Endless belt power transmission systems or components – Positive drive belt – Belt formed of rigid links
Reexamination Certificate
2007-07-17
2007-07-17
Charles, Marcus (Department: 3682)
Endless belt power transmission systems or components
Positive drive belt
Belt formed of rigid links
C474S206000
Reexamination Certificate
active
10774650
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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Roller Chain Transmission Device, U.S. Appl. No. 10/774,020, Isamu Okabe et al., filed Feb. 6, 2004, USA.
JIS Handbook Machine Elements, B1801, B1802, Japanese Standard Association, pp. 1586-1613, Apr. 20, 2005.
Koga Tomotaka
Okabe Isamu
Charles Marcus
Howson & Howson LLP
Tsubakimoto Chain Co.
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