Patent ID: 6019017
Filing Date: 2000-02-01
Classification: B60D,B62K,Y10T

Abstract:
An upper headset assembly for a bicycle which has a head tube (60) with a fork stem (30) extending through the head tube (60), a lower headset assembly (20) connected between the lower end of the head tube (60) and the fork stem (30), said upper headset assembly (10) connected between the upper end of the head tube (60) and the fork stem (30), said upper headset assembly comprising:a race member (11) having a neck (12) adapted to insert between the head tube (60) and the fork stem (30), and an annular groove (110) defined in the top of said race member (11) for a bearing (13) being received therein, a ring member (14) mounted to said bearing (13) on the outer periphery thereof and having a first tapered surface (142) defined in the inner periphery thereof;a pressing ring means (16) having a second tapered surface (164) and a third tapered surface (163), said second tapered surface (164) contacting said first tapered surface (142) of said ring member (14), anda collar (15) mounted to said pressing ring means (16) and having a plurality of holes (152) defined therethrough, each of said holes (152) having a bolt (153) extending therethrough and applying a force to said pressing ring means (16) to press said ring member (14) onto said bearing (13),wherein said pressing ring means (16) includes a first ring (161) having said third tapered surface (163) defined in the outer periphery thereof, a second ring (162) having said second tapered surface (164) defined in said outer periphery thereof and a biasing ring (165) biasedly clamped between said first ring (161) and said second ring (162).