Patents by Inventor Cai-xi Xu

Cai-xi Xu 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).

  • Bicycle with bevel gear drive for children
    Patent number: 6446995
    Abstract: A children's bicycle with a bevel gear driving device that includes a pedal intermediate axle, characterized in that the pedal intermediate axle is connected with a drive bevel gear, which drives a connecting rod having bevel gears on both ends thereof, that the bevel gear on the other end of the connecting rod drives the rear wheel bevel gear, and that protecting hoods are provided over the driving bevel gear, the connecting rod with bevel gears, and the rear wheel bevel gear. The driving device avoids the problem of chain falling-off and allows safer use.
    Type: Grant
    Filed: February 24, 2000
    Date of Patent: September 10, 2002
    Assignee: Shanghai Baoqi Bicycle Co., Ltd.
    Inventors: Cai-xi Xu, Jia-kuan Zhu