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:
Jun. 17, 2008
Filed:
Oct. 27, 2005
Seiji Shimizu, Aichi-ken, JP;
Tomokazu Sonozaki, Aichi-ken, JP;
Seiji Shimizu, Aichi-ken, JP;
Tomokazu Sonozaki, Aichi-ken, JP;
NTN Corporation, Osaka, JP;
Abstract
Disclosed is an oil-impregnated sintered bearing in which local relative sliding between the oil-impregnated sintered bearing and the shaft is avoided, thereby mitigating stress concentration on the bearing surface of the oil-impregnated sintered bearing. An oil-impregnated sintered bearingwhich has in its inner periphery a bearing surfacemaking relative sliding with the outer peripheral surfaceof a shaftand which has at both axial ends of the bearing surfacecrowning portionswhich are of a configuration satisfying the following conditions: 1.75×10≦γ/b5.2×10, and 1.75×10≦γ/b≦5.2×10, and 0.2≦(bb)/a≦0.8, where γ is the maximum radial drop amount of the crowning portions, bis the axial length of the crowning portionat one axial end; bis the axial length of the crowning portionat the other axial end; and a is the total axial length of the oil-impregnated sintered bearing