Patents by Inventor Chuan-Fa Chen

Chuan-Fa Chen 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
    Patent number: 6965208
    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: Grant
    Filed: October 8, 2003
    Date of Patent: November 15, 2005
    Assignee: Twinhead International Corp.
    Inventor: Chuan-Fa Chen