Patent ID: 8070633

Claim:
A bottom bracket assembly in a bottom bracket portion of a bicycle frame requiring one bottom bracket assembly for the bicycle frame, said bottom bracket assembly comprising: (a) a body member having a longitudinal axis for mounting within the bicycle frame and for receiving a pedal shaft, said body member having: at least two wing surfaces on said body member that are internally located and parallel with respect to the longitudinal axis of said body member; a bore comprising substantially the entire hollow inner cylinder portion of said bottom bracket assembly and having an axis parallel to the longitudinal axis of said body member to receive the pedal shaft; and a first cylindrical external surface located immediately beneath an inner surface of a shell of the bicycle frame; (b) at least a first wing member and a second wing member that are separate structures from said body member, said first wing member and said second wing member having an axis parallel to the first cylindrical external surface of the body member, said first and second wing members each having: a wing surface for cooperation with one of said at least two wing surfaces of the body member; and a wedge surface located to cooperate with a wedge driver, said wedge driver further comprising at least two wedge members located between said first and second wing members; and a second cylindrical external surface located immediately beneath the inner surface of the shell of the bicycle frame; whereby, when said wedge driver is rotated, said at least two wedge members are laterally displaced co-acting with said first and second wing members to circumferentially expand away from said body member such that the cylindrical external surfaces of said assembly are engageable with the inner surface of the shell of the bicycle frame.