Patents by Inventor Holavanahally S. Nagaral

Holavanahally S. Nagaral 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).

  • Patent number: 5641841
    Abstract: An improved disk drive system using a non-ferrofluid conductive lubricant is disclosed. In the disk drive system, there is a plurality of critically spaced magnetic disks rotated by a disk motor. A spindle shaft, which is retained by the spindle sleeve, couples to the disk motor and to the plurality of magnetic disks for rotation. The spindle shaft and spindle sleeve uses a bearing, which is lubricated by a non-ferrofluid conductive lubricant. The lubricant is used to prevent electrostatic charge build up during operation of the disk drive system. The lubricant may be either a non-polar oil or a ball bearing grease and further comprising either a metal caged fullerenes compound, STADIS-450, ASA-3, or Polyfloe 130. One particular type of lubricant is an emeraldine salt of polyanilin produced according to the steps of first reacting a solution of HCL and ammonium persulfate into a solution of HCL and analine to form a polymer.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 24, 1997
    Assignee: International Business Machines Corporation
    Inventors: Arthur Fred Diaz, Robert D. Johnson, Thomas Edward Karis, Holavanahally S. Nagaral, My Thanh Nguyen