Patents by Inventor Chen Chuan-Fa

Chen Chuan-Fa 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).

  • Motor speed detecting device for use between motor and system
    Publication number: 20050077849
    Abstract: A motor speed detecting device for use between a motor and a system is provided. A motor speed detecting device for use between a motor and a system includes a first input terminal and a second input terminal, wherein the first and second input terminals are electrically connected respectively to a constant voltage potential and a ground potential for continuously receiving an electrical power; and a third input terminal electrically connected between the motor and the system, wherein the third input terminal receives a control signal sent by the system for controlling a speed of the motor. A motor speed control method using in a motor speed detecting device between a motor and a system is also provided.
    Type: Application
    Filed: October 8, 2003
    Publication date: April 14, 2005
    Applicant: Twinhead International Corp.
    Inventor: Chen Chuan-Fa