Patents Assigned to TUNG AN DEVELOPMENT LTD.
  • Patent number: 11109667
    Abstract: A cleaning brush is provided. A cleaning unit comprises cleaning beans fixed on a surface of the carrier in a bi-spiral arrangement. The cleaning beans are arranged in an unequally-spaced manner on center of the carrier along a baseline; and, thus, bi-spirals are formed on the center and coiled in two different outward directions. Two annular spiral curve paths are formed with the cleaning beans as coiling the carrier and extending along the two directions. When the carrier cleans an electronic device, a solution or cleaning agent is discharged along the curve paths in spiral tangential directions. Hence, the bi-spiral cleaning unit obtains positive and negative directions on rotating to create a plurality of flow fields. Dirt is discharged easily with water distribution enhanced as compared to unidirectional spiral cleaning devices while a large contact surface, a good cleaning efficiency, and a high decontamination ratio are achieved.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: September 7, 2021
    Assignee: Tung An Development Ltd.
    Inventors: Chih-An Ku, Tzu-Yen Chuang, Hung-Chieh Chao, Fu-Qiang Zhang
  • Patent number: 10758946
    Abstract: A cleaning brush comprising a carrier and a cleaning unit is provided. The cleaning unit comprises a plurality of cleaning beans set on a surface of the carrier in a spiral arrangement. A spiral coiling around the carrier from an end of the carrier to the other end is formed. A spiral curve path is formed to coil the carrier circumferentially by extendedly arranging the cleaning beans. Hence, the present invention uses the cleaning beans of the cleaning unit to be set on surface of the carrier. On rotating in a fixed direction, the spiral cleaning unit generates a flow field which not only comprises a vertical flow for an object to be cleaned but also a horizontal flow forming a parallel stream. Thus, dirt can be removed more easily than by using a traditional matrix cleaning device.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: September 1, 2020
    Assignee: Tung An Development Ltd.
    Inventors: Chih-An Ku, Tzu-Yen Chuang, Hung-Chieh Chao
  • 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
  • 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
  • Publication number: 20100212100
    Abstract: A cleaning apparatus is provided to clean a sophisticated electric device. The apparatus has cleaning units and each of the cleaning units has a cambered top. Thus, coordinated with an actuating device, a sophisticated electric device can be cleaned by using the cleaning apparatus with cleaning units having cambered tops.
    Type: Application
    Filed: January 11, 2010
    Publication date: August 26, 2010
    Applicant: TUNG AN DEVELOPMENT LTD.
    Inventors: Chih-An Ku, Terry Cheng, Roy Chen