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. 14, 2012
Filed:
May. 21, 2009
Martin Bauer, Villingen-Schwenningen, DE;
Martin Bauer, Villingen-Schwenningen, DE;
Minebea Co., Ltd., Nagano-ken, JP;
Abstract
The invention relates to a fluid dynamic bearing system having a first conical bearing and a second conical bearing working in opposition to the first conical bearing, the conical bearings being disposed along a stationary shaft. The first conical bearing has a first bearing cone disposed on the shaft having bearing surfaces extending at an angle α to the rotational axis, and a first bearing bush having a tapered bearing bore and bearing surfaces that are separated by a first bearing gap filled with bearing fluid from the bearing surfaces of the first bearing cone. The second conical bearing has a second bearing cone disposed on the shaft having bearing surfaces extending at an angle β to the rotational axis, and a second bearing bush having a tapered bearing bore and bearing surfaces that are separated by a second bearing gap filled with bearing fluid from the bearing surfaces of the second bearing cone. According to the invention, the bearing surfaces of the first conical bearing are smaller in surface area than the bearing surfaces of the second conical bearing and the angle α is greater than the angle β.