Patent ID: 6443033
Filing Date: 2002-09-03
Classification: B62M,Y10T

Abstract:
A two-piece crankset, comprising a pair of crankarm-spindle portions, each having a hollow crankarm portion with a free end adapted to engage a pedal, and a bent end, and a spindle portion continuous with the bent end, wherein the spindle portions of each of the pair of crankarm-spindle portions comprise a disc-shaped spindle plate and a spindle, the spindle comprising tubular sections with flattened planar ends, the flattened planar ends adapted to abut opposing surfaces of said spindle plate, and wherein each crankarm-spindle portion has an engagement means on the spindle portion adapted to engage with the other spindle portion, so that the spindle portions can be detachably yet rigidly attached together, and wherein the engagement means comprises at least one protrusion on a flattened planar end of one of the spindle portions, the at least one protrusion being adapted to fit into at least one complementary aperture formed on a flattened planar end of the other of the spindle portions of the pair of crankarm-spindle portions, and a bolt to hold the spindle portions in rigid interconnection wherein the tubular section and flattened planar ends are metallic, and the crankarm portion and a portion of the spindle portion which engage the tubular section comprise composite materials, the metallic tubular sections being bonded with an adhesive to the composite materials of the spindle portion.