Abstract: A caliper brake assembly comprising a pair of pivotal caliper arms operatively connected to a remote brake lever via a double type control cable consisting of an inner cable and an outer cable, a brake shoe mounted to a lower end of each of the caliper arms, a return spring for urging each of the caliper arms to take its normal release position when the brake lever is in its rest position, the pair of caliper arms being arranged so as to bring the brake shoes into braking contact with the bicycle wheel when the brake lever is operated to pull the inner cable, wherein at least one of the pair of caliper arms has an auxiliary braking element adapted to automatically come into braking contact with the bicycle wheel when the inner cable is freed from tension.

Abstract: A bicycle speed change lever comprising: a stationary support spindle having an internally threaded axial hole and fixed at its one end to a bicycle frame tube, a lever handle rotatably mounted at its hole end portion on the support spindle, a plurality of washers supported on the spindle, a clipping holder which has a pair of axially spaced, holed disk-like portions resiliently connected to a cross arm and which is non-rotatably mounted on the spindle, with the washers and the holed end portion of the lever handle sandwiched between the pair of disk-like portions, to hold them together by pressure, and a lock bolt having its threaded shank engaged with the threaded axial hole of the spindle for applying adjusted frictional force to the holed end portion of the lever handle.

Abstract: A bicycle drive chain comprises a series of inner and outer link pairs connected in longitudinal alternation thereof, in which each of a first some of the outer link pairs includes a first left side and a first right side outer link plates, only the first right side outer link plate having a cutout or hollow formed in its inward-facing marginal edge, and each of a second some of the outer link pairs includes a second left side and a second right side outer link plates, only the second left side outer link plate having a cutout or hollow formed in its inward-facing marginal edge; and/or each of a first some of the inner link pairs includes a first left side and a first right side inner link plates, only the first right side inner link plate having a cutout or hollow formed in its inward-facing marginal edge, and each of a second some of the inner link pairs includes a second left side and a second right side inner link plates, only the second left side inner link plate having a cutout or hollow formed in its i

Abstract: One way clutch mechanism for a bicycle freewheel hub, which comprises a driver having one or more sprockets thereon and co-axial and relatively rotatable with respect to a stationary axle, a hub shell co-axial and relatively rotatable with respect to the axle, an inward conical clutch face formed on or with the hub shell, an internally threaded clutch member co-axially and relatively rotatably mounted on a threaded section of the driver so as to axially move back and forth; an outward conical clutch face formed on or with the clutch member, and a coil spring so arranged as to urge the clutch member axially inwardly thereby to force the outward clutch face away from the inward clutch face.

Abstract: A bicycle derailleur comprises a stationary member to be fixed to a bicycle frame, a first shaft integral with and extending from the stationary member, a spring-biased swing member pivotally supported at one end by the first shaft, a second shaft extending through the swing member at a position spaced apart from the first shaft in parallel relation with respect to the first shaft and in relatively rotatable relation with respect to the swing member, a movable member fixedly connected to and carried by the second shaft, and a restricting mechanism for restricting the second shaft from rotating about its own axis, so that a chain guide, which is operatively supported by the movable member, can move laterally with maintaining a certain constant positional relation with respect to a multi-speed driving gears of a bicycle.

Abstract: In a double assembly for bicycle speed control including a first lever for operating a rear derailleur by means of a control cable in order to shift an endless drive chain from one rear sprocket to a selected rear sprocket of a multiple freewheel, and a second lever for operating a front derailleur by means of a further control cable in order to shift the chain from one front sprocket to another front sprocket of a chainwheel, pivotal motion of the first lever causes synchronous sliding motion of the second lever through a motion converting mechanism so as to automatically center a guide cage of the front derailleur over a chain line thereby to prevent the chain from hitting the inside of the guide cage.

Abstract: In a ball head lock nut as a component element of bicycle head parts, a split clamping ring is received within an annular groove formed in a threaded, cylindrical internal wall of a substantially annular nut body; a deformable fixing piece, which has a diametrically extending slot formed in its inner end wall, is disposed within a radially extending threaded through hole formed in the annular nut body, with the slot engaged with a part of the split clamping ring; and a set screw is screwed into the radially extending threaded through hole to push the deformable fixing piece axially inwardly for forcible compression and deformation.

Abstract: A quick-release type hub for bicycles comprises a hub shell journalled on a stationary tubular axle through which extends a slidable spindle, at one end of which a cam lever is mounted co-axially rotatably with an actuating member which includes a clamping edge section and a releasing edge section; an elastically deformable spring washer interposed between the actuating member and a push member slidably mounted on the spindle, so that the push member is prevented from sliding axially outwardly as long as the clamping edge section is in contact with the spring washer; and the spindle being axially slidable only when the releasing edge section is in contact with the spring washer.

Abstract: A bicycle pedal comprises a pedal spindle rotatably supporting a pedal body, at least one spring member being engaged with the pedal body so as to absorb shocks caused by axial impact forces imparted to the pedal.

