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. 14, 2006
Filed:
May. 27, 2004
Yoshiro Ide, Kanagawa, JP;
Masatake Ichimaru, Kanagawa, JP;
Yukio Ooura, Kanagawa, JP;
Yuko Kamamura, Kanagawa, JP;
Yoshiro Ide, Kanagawa, JP;
Masatake Ichimaru, Kanagawa, JP;
Yukio Ooura, Kanagawa, JP;
Yuko Kamamura, Kanagawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
A roller bearing includes an inner ring, an outer ring, a plurality of cylindrical rollers each provided between rolling contact surfaces of the inner ring and the outer ring. Each of the cylindrical rollers includes an end face having a peripheral part that is crowned. A flange portion is formed at an outer circumferential face end part of the inner ring and/or an inner circumferential face end part of the outer ring. The peripheral part is crowned in a curving shape represented by an exponential function of y=a·exp(−b·x); where a and b are constants, x is a distance from the rolling contact surface in a radial direction of the cylindrical roller, and y is a crowning fall-off amount from a central part of the end face of the cylindrical roller in an axial direction of the cylindrical roller.