Patent · US Expired

Hydrodynamic bearing for a spindle motor

US7001073B2 · kind B2 · utility

3Cited by

16References

9Claims

0Family size

Assignee

Minebea Co., Ltd. · JP

Inventors

Joerg Hoffmann · Mettlach, DE
Olaf Winterhalter · Epfendorf, DE
Martin Hafen · Colmar, FR

Key dates

Filing date	Feb 28, 2003
Grant date	Feb 21, 2006
Priority date	—
Expiry date	Feb 28, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16C2370/12
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

Hydrodynamic bearing for use in a spindle motor includes a shaft, a bearing sleeve encompassing the shaft with a small radial clearance, a plurality of hydrodynamic pressure generating grooves formed on at least one of an outer surface of the shaft and an inner surface of the bearing sleeve, and a base-plate, flange or another frame element of the motor. The bearing sleeve is constructed as a single component with the frame element of the motor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.