Patents by Inventor Hung-Nung Tsai

Hung-Nung Tsai 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).

  • Knife sharpener
    Patent number: 7854650
    Abstract: A knife sharpener comprises a base, a motor, a grinding wheel assembly, a rotary shaft and a spring. The working channel between the edge of the grinding disc and the grinding awl is automatically adjustable to accommodate different blade of different thickness. When the knife sharpener performs grinding operation, the grinding wheel assembly can simultaneously grind both cutting sides of the knife. In addition, the knife can be clamped firmly through the three contacting points of the grinding disc, the grinding awl, and the cutting edge, so that the operation of knife grinding can be successfully performed.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: December 21, 2010
    Inventor: Hung-Nung Tsai
  • Knife Sharpener
    Publication number: 20100099338
    Abstract: A knife sharpener comprises a base, a motor, a grinding wheel assembly, a rotary shaft and two springs. The working channel between the edge of the grinding disc and the grinding awl is automatically adjustable to accommodate different blade of different thickness. When the knife sharpener performs grinding operation, the grinding wheel assembly can simultaneously grind both cutting sides of the knife. In addition, the knife can be clamped firmly through the three contacting areas of the grinding disc, the grinding awl, and the cutting edge, so that the operation of knife grinding can be successfully performed.
    Type: Application
    Filed: December 25, 2009
    Publication date: April 22, 2010
    Inventor: Hung-Nung Tsai