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:
Jan. 03, 2023
Filed:
Aug. 16, 2019
Ntn Corporation, Osaka, JP;
Takashi Kawai, Shizuoka, JP;
NTN CORPORATION, Osaka, JP;
Abstract
A tapered roller bearing includes an inner ring having a tapered raceway surface and a large-collar surface on a large-diameter side of the raceway surface, and tapered rollers. Each of the rollers has a large end surface guided by the large-collar surface. When R represents a set curvature radius of the large end surface and Rrepresents a base curvature radius from a vertex of a cone angle of each of the tapered rollers to the large-collar surface, the base curvature radius Ris 100 mm or less, and a ratio R/Rof the set curvature radius R to the base curvature radius Ris set to 0.90 or less. When Rrepresents an actual curvature radius of the large end surface of each of the tapered rollers, a ratio R/R of the actual curvature radius Rto the set curvature radius R exceeds 0.5.