Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Isamu Okabe0
Tomotaka Koga0
Date of Patent
July 17, 2007
Patent Application Number
10774650
Date Filed
February 6, 2004
Patent Primary Examiner
Patent abstract
In a roller chain transmission, the diameter D of the rollers, the outer diameter d of the pins and height H of the inner plates satisfy the relationships 0.72P≦D≦0.79P, 0.40P≦d≦0.44P, and 0.96P≦H, with respect to the chain pitch P. The sprocket teeth are asymmetric in that the chain entering side and the chain leaving side differ, and the radius R1 of an arc of the tooth gap bottom, the radius R2 of the chain entering side tooth flank and the radius R3 of the chain entering side tooth head portion satisfy the relationships 0.505D≦R1≦0.505D+0.069D, P−(0.505D+0.069D)≦R2≦P−0.505D, and 0.08≦R3≦0.13P. The transmission chain exhibits improved endurance and quietness, smooth operation, and resistance to elongation due to wear.
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