Patents by Inventor Yen W. Chen

Yen W. Chen 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).

  • On the table automatic operation type of pivot-pin fitting machine
    Patent number: 4730379
    Abstract: This invention discloses an automatic pivot pin installation apparatus. It mainly consists of two up and down air-cylinders on different sides of a table base. The upper cylinder puts the steel wire into the position of the mold and a cutter driven by the back side cylinder cuts the wire. Pieces of wires then are pressed down to prearranged installation position of the pivot pin. Then the pins are pushed simultaneously into the pin holes of the object fixed at the central mold of the structure base by means of the lower cylinders of each side.
    Type: Grant
    Filed: August 1, 1986
    Date of Patent: March 15, 1988
    Inventor: Yen W. Chen