Patents by Inventor Yu-Hwa Wei

Yu-Hwa Wei 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).

  • Leakproof device of wire cut machine
    Patent number: 6429395
    Abstract: A leakproof device of the work tank of a wire cut machine comprising a fixed plate fastened on the work tank, and a locating plate fastened with a lower arm of the wire cut machine. The fixed plate is provided in the fringe of a hollow portion thereof with an annular slot into which the compressed air is injected to form an air wall to reduce the friction between fixed plate and movable plate, also to prevent the machining fluid leaking from the work tank.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: August 6, 2002
    Inventor: Yu-Hwa Wei