Patents by Inventor Tung-Chung Cheng

Tung-Chung Cheng 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).

  • Cleaning cylinder apparatus
    Patent number: 8950032
    Abstract: A novel cleaning tool is provided. A net-like carrier is twined on an inner cylinder. Protrusions of the inner cylinder are butted again a cleaning unit. With the net-like carrier and the protrusions, a bond between the cleaning unit and the inner cylinder is enhanced to strengthen the whole structure. Thus, stability of high-speed rotation of the cleaning unit is further improved to avoid separating the cleaning unit and the inner cylinder.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: February 10, 2015
    Assignee: Tung An Development Ltd.
    Inventors: Tung-Chung Cheng, Chih-An Ku, Hung-Chia Chen, Jung-Pin Mao
  • Cleaning Cylinder Apparatus
    Publication number: 20120096660
    Abstract: A novel cleaning tool is provided. A net-like carrier is twined on an inner cylinder. Protrusions of the inner cylinder are butted again a cleaning unit. With the net-like carrier and the protrusions, a bond between the cleaning unit and the inner cylinder is enhanced to strengthen the whole structure. Thus, stability of high-speed rotation of the cleaning unit is further improved to avoid separating the cleaning unit and the inner cylinder.
    Type: Application
    Filed: July 27, 2011
    Publication date: April 26, 2012
    Applicant: TUNG AN DEVELOPMENT LTD.
    Inventors: Tung-Chung Cheng, Chih-An Ku, Hung-Chia Chen, Jung-Pin Mao