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:
Oct. 14, 2008
Filed:
Dec. 28, 2005
Hisaya Nakagawa, Nagano, JP;
Michiaki Takizawa, Nagano, JP;
Toru Nakanishi, Nagano, JP;
Takeshi Kaneko, Nagano, JP;
Hisaya Nakagawa, Nagano, JP;
Michiaki Takizawa, Nagano, JP;
Toru Nakanishi, Nagano, JP;
Takeshi Kaneko, Nagano, JP;
Nidec Sankyo Corporation, Nagano, JP;
Abstract
A bearing unit comprises a cylindrical oil-impregnated bearing, in which a bearing bore to support a turning shaft is formed so as to enable the turning shaft to turn; a bearing holder, in which the oil-impregnated bearing is fixed by an inner bore; a first groove being formed in an axial direction on an inner circumferential surface of the oil-impregnated bearing; and a second groove being formed in an axial direction on at least one of an outer circumferential surface of the oil-impregnated bearing and an inner circumferential surface of the bearing holder. The second groove is formed so as to have a greater depth than that of the first groove. The second groove is also formed so as to have a larger cross section than that of the first groove.