Patents by Inventor Charles Raymond Davis

Charles Raymond Davis 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 system for detecting a change in a rotational velocity of a magnetic disk or a spindle coupled to the magnetic disk
    Patent number: 7605996
    Abstract: A method according to one embodiment comprises detecting a change in a rotational velocity of a magnetic disk or a spindle coupled to the magnetic disk, the change being caused by head-disk contact. A method for detecting head-disk contact according to another embodiment comprises measuring a rotational velocity of a magnetic disk or a spindle coupled to the magnetic disk; detecting a change in the rotational velocity, the change being caused by head-disk contact; and correlating the change in rotational velocity with the head-disk contact.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: October 20, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Peter Michael Baumgart, Charles Raymond Davis, Gary Allan Herbst, Bernhard E. Knigge, Charles Mathew Mate, Bruce Alexander Wilson
  • METHOD AND SYSTEM FOR DETECTING A CHANGE IN A ROTATIONAL VELOCITY OF A MAGNETIC DISK OR A SPINDLE COUPLED TO THE MAGNETIC DISK
    Publication number: 20090168221
    Abstract: A method according to one embodiment comprises detecting a change in a rotational velocity of a magnetic disk or a spindle coupled to the magnetic disk, the change being caused by head-disk contact. A method for detecting head-disk contact according to another embodiment comprises measuring a rotational velocity of a magnetic disk or a spindle coupled to the magnetic disk; detecting a change in the rotational velocity, the change being caused by head-disk contact; and correlating the change in rotational velocity with the head-disk contact.
    Type: Application
    Filed: December 28, 2007
    Publication date: July 2, 2009
    Inventors: Peter Michael Baumgart, Charles Raymond Davis, Gary Allan Herbst, Bernhard E. Knigge, Charles Mathew Mate, Bruce Alexander Wilson