| Patent Number |
Title Of Patent |
Date Issued |
| 6583952 |
In-hub spindle motor with separate fluid dynamic bearings |
June 24, 2003 |
| A hydrodynamic bearing system where the bearing includes a shaft and two independent bearings, including a top cone or bi-sphere and a bottom cone or bi-sphere separated by a segment of the shaft. The bearing includes a hub supported bearing element rotating around the shaft and the shaf |
| 6296390 |
Single plate hydrodynamic bearing with extended single journal bearing |
October 2, 2001 |
| A hydrodynamic bearing having a shaft relatively rotatable with rest to a surrounding sleeve and having a thrust plate of or near one end thereof. The shaft and sleeve define a journal bearing extending substantially the full length of the two relatively rotating parts. |
| 6280088 |
Crowned conical bearing |
August 28, 2001 |
| A bearing assembly including a bearing cone (50) having a crowned bearing surface (56) with V-shaped grooves (60) that are shallow at their apex (62) and deepest at the outer edges (52, 54). When mated with a female bearing seat, lubricating fluid builds up along the midline of the beari |
| 6144523 |
Simplified conical bearing with independent flow paths |
November 7, 2000 |
| A hydrodynamic bearing useful as a bearing cartridge or as the cartridge may be incorporated into a spindle motor or the like, where the bearing includes a stationary shaft and two independent bearings, comprising a top cone and a bottom cone separated by a segment of the shaft. The bear |
| 6118620 |
In-hub spindle motor with separate fluid dynamic bearings |
September 12, 2000 |
| A hydrodynamic bearing system where the bearing includes a shaft and two independent bearings, comprising a top cone or bi-sphere and a bottom cone or bi-sphere separated by a segment of the shaft. The bearing includes a hub supported bearing element rotating around the shaft and the sha |
| 6065877 |
Thermal compensation for fluid dynamic bearing using bimetal parts |
May 23, 2000 |
| A bimetallic part is formed from metals or comprises metals with different thermal expansion coefficients. A first element defines the part and defines one surface of the bearing gap and has a first coefficient of expansion and a second element is wholly or partially inserted into and |
| 6019516 |
Crowned conical bearing |
February 1, 2000 |
| A bearing assembly including a bering cone (50) having a crowned bearing surface (56) with V-shaped grooves (60) that are shallow at their apex (62) and deepest at the outer edges (52, 54). When mated with a female bearing seat, lubricating fluid builds up along the midline of the bearin |
| 5946958 |
Device for manufacturing a groove bearing |
September 7, 1999 |
| An apparatus for forming grooves in the surface of an article is disclosed. The apparatus includes a cage which has a circular cage wall with an annular pattern of holes in the wall. The apparatus also includes a plurality of spherical balls, each rotatably disposed in a respective hole |
| 5940246 |
Disc drive hydro bearing lubricant with electrically conductive, non-metallic additive |
August 17, 1999 |
| 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 mem |
| 5793129 |
Low distortion interference fits for spindle motor assembly |
August 11, 1998 |
| For a precision spindle motor, an invention for reducing distortion resulting from interference fits of a thrust plate to spindle motor shaft and of a counter plate to a journal. A method of assembly according to the invention includes the step of balancing an interference pressure about |
| 5666716 |
Low distortion interference fits for spindle motor assembly |
September 16, 1997 |
| For a precision spindle motor, an invention for facilitating interference fits of a thrust plate to spindle motor shaft and of a counter plate to journal. A method is provided for assembling a spindle motor using press fits of a thrust plate to a shaft having an undercut for providing a |
