The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 01, 2005
Filed:
Dec. 20, 2002
Martin Hafen, Villingen-Schwenningen, DE;
Jorg Hoffmann, Mettlach, DE;
Andreas Kull, Villingen-Schwenningen, DE;
Mathias Wildpreth, Villingen-Schwenningen, DE;
Martin Hafen, Villingen-Schwenningen, DE;
Jorg Hoffmann, Mettlach, DE;
Andreas Kull, Villingen-Schwenningen, DE;
Mathias Wildpreth, Villingen-Schwenningen, DE;
Minebea Co., Ltd., , JP;
Abstract
A hydrodynamic bearing system for use in a spindle motor, especially for the actuation of hard disk drives, wherein the bearing arrangement features a shaft and a sleeve which, supported by a lubricant circulating between their bearing surfaces, are rotatable relative to one another. A reservoir for the lubricant is formed by a recess provided in the shaft and the inner surface of the sleeve. The reservoir is provided in the area of the face of at least one opening in the sleeve. To enable the fill level of the lubricant in the reservoir to be checked, the recess is provided with tapering transitional areas contours of which form an acute angle with the cutting plane of the shaft.