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. 23, 2010
Filed:
Aug. 28, 2006
Tomoaki Terada, Iwata, JP;
Kenichi Ichikawa, Iwata, JP;
Tomoaki Terada, Iwata, JP;
Kenichi Ichikawa, Iwata, JP;
NTN Corporation, Osaka, JP;
Abstract
The straightness and parallelism of a track surface on which rollers roll are measured within a range 'L' as a range for measuring the straightness and parallelism. The range 'L' is a range such that L≧0.8×L when a roller length is “L”. When the dimension from the corner P of the flange on the inner diameter side to the starting point of the range “L” is “L”, the dimension “L” is ranged such that 0.8 mm≦L≦2 mm. In this range, the straightness of the track surface of the outer ring in the axial direction is not more than 0.008 mm and the parallelism thereof is not more than 0.015 mm.