Patents by Inventor Hung-Chou Lu

Hung-Chou Lu 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).

  • Publication number: 20070251438
    Abstract: An adjustable punching device includes a base having a first through hole, a second through hole, a third through hole and a fourth through hole with predetermined separation, a first clamping section and a second clamping section adjacent to the third through hole and the fourth through hole. A fixed knife rack is arranged on each side of the base. The knife for each knife rack is corresponding to the first through hole and the second through hole. A lateral panel is arranged on outer side of the fixed knife rack. A pressing plate is pivotally connected between the lateral panels. A movable knife stage is arranged between two fixed knife racks. The movable knife stage is limited between the first clamping sections and on the second clamping sections. The movable knife rack is corresponding to the third through hole and the fourth through hole. After the hole separation has been adjusted, the pressing plate is pressed to punch holes with fixed separation.
    Type: Application
    Filed: April 28, 2006
    Publication date: November 1, 2007
    Inventors: Chao-Tung Shih, Hung-Chou Lu