Patents by Inventor Quan-quan Yang

Quan-quan Yang 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).

  • Conductive composite material with positive temperature coefficient of resistance and overcurrent protection component
    Patent number: 8653932
    Abstract: A PTC conductive composite material and the overcurrent protection device made of the material are disclosed. The PTC conductive composite material includes: (a) A matrix of crystalline polymer material at least, occupies 20%-70% of the volume fraction of the PTC conductive composite material, (b) One kind of conductive filler occupies 30%-80% of the volume fraction of the material. The solid solution conductive filler is uniformly dispersed in the polymer material, whose average particle size ranges from 0.1 ?m to 10 ?m, and the volume resistivity is no more than 300 ??·cm. The overcurrent protection device prepared by using the PTC conductive composite material as described above includes two metal foils, which are made into a sandwich, separated by a layer of the PTC conductive composite material. And the advantages of the overcurrent protection device of the invention are low resistance, good reproducibility of resistance and well PTC intensity.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: February 18, 2014
    Assignee: Shanghai Changyuan Wayon Circuit Protection Co., Ltd.
    Inventors: Quan-quan Yang, Zhengping Liu, Yutang Liu, Daohua Gao, Jun Wang, Congwu Li
  • CONDUCTIVE COMPOSITE MATERIAL WITH POSITIVE TEMPERATURE COEFFICIENT OF RESISTANCE AND OVERCURRENT PROTECTION COMPONENT
    Publication number: 20130094116
    Abstract: A PTC conductive composite material and the overcurrent protection device made of the material are disclosed. The PTC conductive composite material includes: (a) A matrix of crystalline polymer material at least, occupies 20%-70% of the volume fraction of the PTC conductive composite material, (b) One kind of conductive filler occupies 30%-80% of the volume fraction of the material. The solid solution conductive filler is uniformly dispersed in the polymer material, whose average particle size ranges from 0.1 ?m to 10 ?m, and the volume resistivity is no more than 300 ??·cm. The overcurrent protection device prepared by using the PTC conductive composite material as described above includes two metal foils, which are made into a sandwich, separated by a layer of the PTC conductive composite material. And the advantages of the overcurrent protection device of the invention are low resistance, good reproducibility of resistance and well PTC intensity.
    Type: Application
    Filed: September 13, 2010
    Publication date: April 18, 2013
    Inventors: Quan-quan Yang, Zhengping Liu, Yutang Liu, Daohua Gao, Jun Wang, Congwu Li