Endless belt power transmission systems or components – Positive drive pulley or guide roll – And additional coaxial surface for engaging same belt in...
Reexamination Certificate
2006-02-28
2006-02-28
Johnson, Vicky A. (Department: 3682)
Endless belt power transmission systems or components
Positive drive pulley or guide roll
And additional coaxial surface for engaging same belt in...
C474S152000
Reexamination Certificate
active
07004867
ABSTRACT:
A rear sprocket assembly has a plurality of sprockets with the smallest sprocket being a top or first sprocket. At least one of the teeth is a down shift tooth that has a recessed side surface to assist in shifting the chain to the next larger sprocket. Preferably, all of the teeth of the top sprocket are identical. The sprocket body of the top sprocket is threaded to be coupled to a freewheel or hub. A second sprocket is located adjacent the top sprocket and preferably cooperates with the top sprocket during a down shift from the top sprocket to the second sprocket. The second sprocket cooperates with a third sprocket during a down shift from the second sprocket to the third sprocket.
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Johnson Vicky A.
Shimano Inc.
Shinjyu Global IP Counselors, LLP
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