Back to results
US 6,475,110 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 chain ring 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.
Claims20
A bicycle front chainwheel assembly comprising:
- a hub portion configured to be coupled to a bottom bracket for rotation therewith about an axis of rotation;
- a crank portion having an inner end coupled to said hub portion and an outer free end adapted to be coupled to a pedal;
- and
- a plurality of fastening finger portions extending radially outwardly from said hub portion to free ends, each of said fastening finger portions having a chainring attachment point;
- and
- a cover adjustably coupled to said fastening finger portions by fasteners having a shaft portion extending substantially perpendicular to said axis of rotation, said cover having a rear surface with a plurality of fastener portions and a discontinuous annular rim portion extending axially outward from said rear surface in a direction generally parallel to said axis of rotation, said discontinuous rim portion having a plurality of access openings located radially outwardly of said fastener portions and substantially radially align with said fastener portions.
3 more elements
Dependencies are inferred from the claim text.