Patents by Inventor King W. Cheung

King W. Cheung 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).

  • Dual tray carrier unit
    Patent number: 9099509
    Abstract: A tray carrier system having a tray loading position, a tray off-loading position, and four parallel rails extending from the tray loading position to the tray off-loading position. A tray carrier platform is disposed on each rail, where each tray carrier platform is configured to move along the rail on which it is disposed between the tray loading position and the tray off-loading position. Each tray carrier platform includes a carriage for engaging the rail, swing arms attached to the carriage, retaining pieces attached to the swing arms for selectively retaining and releasing a tray, and means for moving the swing arms between an open position and a closed position. The retaining pieces retain the tray at a tray level when the swing arms are in the closed position, and release the tray and are disposed entirely below the tray level when the swing arms are in the open position.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: August 4, 2015
    Assignee: KLA-Tencor Corporation
    Inventors: Foon M. Chan, King W. Cheung, Ka C. Leung, Chi Y. C. Chan, Carolus Truyens, Erik J. J. M. DeBlock, Jimmy J. D. Vermeulen
  • Dual Tray Carrier Unit
    Publication number: 20120090495
    Abstract: A tray carrier system having a tray loading position, a tray off-loading position, and four parallel rails extending from the tray loading position to the tray off-loading position. A tray carrier platform is disposed on each rail, where each tray carrier platform is configured to move along the rail on which it is disposed between the tray loading position and the tray off-loading position. Each tray carrier platform includes a carriage for engaging the rail, swing arms attached to the carriage, retaining pieces attached to the swing arms for selectively retaining and releasing a tray, and means for moving the swing arms between an open position and a closed position. The retaining pieces retain the tray at a tray level when the swing arms are in the closed position, and release the tray and are disposed entirely below the tray level when the swing arms are in the open position.
    Type: Application
    Filed: January 5, 2011
    Publication date: April 19, 2012
    Applicant: KLA-TENCOR CORPORATION
    Inventors: Foon M. Chan, King W. Cheung, Ka C. Leung, Chi Y.C. Chan, Carolus Truyens, Erik J.J.M. DeBlock, Jimmy J.D. Vermeulen