Fluid dynamic bearing system

US7866889B2 · kind B2 · utility

Assignee

• Minebea Co., Ltd. · JP

Inventor

• Olaf Winterhalter · Epfendorf, DE

Key dates

• Filing date: Feb 1, 2007
• Grant date: Jan 11, 2011
• Expiry date: Oct 11, 2028

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16C2370/12
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A fluid dynamic bearing system used particularly for a spindle motor having a shaft that is accommodated in a bearing bush and rotatably supported with respect to the bearing bush, a bearing gap filled with a bearing fluid being located between the shaft and the bearing bush. At least the outside circumference of a section of the shaft extending into the bearing bush is made of a plastic material. As an alternative, a film made of a plastic material whose thickness is less than the width of the bearing gap can be disposed in the bearing gap.