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:
Oct. 25, 2005
Filed:
Aug. 23, 2002
Yu Yong Wang, Singapore, SG;
Gui Rong Liu, Singapore, SG;
Chun LU, Singapore, SG;
Kwang Peng Quek, Singapore, SG;
Yoshihisa Noguchi, Shiga, JP;
Yu Yong Wang, Singapore, SG;
Gui Rong Liu, Singapore, SG;
Chun Lu, Singapore, SG;
Kwang Peng Quek, Singapore, SG;
Yoshihisa Noguchi, Shiga, JP;
Institute of High Performance Computing, Singapore, SG;
Sunstar Logistic Singapore Pte Ltd., Singapore, SG;
Abstract
An improved tooth profile for a roller chain sprocket enables noise reduction from impact and polygonal action during the meshing process. The profile of the engaging flank consists of three portions which are the seating, impact and distal portions all three of which are arcs with well-defined radii and arc centers. The profile of the disengaging flank is determined in accordance to a modified form of the JIS standard in which the sprocket pitch is smaller than the roller chain pitch. The impact point is located at the tangent point, thus permitting a gradual change of the roller velocity, thereby lessening the impact level and the effects of polygonal action.