resistance increases drastically to decrease current flowing through the data conductor if a temperature of the first PTC device exceeds a first trip temperature. The first trip temperature is 55-80° C. The resistance of the PTC device is larger than 20 k? at 85° C. and larger than 80 k? at 100° C. A current flowing through the data conductor does not exceed 20 mA.Type: GrantFiled: March 1, 2019Date of Patent: May 25, 2021Assignee: Polytronics Technology Corp.Inventors: Zhen Yu Dong, Yung Hsien Chang, Hsiu Che Yen, Yao Te Chang, Pin Syuan Li
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Patent number: 10902980Abstract: An over-current protection device comprises first and second electrode layers and a PTC material layer laminated therebetween. The PTC material layer comprises a polymer, an electrically conductive filler and a metal compound filler. The PTC material layer comprises the polymer of 50-70% by volume, and the electrically conductive filler and the metal compound filler are distributed in the polymer. The metal compound filler has a particle size D50 of 2-15 ?m and 5-20% by volume and is selected from the group consisting of aluminum nitride, aluminum hydroxide, aluminum oxide, titanium oxide and zirconium oxide. The over-current protection device has a resistivity of 0.7-1.2 ?·cm.Type: GrantFiled: April 9, 2020Date of Patent: January 26, 2021Assignee: POLYTRONICS TECHNOLOGY CORP.Inventors: Zhen-Yu Dong, Yung-Hsien Chang, Hsiu-Che Yen, Yao-Te Chang, Fu-Hua Chu
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Patent number: 10892072Abstract: A PTC device comprises a laminated substrate, a first PTC material layer, a second PTC material layer, a first metal layer and a second metal layer. The laminated substrate comprises a first conductive layer, a second conductive layer and an insulating layer laminated between the first and second conductive layers. The first PTC material layer is disposed on the first conductive layer, and the second PTC material layer is disposed on the second conductive layer. The first metal layer is disposed on the first PTC material layer, and the second metal layer is disposed on the second PTC material layer. The insulating layer has a through hole filled with PTC material to form a PTC connecting member of which one end connects to the first PTC material layer and another end connects to the second PTC material layer.Type: GrantFiled: April 9, 2020Date of Patent: January 12, 2021Assignee: POLYTRONICS TECHNOLOGY CORP.Inventors: Chun-Teng Tseng, Yao-Te Chang, Wen Feng Lee
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Patent number: 10096407Abstract: A surface mountable over-current protection device comprises a PTC material layer, first and second conductive layers, left and right electrodes, left and right conductive members, and left and right insulating members. The PTC material layer comprises a left notch at a left end and a right notch at a right end. The first conductive layer comprises a primary portion disposed on an upper surface of the PTC material layer and a secondary portion extending over the left notch, and the second conductive layer comprises a primary portion disposed on a lower surface of the PTC material layer and a secondary portion extending over the underside of the right notch. The left conductive member connects to the left electrode and the first conductive layer and isolates from the second conductive layer. The right conductive member connects to the right electrode and the second conductive layer and isolates from the first conductive layer.Type: GrantFiled: February 21, 2017Date of Patent: October 9, 2018Assignee: POLYTRONICS TECHNOLOGY CORP.Inventors: Chun Teng Tseng, Wen Feng Lee, Yung Hsien Chang, Yao Te Chang
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Patent number: 10056176Abstract: An over-current protection device comprises a PTC device and a heating element operable to heat the PTC device. The PTC device contains crystalline polymer and metal or ceramic conductive filler dispersed therein. The PTC device has a resistivity less than 0.1 ?·cm. The over-current protection device has the relation: It (heating)<Ih (60° C.)×10%, where Ih (60° C.) is a hold current of the over-current protection device at 60° C. when the heating element is not activated; It (heating) is a trip current of the over-current protection device when the heating element is activated to heat the PTC device. The PTC device has high hold current, thereby allowing a battery containing the device can be fast charged with a large current. In a specific situation, the heating element heats the PTC device to decrease the hold current of the over-current protection device of low resistivity, and accordingly the PTC device can trip by a small current.Type: GrantFiled: May 17, 2016Date of Patent: August 21, 2018Assignee: Polytronics Technology Corp.Inventors: David Shau Chew Wang, Chun Teng Tseng, Tsungmin Su, Yao Te Chang
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Patent number: 9997906Abstract: An over-current protection device comprises first and second electrode layers and a PTC material layer laminated therebetween. The PTC material layer has a resistivity less than 0.05 ?·cm and comprises a polymer matrix, a conductive ceramic filler and a carbon-containing conductive filler. The polymer matrix comprises a fluoropolymer having a melting point higher than 150° C. and comprises 50-60% by volume of the PTC material layer. The conductive ceramic filler having a resistivity less than 500??·cm is dispersed in the polymer matrix and comprises 40-45% by volume of the PTC material layer. The carbon-containing conductive filler is dispersed in the polymer matrix and comprises 0.5-5% by volume of the PTC material layer. At 25° C., a ratio of a hold current to an area of the over-current protection device is 0.21-0.3 A/mm2, and a ratio of an endurable power to the area of the over-current protection device is 4.8-7.2 W/mm2.Type: GrantFiled: September 21, 2017Date of Patent: June 12, 2018Assignee: Polytronics Technology Corp.Inventors: Hsiu Che Yen, Yung Hsien Chang, Zhen Yu Dong, Yao Te Chang, David Shau Chew Wang
