Appeal No. 2004-2071
Application No. 09/893,109
THE INVENTION
The invention relates to “roller chains for use in
motorcycles as a power transmission drive, and more particularly
to such a low noise roller chain, which is cable of reducing
noises, generated when the chain engages a sprocket”
(specification, page 1). Representative claim 1 reads as
follows:
1. A low noise roller chain comprising:
inner and outer links alternately arranged and articulately
connected together in a longitudinal direction of the roller
chain,
the inner links each having a bushing and a pair of inner
plates connected to opposite ends of the bushing, respectively,
the outer links each having a pin and a pair of outer plates
connected to opposite ends of the pin, respectively, the pin
extending through the bushing; and
a rigid roller made of metal and an elastic roller made of
elastic material that are arranged end to end and fitted on the
bushing so as to jointly form a roller assembly,
the elastic roller having a width along an axis of the
roller assembly, which is 13 to 45% of an overall width of the
roller assembly along the axis thereof, and
the elastic roller having a uniform thickness throughout the
width thereof, the thickness of the elastic roller being larger
than a thickness of the rigid by 5 to 25% of the thickness of the
elastic roller.
2
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