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US 6,443,865 B1Granted
Bicycle front chainwheel assembly
AssigneeShimano Inc.
InventorMasahiro Yamanaka
Life of this patent
Estimating the term…
Abstract
A bicycle front chainwheel assembly is provided that includes a protective cover. The front chainwheel assembly basically includes a crank arm, one or more chainrings and the protective cover. The crank arm includes a hub portion, a crank portion and four fastening finger portions. The free ends of the fastening finger portions are provided with chainring attachment points for attaching the cover thereto. The cover is attached to the fastening finger portions by fasteners that have a shaft extending substantially perpendicular to the axis of rotation of the front chainwheel assembly.
Claims9
A bicycle front chainwheel assembly comprising:
- a gear portion configured to be coupled to a bottom bracket for rotation therewith about an axis of rotation, said gear portion having a plurality of cover attachment portions extending axially outwardly from said gear portion to free ends;
- and
- a cover having mounting portions coupled to said cover attachment portions by fasteners having a shaft portion extending substantially perpendicular to said axis of rotation.
Dependencies are inferred from the claim text.