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Publication number: 20180033527Abstract: A surface mountable over-current protection device comprises a PTC material layer, first and second conductive layers, left and right electrodes, left and right conductive members, and left and right insulating members. The PTC material layer comprises a left notch at a left end and a right notch at a right end. The first conductive layer comprises a primary portion disposed on an upper surface of the PTC material layer and a secondary portion extending over the left notch, and the second conductive layer comprises a primary portion disposed on a lower surface of the PTC material layer and a secondary portion extending over the underside of the right notch. The left conductive member connects to the left electrode and the first conductive layer and isolates from the second conductive layer. The right conductive member connects to the right electrode and the second conductive layer and isolates from the first conductive layer.Type: ApplicationFiled: February 21, 2017Publication date: February 1, 2018Inventors: Chun Teng TSENG, Wen Feng LEE, Yung Hsien CHANG, Yao Te CHANG
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Publication number: 20170018339Abstract: An over-current protection device comprises a PTC device and a heating element operable to heat the PTC device. The PTC device contains crystalline polymer and metal or ceramic conductive filler dispersed therein. The PTC device has a resistivity less than 0.1 ?·cm. The over-current protection device has the relation: It (heating)<Ih (60° C.)×10%, where Ih (60° C.) is a hold current of the over-current protection device at 60° C. when the heating element is not activated; It (heating) is a trip current of the over-current protection device when the heating element is activated to heat the PTC device. The PTC device has high hold current, thereby allowing a battery containing the device can be fast charged with a large current. In a specific situation, the heating element heats the PTC device to decrease the hold current of the over-current protection device of low resistivity, and accordingly the PTC device can trip by a small current.Type: ApplicationFiled: May 17, 2016Publication date: January 19, 2017Inventors: David Shau Chew WANG, Chun Teng TSENG, Tsungmin SU, Yao Te CHANG
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Patent number: 9349510Abstract: A PTC device comprises two electrode layers and a PTC material layer laminated therebetween. The PTC material layer has a volumetric resistivity less than 0.2 ?-cm, and comprises a crystalline polymer, conductive ceramic fillers and crystalline low molecular weight organic compound. The crystalline polymer comprises thermoplastic polymer, thermosetting polymer or combination thereof. The conductive ceramic fillers dispersed in the crystalline polymer have volumetric resistivity less than 500 ??-cm, and comprise 40-70% by volume of the PTC material layer. The crystalline low molecular weight organic compound has a molecular weight less than 5000, and comprises 6-30% by volume of the PTC material layer. The hold current at 60° C. divided by a covered area of the PTC device is greater than 0.2 A/mm2, the hold current at 60° C. is 40-95% of the hold current at 25° C., and the trip temperature of the PTC device is less than 95° C.Type: GrantFiled: February 11, 2015Date of Patent: May 24, 2016Assignee: POLYTRONICS TECHNOLOGY CORP.Inventors: Kuo Chang Lo, Yao Te Chang
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Publication number: 20160035468Abstract: A PTC device comprises two electrode layers and a PTC material layer laminated therebetween. The PTC material layer has a volumetric resistivity less than 0.2 ?-cm, and comprises a crystalline polymer, conductive ceramic fillers and crystalline low molecular weight organic compound. The crystalline polymer comprises thermoplastic polymer, thermosetting polymer or combination thereof. The conductive ceramic fillers dispersed in the crystalline polymer have volumetric resistivity less than 500 ??-cm, and comprise 40-70% by volume of the PTC material layer. The crystalline low molecular weight organic compound has a molecular weight less than 5000, and comprises 6-30% by volume of the PTC material layer. The hold current at 60° C. divided by a covered area of the PTC device is greater than 0.2 A/mm2, the hold current at 60° C. is 40-95% of the hold current at 25° C., and the trip temperature of the PTC device is less than 95° C.Type: ApplicationFiled: February 11, 2015Publication date: February 4, 2016Inventors: Kuo Chang LO, Yao Te CHANG
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Patent number: 8960959Abstract: A handle assembly for a luggage includes a case and a handle assembly. The case has an assembling portion recessed on one side of a top portion of the case towered a bottom portion of the case. The handle assembly is assembled to the case. The handle assembly is a transparent or semi-transparent plastic tube. One end of the handle assembly is inserted into the assembling portion, so that the handle assembly is slidable relative to the case. The handle assembly has a handle grip assembled with another end thereof. When the handle assembly is retracted into the case, the handle grip is abutted against the case.Type: GrantFiled: March 14, 2013Date of Patent: February 24, 2015Inventors: Lien-Ti Chen, Yao-Te Chang
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Publication number: 20140268784Abstract: A handle assembly for a luggage includes a case and a handle assembly. The case has an assembling portion recessed on one side of a top portion of the case towered a bottom portion of the case. The handle assembly is assembled to the case. The handle assembly is a transparent or semi-transparent plastic tube. One end of the handle assembly is inserted into the assembling portion, so that the handle assembly is slidable relative to the case. The handle assembly has a handle grip assembled with another end thereof. When the handle assembly is retracted into the case, the handle grip is abutted against the case.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Inventors: Lien-Ti Chen, Yao-Te Chang