Patents by Inventor Hemmant Gopal

Hemmant Gopal 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).

  • Detection of Spindle Motor Degradation
    Publication number: 20080159105
    Abstract: Systems and methods are disclosed for detecting spindle motor degradation. A method includes issuing an alert if a difference between feed forward compensation signals of repeatable runout determined at a first time and feed forward compensation signals of repeatable runout determined at a second time satisfies a first threshold condition. A method may further include issuing an alert if a delta difference between a first difference and a second difference satisfies a second threshold condition. The first difference represents a difference between the feed forward compensation signals of repeatable runout at the first time and the feed forward compensation signals of repeatable runout at the second time. The second difference represents a difference between the feed forward compensation signals of repeatable runout at the first time and feed forward compensation signals of repeatable runout at a third time.
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Hemmant Gopal, Bijan Tehrani, David J. Kaphammer, Mirmehdi L. Abrishamchian