Patents by Inventor Chuan-Chien Ching

Chuan-Chien Ching 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).

  • Drill bit grinder structure
    Patent number: 6676494
    Abstract: A drill bit grinder structure includes: a seat body having a housing, an arched sideboard with a predetermined curvature being disposed on one side of the housing, a slide slot with a predetermined length being formed on the arched sideboard; a fitting member inserted through the slide slot and slidable along the length of the slide slot; and a clamp head fitted through the fitting member. The drill bit grinder structure is characterized by at least a first engaging section disposed on a sidewall of the slide slot and at least a second engaging section disposed in a predetermined position on the circumference of the fitting member corresponding to the first engaging section. The second engaging section can be engaged with the first engaging section to locate the fitting member in a position within the slide slot.
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: January 13, 2004
    Inventor: Chuan-Chien Ching