Patents by Inventor Hei Shun Leung

Hei Shun Leung 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).

  • Auxiliary sander attachment for portable sander
    Patent number: 8727838
    Abstract: A sander has two abrasive-supporting base parts mounted to an oscillating drive mechanism. The base parts may support a sandpaper sheet, or the like, and are connected to one another in a manner allowing ready reconfiguration for different applications. One of the base parts is connected by a pivoting coupling to the other for movement between extended and retracted positions. Latching means releasably lock the coupling so as to hold the parts in the extended position.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: May 20, 2014
    Assignee: Techtronic Power Tools Technology Limited
    Inventors: Hei Shun Leung, Kwok Ting Mok
  • SANDER
    Publication number: 20120003905
    Abstract: A sander has two abrasive-supporting base parts mounted to an oscillating drive mechanism. The base parts may support a sandpaper sheet, or the like, and are connected to one another in a manner allowing ready reconfiguration for different applications. One of the base parts is connected by a pivoting coupling to the other for movement between extended and retracted positions. Latching means releasably lock the coupling so as to hold the parts in the extended position.
    Type: Application
    Filed: June 28, 2011
    Publication date: January 5, 2012
    Inventors: Hei Shun Leung, Kwok Ting Mok
  • Keyless drill chuck
    Patent number: D461696
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: August 20, 2002
    Assignee: TechTronic Industries Co., Ltd.
    Inventors: Daniel A. Chunn, Meily Siu Mei Chan, Felix Hei Shun Leung, Benson Chun Kit Cheung
  • Keyless drill chuck
    Patent number: D461697
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: August 20, 2002
    Assignee: TechTronic Co., LTD
    Inventors: Daniel A. Chunn, Meily Siu Mei Chan, Felix Hei Shun Leung
  • Keyless drill chuck
    Patent number: D462249
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: September 3, 2002
    Assignee: TechTronic Industries Co., LTD
    Inventors: Daniel A. Chunn, Meily Siu Mei Chan, Felix Hei Shun Leung, Benson Chun Kit Cheung
  • Keyless drill chuck
    Patent number: D472443
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: April 1, 2003
    Assignee: TechTronic Industries Co., LTD
    Inventors: Daniel A. Chunn, Meily Siu Mei Chan, Felix Hei Shun Leung
  • Keyless drill chuck
    Patent number: D474387
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: May 13, 2003
    Assignee: TechTronic Industries Co., LTD
    Inventors: Daniel A. Chunn, Meily Siu Mei Chan, Felix Hei Shun Leung