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:
Mar. 19, 2013
Filed:
Jun. 14, 2010
Taketo Nonaka, Shizuoka, JP;
Toshiki Maeda, Shizuoka, JP;
Taketo Nonaka, Shizuoka, JP;
Toshiki Maeda, Shizuoka, JP;
Alphana Technology Co., Ltd., Shizuoka, JP;
Abstract
A bearing unit for a disk drive device is formed by a sleeve concave portion and a shaft concave portion, and is provided with a capillary seal portion in which the gap between the sleeve concave portion and the shaft concave portion is increased in diameter toward the hub side of the sleeve. Assuming that: the outer circumferential diameter at the tilt starting end on the base member side of the shaft concave portion is D; the inner circumferential diameter at the tilt starting end on the hub side of the sleeve concave portion is D; the facing outer circumferential diameter of the shaft concave portion, which faces, in the radial direction, the inner circumference at the tilt starting end of the sleeve concave portion, is D; and the diameter of the most concave inner circumference of the sleeve concave portion is D, Dis smaller than D, Dis larger than D, and the difference between Dand Dis larger than that between Dand D