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US 8,616,084 B2Granted
Bicycle crank arm assembly
AssigneeCampagnolo S.r.l.
InventorMario Meggiolan
Life of this patent
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AssigneeCampagnolo S.r.l.
InventorMario Meggiolan
Estimating the term…
A bicycle crank arm assembly is provided having at least one axle portion, a crank arm mounted on the at least one axle portion, the crank arm having a coupling seat and the axle portion a coupling portion coupled to the coupling seat, the coupling seat and the coupling portion being shaped so as to make a shape coupling to ensure that the crank arm can transmit a torque to the axle portion. Between the crank arm and the axle portion adhesive material is applied. The shape coupling ensures that the crank arm and the axle portion are integral in rotation, whereas the gluing ensures the sealing of the coupling area against corrosion phenomena. The gluing also ensures a predetermined minimum force limit necessary to disassemble the crank arm assembly. The crank arm assembly has a low overall weight, a simple assembly process, and a suitable resistance to disassembling.
Bicycle axle and crank arm assembly, comprising:
Method for assembling a crank arm to an axle portion of a bottom bracket assembly of a bicycle transmission, comprising providing the crank arm and the axle portion with mating coupling shapes that ensure that the crank arm transmits torque to the axle portion, inserting the axle portion into a coupling seat of the crank arm until an axial end surface of the axle portion abuts a shoulder on the coupling seat of the crank arm, and applying adhesive material in the coupling seat of the crank arm between the crank arm and the axle portion wherein the adhesive material is applied in a gluing chamber, formed in at least one of the crank arm and the axle portion.
Dependencies are inferred from the claim text.