Abstract: A bearing assembly of a bottom bracket for a bicycle, the bottom bracket includes an axle, at least one bearing, a tube and a housing, the tube engaged in the housing and the axle rotatably engaged in the tube by at least one bearing disposed therebetween. The tube has at least one annular recess defined in an inner periphery thereof and the axle has a threaded portion for threadedly engaging to a race which has an annular recess defined in an outer periphery thereof. The bearing is received between the annular recess of the tube and the annular recess of the race, an abutment between the tube and the bearing defining a first arc on a vertical plane passing through a center of the bearing, the first arc having an upper distal point and a lower distal point, the upper distal point located in the first (or the second) quadrant of the vertical plane with regard to a right-angle coordinate which has an origin of ordinates at the center of the bearing.

Abstract: A hub of a bicycle includes a hub shell with two ends and an axle which rotatably extends through the hub shell, a dust cap threadedly engaged to each end of said hub shell, a bearing rotatably disposed between the axle and each of the dust caps, a tubular element mounted to the axle and located between two first flanges each of which extends radially and outwardly from the axle, the tubular element having a fourth groove defined in an outer periphery of at least one end thereof so as to form a first shoulder and a second shoulder wherein the first shoulder is located near a distal end of the tubular element and is received in the third groove of the corresponding dust cap, the second shoulder having a second flange extending inwardly and radially therefrom for contacting against the corresponding first flange of the axle.

Abstract: A structure of a bottom bracket includes a housing having first and second ends, each having a thread portion formed in an inner peripheral surface thereof, a tube having first and second ends, the first end thereof having a thread portion formed in an outer peripheral surface thereof for engagement to the thread portion of the first end of the housing, a tapered outer peripheral surface being formed on an outer peripheral surface of the second end of the tube, an axle rotatably extending through the tube with bearings being disposed therebetween and a cap having first and second ends, a thread portion being formed in an outer peripheral surface of the first end thereof for engagement to the second end of the housing, a tapered inner peripheral surface being formed on an inner peripheral surface of the first end of the cap for engagement to the tapered outer peripheral surface of the tube.

Abstract: A bottom bracket assembly includes a bottom bracket, a first bowl member having an outer threaded portion for engagement in an inner threaded portion of the bottom bracket, a flange portion formed on a distal end of the first bowl member, a second bowl member having an outer threaded portion for engagement in an inner threaded portion of the bottom bracket, a tube fixedly mounted in the bottom bracket and including a first end having an outer threaded portion for engagement in an inner threaded portion of the first bowl member and a second end having a tapered surface for urging on a tapered surface of the second bowl member, a second flange portion formed on the first end of the tube for abutting against the flange portion of the first bowl member, an axle rotatably mounted in the tube, a first ball bearing rotatably mounted between an annular recess of the first bowl member and an annular recess of the axle, and a second ball bearing rotatably mounted between an annular recess of the tube and an annular rec

Abstract: An upper steering assembly for a bicycle includes a head tube, a steerer tube passing through the head tube, a bearing assembly including a lower and an upper race, the upper race being a ring element and having a vertical inner peripheral surface, mounted on a top of the head tube and around the steerer tube, a rotational socket having a threaded inner periphery and including an upper clamping portion and a lower skirt portion which has an annular groove in an underside thereof for retaining the bearing assembly, the skirt portion having a vertical outer peripheral surface for engaging with the vertical inner peripheral surface of the upper race, and a compression socket mounted around the steerer tube and having a longitudinal slit and including an upper clamping section and a lower tubular section which is in threading connection with the inner periphery of the rotational socket.

Abstract: A hanger means for a wheeled vehicle comprises a fastening member which is adapted to be securely mounted above a head set of a wheeled vehicle, and a hanger which has first and second ends, a brake cable passes through the first end of the hanger and the second end of the hanger is pivoted to the fastening member allowing the hanger to be pivotable between a locked lower position and an unlocked upper position where said head set is accessible.

