Patents by Inventor Dustin Mark Cvancara

Dustin Mark Cvancara 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).

  • Boosted preheat trajectory to obtain desired clearance before writing to disk
    Patent number: 10366719
    Abstract: A clearance heater of a write head is engaged with a boosted current that exceeds a steady-state current. The steady-state current causes the write head to maintain a desired clearance over a disk during writing, the boosted current being applied before a start of the writing. The boosted current is monotonically decreased before the start of the writing and the steady-state current is applied to the heater after the start of the writing.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: July 30, 2019
    Assignee: Seagate Technology LLC
    Inventors: Jason W. Riddering, Dustin Mark Cvancara, Kenneth A. Haapala, Eric John McCalla, Wenzhong Zhu, Bin Huang
  • Apparatus and method for maintaining stability in a disc drive servo loop
    Patent number: 7136257
    Abstract: An apparatus and method of maintaining stability in a servo loop of a disc drive is provided. A dither signal (a single frequency sine wave or a multi-frequency signal) is injected into the servo loop. A servo loop gain error signal is obtained in response to the injected dither signal. A gain of the servo loop is adjusted as a function of the servo loop gain error signal in real-time.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: November 14, 2006
    Assignee: Seagate Technology LLC
    Inventors: Tao Zhang, John Christopher Morris, Dustin Mark Cvancara, Raye Abdoulie Sosseh
  • Apparatus and method for maintaining stability in a disc drive servo loop
    Publication number: 20040228027
    Abstract: An apparatus and method of maintaining stability in a servo loop of a disc drive is provided. A dither signal (a single frequency sine wave or a multi-frequency signal) is injected into the servo loop. A servo loop gain error signal is obtained in response to the injected dither signal. A gain of the servo loop is adjusted as a function of the servo loop gain error signal in real-time.
    Type: Application
    Filed: May 16, 2003
    Publication date: November 18, 2004
    Inventors: Tao Zhang, John Christopher Morris, Dustin Mark Cvancara, Raye Abdoulie Sosseh