Patents by Inventor Du Yaosheng

Du Yaosheng 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).

  • Integrated thermistor and metallic element device and method
    Patent number: 9190833
    Abstract: A circuit protection device includes a fuse element placed in parallel with a PTC thermistor layer. The element and PTC thermistor layer are provided on one or more insulating substrate, such as an FR-4 or polyimide substrate. First and second conductors connect the fuse element and PTC thermistor layer electrically in parallel, such that current (i) initially under normal flows mainly through the fuse element and PTC thermistor layer at a lower drop in voltage and (ii) after an opening of the fuse element flows under normal operation through the PTC thermistor layer at a higher drop in voltage.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: November 17, 2015
    Assignee: LITTELFUSE, INC.
    Inventors: James A. Colby, Stephen Whitnery, Du Yaosheng
  • INTEGRATED THERMISTOR AND METALLIC ELEMENT DEVICE AND METHOD
    Publication number: 20090027821
    Abstract: A circuit protection device includes a fuse element placed in parallel with a PTC thermistor layer. The element and PTC thermistor layer are provided on one or more insulating substrate, such as an FR-4 or polyimide substrate. First and second conductors connect the fuse element and PTC thermistor layer electrically in parallel, such that current (i) initially under normal flows mainly through the fuse element and PTC thermistor layer at a lower drop in voltage and (ii) after an opening of the fuse element flows under normal operation through the PTC thermistor layer at a higher drop in voltage.
    Type: Application
    Filed: July 26, 2007
    Publication date: January 29, 2009
    Applicant: LITTELFUSE, INC.
    Inventors: James A. Colby, Stephen Whitney, Du Yaosheng