Patent ID: 8292316
Filing Date: 2012-10-23
Classification: B62K

Abstract:
1. A set of angle-adjusting head parts, comprising a set of upper head parts and a set of lower head parts respectively mounted on top and bottom ends of a bicycle's head tube that holds a front fork stem that supports a handlebar stem, said set of upper head parts comprising: an upper bearing cup, said upper bearing cup comprising an axially extending oval slot, which has a major axis and a minor axis, an arched surface, and two retaining surfaces respectively located on two opposite inside lateral walls thereof in a parallel manner relative to said major axis of said oval slot; an upper bearing mounted in said upper bearing cup, said upper bearing comprising a top rim, and an eccentric slot surrounded by said top rim for the insertion of said front fork stem and reducing gradually downwardly from said top rim and terminating in an eccentric seat adapted for engaging into said oval slot of said upper bearing cup for stopping against said retaining surface; and an adjusting washer mounted on said upper bearing cup and movable relative to said upper bearing cup along the minor axis of said oval slot, said adjusting washer having a circular opening defined therein and adapted for attaching to said upper bearing for enabling said upper bearing to be rotatably received in said adjusting washer; wherein rotating said upper bearing forces said eccentric seat to stop against said retaining surfaces and to further synchronously move said adjusting washer along said major axis of said oval slot, thereby correcting the position of the central axis of said eccentric slot and biasing the angle of said front fork stem.