Patents by Inventor Kam Hung Ho

Kam Hung Ho 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).

  • Aluminum sleeve for magnetic development roller
    Patent number: 8191261
    Abstract: An aluminum sleeve for magnetic development rollers includes an aluminum sleeve and a shaft fixed at the ends of the aluminum sleeve for engaging with a gear, wherein an etching absorption layer is arranged on the surface of the aluminum sleeve, and a nickel plating protect layer is arranged onto the etching absorption layer. A manufacture method thereof involves forming an etching absorption layer on the surface of the aluminum sleeve via a chemical texture etching process, then forming a nickel plating protect layer onto the etching absorption layer via a nickel chemical plating process. The etching absorption layer has fine and uniform particles, and the nickel protect layer prevents the etching absorption layer from being oxidized and improves the wear resistance of the aluminum sleeve.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: June 5, 2012
    Assignee: SKC Precision Limited
    Inventor: Kam Hung Ho
  • Aluminum Sleeve for Magnetic Development Roller
    Publication number: 20090048083
    Abstract: An aluminum sleeve for magnetic development rollers includes an aluminum sleeve and a shaft fixed at the ends of the aluminum sleeve for engaging with a gear, wherein an etching absorption layer is arranged on the surface of the aluminum sleeve, and a nickel plating protect layer is arranged onto the etching absorption layer. A manufacture method thereof involves forming an etching absorption layer on the surface of the aluminum sleeve via a chemical texture etching process, then forming a nickel plating protect layer onto the etching absorption layer via a nickel chemical plating process. The etching absorption layer has fine and uniform particles, and the nickel protect layer prevents the etching absorption layer from being oxidized and improves the wear resistance of the aluminum sleeve.
    Type: Application
    Filed: February 14, 2006
    Publication date: February 19, 2009
    Inventor: Kam Hung Ho