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US 2014/0109722 A1Published application
Bottom bracket assembly of a bicycle and left crank arm assembly thereof
AssigneeCampagnolo S.r.I.
InventorsGiuseppe Dal Prà, Nicola Sgreva
Life of this patent
Estimating the term…
Abstract
A bicycle bottom bracket assembly that reduces the accumulation of dirt and/or corrosive substances inside the shaft extending between the crank arms of the assembly. The bottom bracket assembly includes a shaft having a through-cavity that extends along its longitudinal direction; a crank arm is associated with each end portion of the shaft, and the through-cavity extends unobstructed through the crank arms and the shaft.
Claims21
A bicycle bottom bracket assembly comprising:
- a shaft having an longitudinal axis (X-X) extending between the shaft's end portions;
- a left crank arm associated with a first end portion of said shaft;
- a right crank arm associated with a second end portion of said shaft;
- and,
- a through-cavity that extends unobstructed along said longitudinal axis through the crank arms and said shaft.
2 more elements
Left crank arm assembly of a bicycle, comprising:
- a shaft having an axis (X-X) extending along a longitudinal direction;
- a left crank arm associated with a first end portion of said shaft;
- wherein said left crank arm is axially blocked with respect to said first end portion of said shaft by a ring nut acting in abutment on said left crank arm and screwed onto an external threading formed on said first end portion of said shaft.
Bottom bracket assembly of a bicycle, comprising:
- a shaft having an axis (X-X) extending along a longitudinal direction;
- a pair of crank arms, each one associated with a respective end portion of said shaft;
- a pair of bearings that support said shaft in rotation with respect to a housing box of the bottom bracket assembly provided in a bicycle frame;
- an adjuster for adjusting the axial position of at least one crank arm of said pair of crank arms with respect to said pair of bearings, wherein said adjuster is axially arranged between said at least one crank arm of said pair of crank arms and a respective bearing of said pair of bearings,
- wherein said adjuster comprises:
- a first service ring nut in axial abutment with said respective bearing;
- a second service ring nut coupled with said first service ring nut and in axial abutment with said at least one crank arm of said pair of crank arms;
- a position lock for fixing the axial position of said second service ring nut with respect to said first service ring nut.
5 more elements
Dependencies are inferred from the claim text.