Patents by Inventor Ching-Dong Pai

Ching-Dong Pai 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).

  • Pipe joining construction of a bicycle frame
    Patent number: 5318819
    Abstract: A pipe joining construction includes a tube, two or more extensions extended from the tube, a tube member coupled to each of the extensions so as to form a joint portion, an insert disposed in each of the tube members and the extensions and having an envelope and a foamable material disposed in the envelope, a covering having an outer layer wrapped around the joint portion and a foamable material disposed between the outer layer and the joint portion. When foamed, the foamable materials apply forces against the tube members and the extensions so as to solidly couple them together.
    Type: Grant
    Filed: February 9, 1993
    Date of Patent: June 7, 1994
    Inventor: Ching-Dong Pai