Patents by Inventor Samuel SweeChuan Gan

Samuel SweeChuan Gan 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).

  • Method and apparatus for predicting a head crash in a disc drive
    Patent number: 6822821
    Abstract: A head crash in a hard disc drive is predicted by periodically measuring a head-disc contact energy level on an actuator arm supporting the head and identifying a predetermined change in the energy level between at least two energy level measurements. The head-disc contact energy level is measured by a positioning microactuator on the actuator arm, and comparing that energy level to a threshold established during an earlier or selected contact start-stop cycle. A circuit is coupled to the microactuator and is periodically operable to identify a magnitude of contact energy. An indicator is coupled to the circuit and responsive to the representations to indicate presence of symptoms of an impending crash.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: November 23, 2004
    Assignee: Seagate Technology LLC
    Inventors: Samuel SweeChuan Gan, MuiChong Chai, Terang KongBeng Thia, Djohni Chandra, Sanh Tran
  • Method and apparatus for predicting a head crash in a disc drive
    Publication number: 20020097516
    Abstract: A head crash in a hard disc drive is predicted by periodically measuring a head-disc contact energy level on an actuator arm supporting the head and identifying a predetermined change in the energy level between at least two energy level measurements. The head-disc contact energy level is measured by a positioning microactuator on the actuator arm, and comparing that energy level to a threshold established during an earlier or selected contact start-stop cycle. A circuit is coupled to the microactuator and is periodically operable to identify a magnitude of contact energy. An indicator is coupled to the circuit and responsive to the representations to indicate presence of symptoms of an impending crash.
    Type: Application
    Filed: September 20, 2001
    Publication date: July 25, 2002
    Inventors: Samuel SweeChuan Gan, MuiChong Chai, Terang KongBeng Thia, Djohni Chandra, Sanh Tran