Patents by Inventor Fen-Lien Li

Fen-Lien Li 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).

  • Air driven motor for a tool
    Patent number: 5954141
    Abstract: The present invention relates to a motor for an air-tool. More particularly, the present invention is directed to an air driven motor in which the rotor has a plurality of recesses formed between each pair of adjacent vane holding slots. A separator fine is fixed in each recess. Each vane of the rotor is radially displaceable and outwardly biased to expose a compressed air contact surface area. The separator fins add additional compressed air contact surface areas.
    Type: Grant
    Filed: September 22, 1997
    Date of Patent: September 21, 1999
    Inventors: Fen-Lien Li, Jenn-Long Shiau