Patents by Inventor Yun-Yin Cheng

Yun-Yin Cheng 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).

  • Publication number: 20150051052
    Abstract: Disclosed is a flywheel device of a bicycle, including a flywheel means, a clutching means and a speed transforming means. The flywheel means is installed in rotation with the frame that is placed between the driving wheel and the driven wheel. The clutching means is engaged or disengaged between the flywheel means and the driving wheel according to an engaging state and a disengaging state thereof, wherein, a rotational energy is transferable between the flywheel means and the driving wheel during in the engaging state. The speed transforming means is connected between the flywheel means and the driving wheel by means of the clutching means to adjust a transmission ratio in relation to the driving wheel and the flywheel means.
    Type: Application
    Filed: November 25, 2013
    Publication date: February 19, 2015
    Inventors: Yun-Yin Cheng, Yi-Jia Wu