Patents by Inventor Joong S. Chang

Joong S. Chang 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: 6186017
    Abstract: A multi-speed bicycle transmission having a housing including spaced, opposing face plates, with each face plate having a pedal shaft opening and a secondary shaft opening. A pedal shaft is rotatably disposed within the pedal shaft openings of the face plates, and a secondary shaft is disposed within the secondary shaft openings. As such, the secondary shaft is spaced from, and parallel to, the pedal shaft. A pedal shaft set of gears are mounted on the pedal shaft between the face plates. The pedal shaft set of gears include: (1) a first set of pedal shaft gears mounted on the pedal shaft, (2) a second set of pedal shaft gears rotatably mounted on the pedal shaft, and (3) a third set of pedal shaft gears rotatably mounted on the pedal shaft including first means for selective driving engagement with the second set of pedal shaft gears. The third set of pedal shaft gears including a drive gear means such as a sprocket for engaging a drive chain.
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: February 13, 2001
    Inventors: In H. Kang, Joong S. Chang