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. 23, 1999
Filed:
Sep. 18, 1996
Masaaki Nakano, Hitachi, JP;
Takashi Kono, Ibaraki-ken, JP;
Kenji Tomida, Ibaraki-ken, JP;
Tomoaki Inoue, Mito, JP;
Hiroshi Nishida, Kanagawa-ken, JP;
Yuji Nishimura, Odawara, JP;
Takeru Sato, Ashikaga, JP;
Sachio Hatori, Kiryu, JP;
Hitachi, Ltd., Tokyo, JP;
Japan Servo Co., Ltd., Tokyo, JP;
Abstract
A bearing device where a sliding bearing rotatably supporting a shaft is molded with an inexpensive sintered material, three asymmetrical circular arc-shaped radial bearings are formed in the inner peripheral surface of the shaft, taper land-shaped thrust bearings are formed in the opposite end surfaces of the radial bearing surface, T-shaped bubble removing means which is constituted by axial and radial flow passages formed in the shaft opposed to the radial bearing is provided, and magnetic fluid is used as a lubricant. A magnetic disk unit using the bearing device is also disclosed.