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:
Aug. 26, 2008
Filed:
May. 18, 2004
Hiromichi Takemura, Kanagawa, JP;
Masanao Sato, Kanagawa, JP;
Hiromichi Takemura, Kanagawa, JP;
Masanao Sato, Kanagawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
A cylindrical roller bearing includes an inner ring having a flange portion provided with a roller guide-surface which guides the end facesof the cylindrical rollers having diameter of Da. The end faceaway from a center axis of the cylindrical roller by 0.40 Da in the radial direction is a first position A, and the end faceaway from the center axis by 0.35 Da is a second position B, the end facecontacts with the roller guide-surface between the first and second positions A and B, the end facehas a convex-shaped crowning portionhaving a continuous curve which passes the first and second positions A and B, and an angle α formed between a line connecting the first and second positions A and B and a line perpendicular to the center axis is set to be 0.5° or less.