Patent ID: 7607507
Filing Date: 2009-10-27
Classification: B62M

Abstract:
1. A bicycle comprising: a left bearing having a first beveled surface; a right bearing having a first beveled surface; a frame including a bottom bracket shell, the bottom bracket shell defining a crank rotating axis, a left side portion and a right side portion, the left side portion of the bottom bracket shell having a first beveled surface sized and configured to receive the first beveled surface of the left bearing, the right side portion of the bottom bracket shell having a first beveled surface sized and configured to receive the first beveled surface of the right bearing; a spindle disposable through the bottom bracket shell, the left bearing and the right bearing, the spindle defining a central axis; a right crankarm attached to the right side portion of the spindle; a left crankarm attached to the left side portion of the spindle; wherein the left and right bearings are pre-loaded such that the left bearing first beveled surface contacts the first beveled surface of the shell left side portion and the right bearing first beveled surface contacts the first beveled surface of the shell right side portion thereby aligning the central axis of the crankshaft to the spindle central axis, the left and right bearings being pre-loaded to an extent that the left and right crankarms do not bind or wobble when rotated.