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. 12, 2012
Filed:
Apr. 13, 2009
Tomohiro Ukai, Inuyama, JP;
Atsushi Okado, Inuyama, JP;
Osamu Ishigo, Inuyama, JP;
Daido Metal Co., Ltd., Nagoya, JP;
Abstract
A sliding bearing has a pair of semi-cylindrical bearings assembled together to form a cylindrical configuration. At least one of the semi-cylindrical bearings is provided with an inner surface circumferentially extending oil groove extending a central portion of the circumferential length of the semi-cylindrical bearing. A bottom surface of the oil groove has an ups and downs form consisting of a plurality of ridges and valleys, which sinusoidally undulate consecutively without a flat portion therebetween. The dimensional relationship between a typical ridge and the adjacent valleys is defined by the formula h<0.15H where H indicates the groove depth and h indicates an elevation difference of the ups and downs of the bottom surface, namely a height of the ridges where h is preferably not less than 10 μm.