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. 08, 2005
Filed:
Feb. 06, 2003
Applicants:
Toshikazu Takehana, Ibaraki, JP;
Hidekazu Tokushima, Kashiwa, JP;
Hideo Shikata, Matsudo, JP;
Katsutoshi Nii, Hitachi, JP;
Jun Hirose, Nagano, JP;
Inventors:
Toshikazu Takehana, Ibaraki, JP;
Hidekazu Tokushima, Kashiwa, JP;
Hideo Shikata, Matsudo, JP;
Katsutoshi Nii, Hitachi, JP;
Jun Hirose, Nagano, JP;
Assignees:
Hitachi Powdered Metals Co., Ltd., Chiba, JP;
Minebea Co., Ltd., Nagano, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C032/06 ; B23P015/00 ;
U.S. Cl.
CPC ...
Abstract
A bearing unit comprises a bearingformed of a sintered metal in which a magnetized magnetic powder is dispersed in its matrix and at least pores exposed on a bearing surface thereof are sealed by impregnation with a resin; a non-magnetic housingaccommodating the bearing; and a lubricating fluid M made of a magnetic fluid.