Bicycle multi-gear cassette

Details Bicycle multi-gear cassette Bicycle multi-gear cassette

2011-06-14

2011-06-14

Siconolfi, Robert (Department: 3657)

Endless belt power transmission systems or components

Positive drive pulley or guide roll

And additional coaxial surface for engaging same belt in...

C474S077000, C474S078000, C474S152000, C474S156000, C474S158000, C474S164000

Reexamination Certificate

active

07959529

ABSTRACT:
A bicycle multi-gear cassette mountable to a wheel hub that generally includes a truncated conical shell and a plurality of toothed sprockets having different numbers of teeth. The shell includes a plurality of coaxial annular cylinders of variable diameter extending along an axis of the shell and a plurality of coaxial annular discs of variable diameter extending radially of the axis. The cylinders and discs are alternatingly arranged in a stepped sequence. The toothed sprockets are disposed on the shell and extend radially of the shell axis. At least one of the toothed sprockets includes a recess on a side facing an adjacent toothed sprocket having a smaller number of teeth. The recess includes a first region having a first depth and a second region having a second depth. The first depth is greater than the second depth. The shell and the plurality of toothed sprockets embody a single piece.

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Photograph of a plastic cassette cut in half, Circa 1996.

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