Patents by Inventor J Y Chu

J Y Chu 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).

  • Electric toothbrush mechanism
    Patent number: 7024718
    Abstract: A brushing head can be attached to or formed integrally with an electric toothbrush handle. The brushing head includes a casing, a rotary drive shaft extending within the casing and having a radially offset crank portion. A linear guide track extends in a direction across the drive shaft. A tuft block is mounted to the casing and interacts with the offset crank portion and the guide track to reciprocate linearly upon rotation of the drive shaft.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: April 11, 2006
    Inventor: J Y Chu
  • Electric toothbrush mechanism
    Publication number: 20040019987
    Abstract: A brushing head can be attached to or formed integrally with an electric toothbrush handle. The brushing head includes a casing, a rotary drive shaft extending within the casing and having a radially offset crank portion. A linear guide track extends in a direction across the drive shaft. A tuft block is mounted to the casing and interacts with the offset crank portion and the guide track to reciprocate linearly upon rotation of the drive shaft.
    Type: Application
    Filed: August 2, 2002
    Publication date: February 5, 2004
    Inventor: J Y. Chu