Disc drive hydro bearing lubricant with electrically conductive, non-metallic additive
AssigneeSeagate Technolog, Inc.
InventorsRaquib U. Khan, Samnathan Murthy, Norbert S. Parsoneault, Hans L. Leuthold
Life of this patent
Estimating the term…
Abstract
A disc drive data storage system according to the present invention includes a stationary member, a rotatable member and a hydro bearing which interconnects the stationary member and the rotatable member. At least one data storage disc is attached to and is coaxial with the rotatable member. The hydro bearing includes an electrically non-conductive lubricant and an electrically conductive, non-metallic additive.
Claims20
A disc drive data storage system, comprising:
- a housing;
- a central axis;
- a stationary member which is fixed with respect to the housing and coaxial with the central axis;
- a stator which is fixed with respect to the housing;
- a rotatable member which is rotatable about the central axis with respect to the stationary member;
- a rotor supported by the rotatable member and magnetically coupled to the stator;
- at least one data storage disc attached to and coaxial with the rotatable member;
- and
- a hydro bearing interconnecting the stationary member and the rotatable member and comprising an electrically conductive lubricant in liquid solution form, the electrically conductive lubricant comprising an electrically non-conductive base fluid and an electrically conductive, non-metallic additive.
A hydro bearing disc drive lubrication fluid for lubricating a hydro bearing in a disc drive, the fluid comprising:
- a base fluid which is electrically non-conductive;
- and
- an electrically conductive, non-metallic additive, wherein the hydro bearing disc drive lubrication fluid is in a liquid solution form.
A disc drive data storage system, comprising:
- a housing;
- a central axis;
- a stationary member which is fixed with respect to the housing and coaxial with the central axis;
- a stator which is fixed with respect to the housing;
- a rotatable member which is rotatable about the central axis with respect to the stationary member;
- a rotor supported by the rotatable member and magnetically coupled to the stator;
- at least one data storage disc attached to and coaxial with the rotatable member;
- and
- a hydro bearing interconnecting the stationary member and the rotatable member and comprising an electrically conductive lubricant in liquid solution form, the electrically conductive lubricant comprising an electrically non-conductive base fluid and an electrically conductive organic polymer additive which is non-metallic and non-magnetic and has a concentration in the lubricant of 100-5000 ppm.
Dependencies are inferred from the claim text.