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:
Jul. 02, 2002
Filed:
Jul. 06, 2000
Tsubakimoto Chain Co., Osaka, JP;
Abstract
A power transmitting mechanism includes a first silent chain trained around teeth of a first driving sprocket and a teeth of first driven sprocket, and a second silent chain trained around teeth of a second driving sprocket and teeth of a second driven sprocket. The first and second driving sprockets are mounted in parallel relationship on a single drive shaft, and the teeth of the first driving sprocket are offset from the teeth of the second driving sprocket by one-half pitch. The pitch of the driving sprockets is a random pitch which varies in a random pattern along the circumference of the sprockets. The silent chains have a single pitch. By thus phasing the two driving sprocket, periodic meshing impact sounds emitted from the respective silent chains are canceled out or offset each other. The periodicity of the meshing impact sound is agitated by the random tooth pitch of the driving sprockets to such an extent that resonance sound is sufficiently reduced.