Abstract: A journal includes a cap engaged on a steerer tube, a bearing engaged on the cap, a compression nut threadedly engaged on the steerer tube, an annular flange extended upward from the compression nut, a pair of fins formed in the annular flange, and a split ring engaged on the annular flange. The split ring includes two half appendages fixed together to compress the fins radially inwards in order to compress the steerer tube, whereby, the compression nut is fixed to the steerer tube.

Abstract: An upper steering assembly for a bicycle includes a lower race mounted on an upper end of a head tube of a bicycle, an upper race above the lower race, ball bearings between the lower and upper races, a compression socket, a ratchet wheel, an outer socket, a compression ring, and an actuating socket. The steerer tube has a longitudinal groove on an upper section thereof. The compression socket is mounted around the steerer tube and has a longitudinal slit in alignment with the longitudinal groove. The ratchet wheel is mounted around the compression socket and has a protrusion projecting radially and inwardly through the slit and received in the longitudinal groove. The outer socket is mounted around the ratchet wheel and has a radial threaded through hole through which a bolt passes to abut on a tooth of the ratchet wheel, such that the ratchet wheel cannot rotate.

Abstract: A head set includes a sleeve threadedly engaged on a steerer tube, a ratchet gear engaged on the steerer tube and including a key extended radially inwards for engagement with the steerer tube, and a compression nut threadedly engaged on the steerer tube in order to compress the ratchet gear in place. The compression nut includes a screw threadedly engaged in a screw hole for engagement with the ratchet gear so that the compression nut is prevented from rotating in a reverse direction relative to the steerer tube.

Abstract: A coupling for securing a handlebar to a bicycle frame comprising a bowl engaged on a front fork of the bicycle frame, a compression nut threadedly engaged on the front fork and including an annular groove formed in an upper portion thereof, and a sealing ring including a lower portion engaged in the annular groove of the compression nut and including an annular ring formed in an upper portion thereof for engagement with the front fork in order to form a seal with the front fork.

Abstract: A coupling for supporting an extension of a front fork in a head tube of a bicycle includes a bowl engaged in an upper portion of the head tube and includes a tapered surface. A ring element engages between the tapered surface of the upper bowl and the extension. A barrel engages on the ring element and a disc engages on the barrel. A fixed device engages in the extension with a bolt between the disc and the fixing device for pressing the barrel downward in order to press the ring element in place.

Abstract: A coupling for securing a handlebar stem on a front fork including a tube engaged on the upper end of the front fork, a shank fixed on the tube, an opening formed in the shank close to the tube, the tube including a pair of panels, a lug extended from each of the panels, and a bolt engaged between the lugs for coupling the lugs together in order to fix the tube on the front fork.

Abstract: A hub of a bicycle including a hub shell having a tapered surface formed in each end, an axle disposed in the hub shell, two bearings engaged on the axle, a tube engaged on the bearings and having a cone formed on one end, the cone having a tapered surface engaged with one of the tapered surfaces of the hub shell, and a cap threadedly engaged on the other end of the tube and including a tapered surface for engagement with the other tapered surface of the hub shell, whereby, the hub shell is clamped between the cone and the cap.

Abstract: A pair of vernier calipers includes a shaft. A vernier is slidable along the shaft. A protractor has a base coupled to the vernier. A follower is pivotally coupled on the base. A spring is biased between the follower and the base so as to bias the follower to rotate in one direction relative to the base. A graduation is provided on the follower. A mark is provided on the base. When the vernier is pushed toward an object, the follower is caused to rotate so that a relative movement between the mark and the graduation indicates an angular dimension of the object.

Abstract: A hub includes an axle. Each end of the axle has an annular groove and a longitudinal groove. A dust cap, two bearings and a cone are provided on each end of the axle. A clamping ring has a key extending inwards for engaging with the longitudinal groove of the axle. The clamping ring is tapered from an outer peripheral edge toward a center so that the clamping ring is resilient. A lock ring is engaged with each annular groove. The clamping rings stably retain the axle in place so that the axle do not move laterally.