Patents by Inventor Chee Shum

Chee Shum 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).

  • Pickup unit homing mechanism for a disk drive unit
    Publication number: 20060156323
    Abstract: A disk drive unit (1) for a disk, comprising a mounting plate (2), a spindle motor assembly (3), a slide mechanism (6) provided with a slide (8), a pickup unit (4) mounted on the slide (8), a first transmission member (12) operatively connected with the slide (8), and a second transmission member (13), wherein the first transmission member (12) is positioned such that it is in engagement with the second transmission member (13) when the pickup unit (4) is in its read and/or write position and such that the first transmission member (12) is out of engagement with the second transmission member (13) when the pickup unit (4) is in its home position. In order to bring the first and second transmission members (12, 13) into engagement, the transmission members are provided with engagement members (18, 19). As a result, a limit switch assembly is no longer necessary.
    Type: Application
    Filed: June 23, 2004
    Publication date: July 13, 2006
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Kum Loh, Yu Zhou, Chee Shum