Patents by Inventor Yau-Shing Chao

Yau-Shing Chao 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).

  • Patent number: 4367067
    Abstract: A ball chain positive drive stepless transmission comprising two V sheaves deployed on a pair of parallel shafts and an endless ball chain serving as transmission medium therebetween and characterized in, each sheave having a V shaped groove formed by two opposite bevel members with an undulating surface readily disposed thereon. Each link of the chain has a ball set adapted to be positively engaged with the undulating surface and also to enable the stepless change of speed while the unit is at rest.
    Type: Grant
    Filed: August 7, 1980
    Date of Patent: January 4, 1983
    Inventor: Yau-Shing Chao