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:
Dec. 08, 2015
Filed:
Jul. 12, 2012
Akio Kato, Iwata, JP;
Shinji Oishi, Iwata, JP;
Akio Kato, Iwata, JP;
Shinji Oishi, Iwata, JP;
NTN CORPORATION, Osaka, JP;
Abstract
The present invention is to suppress wear of outer diameter surfaces of chain guiding rollers () in a chain guide and extend the life. Respective shaft ends of a plurality of roller shafts () are supported by pairs of facing side plate portions () of guide bases () arranged to face each other in a one-side part of a timing chain () for transmitting torque. Each of the rollers () formed by a plurality of chain guiding roller bearings is rotatably supported by each of the plurality of roller shafts (). Rollers whose surface hardness is greater than surface hardness of the timing chain () by 4 points or more of Rockwell hardness are used as the rollers (), so as to prevent earlier wear of the outer diameter surfaces of the rollers () due to contact with the timing chain ().