Patents by Inventor Cheung Wun Yau

Cheung Wun Yau 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).

  • Motorized hand held cleaning tool with clamp on extension handle
    Patent number: 7203986
    Abstract: A cleaning tool having a clamp-on handle assembly. The clamp-on handle assembly includes a slidable locking element which can be moved from an open position, wherein the handle assembly can be placed over a handle portion of the cleaning tool, to a locked position wherein the locking element clamps the handle assembly securely onto the handle portion of the cleaning tool. Advantageously, no external tools or fastening implements are required to secure the handle assembly to the handle portion of the cleaning tool. The handling assembly allows the user to use the cleaning tool to reach elevated areas or other areas that would be difficult to reach with the user holding directly onto the handle portion of the cleaning tool.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: April 17, 2007
    Assignee: Black & Decker Inc.
    Inventors: Barry Pears, Cheung Wun Yau
  • Motorized hand held cleaning tool with clamp on extension handle
    Publication number: 20040261204
    Abstract: A cleaning tool having a clamp-on handle assembly. The clamp-on handle assembly includes a slidable locking element which can be moved from an open position, wherein the handle assembly can be placed over a handle portion of the cleaning tool, to a locked position wherein the locking element clamps the handle assembly securely onto the handle portion of the cleaning tool. Advantageously, no external tools or fastening implements are required to secure the handle assembly to the handle portion of the cleaning tool. The handling assembly allows the user to use the cleaning tool to reach elevated areas or other areas that would be difficult to reach with the user holding directly onto the handle portion of the cleaning tool.
    Type: Application
    Filed: June 27, 2003
    Publication date: December 30, 2004
    Inventors: Barry Pears, Cheung Wun Yau