Abstract: A variable-speed bicycle comprises a multi-stage freewheel assembly with two or three sprockets mounted on a rear wheel hub, a rear derailleur is adapted to cooperate with the freewheel assembly for switching over a chain from one sprocket onto another, and an action converter is provided for converting a tension force of one direction into a thrust force of a transverse direction thereto. The derailleur comprising a horizontal support shaft mounted to a bracket, a tensioner mounted on the shaft, and a helical spring surrounding the shaft and interposed between the tensioner and the bracket. The tensioner is axially slidable on the shaft as well as rotatable about the shaft under the function of the spring, the action converter comprising a push arm disposed operatively in contact with the tensioner for imparting the thrust force thereto, all of the above constituent elements are housed within a gear case.

Abstract: The present invention is directed to a bicycle speed change lever comprising a support shaft secured to a mounting member, a lever body pivotally mounted on the support shaft, and a click plate disposed adjacent the lever body so as to be slightly movable in opposite directions about the support shaft for presenting the alternative of two positional phases. A plurality of spaced circular holes are formed in the click plate and aligned in an arc of a circle, a steel ball is retained between a base portion of the lever body and the click plate so as to be disengageable with any one of the plurality of circular holes, and a phase converting mechanism for converting the positional phases of the click plate from one phase to the other and vice versa. The phase converting mechanism including an engaging member formed with the click plate and a switching member secured to the mounting member which cooperate to effect the phase converting only when the lever body is pivotally moved in a reverse direction.

Abstract: A shift lever device for use with a bicycle comprises a bracket having a pair of spaced walls, a stepped slide shaft slidably mounted on the bracket and formed with a plurality of stepwise reduced cylindrical sections of different diameter, a push-button mounted to one end of the slide shaft, a coil spring interposed between the push-button and one of the pair of walls for urging the slide shaft in one direction, and a lever pivotally mounted on a support shaft supported by the bracket. A base portion of the lever is interposed between the pair of spaced walls and provided with a contact surface which is operatively contactable with a selected one of the plurality of stepwise reduced cylindrical sections of the stepped slide shaft.

Abstract: A bicycle speed change lever device comprises a lever body pivotally mounted on a support shaft and having a handle portion and a base portion which is formed with internal hollow spaces, within which are disposed a step positioning mechanism including a resiliently urged engaging piece and a plurality of engaging recesses arranged so as to cooperate for retaining the lever body in a selected speed gear position, and a one-way clutch mechanism including means for permitting the lever body to pivotally move in one direction with reduced frictional resistance.

Abstract: A bicycle rear derailleur which comprises a first shaft on which a guide pulley guard is pivotally mounted and resiliently urged in one direction, a second shaft supported by the guide pulley guard, an inner pulley rotatably mounted on the second shaft, a guide pulley rotatably mounted on the inner pulley, a tension link mounted at its upper end to the second shaft so as to be coaxially movable with the inner pulley and resiliently urged so as to be swingable in one direction, a tension pulley rotatably mounted on a third shaft which is supported by the tension link and a tension pulley guard.

Abstract: A bicycle free wheel hub with coaster brake adapted to be actuated by back-pedalling, comprising a clutch cone which has a clutch surface at its outward end and a brake-shoe expanding surface at its inward end, and is provided with an axial hole having an internal non-smooth surface, a plurality of slits which are formed in an inward portion of an anchor member fixedly mounted on a stationary axle, and a plurality of detent pieces which are respectively disposed within the slits for restricting a plurality of brake shoes from circumferential motion and are arranged so that they are elastically urged radially by a spring member for frictionally engaging each one end of the detent pieces with the non-smooth surface of the clutch cone.

Abstract: A safety device for use with a speed change gear system for a bicycle which comprises a casing mountable in position to a bicycle frame, a hollow shell member disposed within the casing, a resilient member including at least one first coil spring of large diameter and a second coil spring of a smaller diameter disposed within the shell member in axial alignment and partial overlapping relation with each other. Further, at least three axial spaced slide members are disposed within the shell member so as to be cooperative with the resilient member. A tubular sheath extends in curved position and is connected at one end to a rear derailleur and at the other end to one of the slide members, and a gearshift wire passes through the safety device and the tubular sheath.

Abstract: A multi-speed bicycle free wheel assembly comprises a free wheel body and a plurality of sprocket wheels different in diameter and fixedly mounted on the free wheel body, the free wheel body including an inner ring or driven member, an outer ring or drive member, a ratchet mechanism interposed between the two members for transmitting one way drive power to the outer ring, and a screw cup screwably secured to one side of the free wheel body, the screw cup having an annular flange formed integral with and extending circumferentially from a screw cup body, the annular flange extending parallel to and beyond the smallest sprocket wheel so as to prevent a bicycle drive chain from being accidentally disengaged outward from the smallest sprocket wheel disposed outmost relative to other larger sprocket wheels.

Abstract: A bicycle speed change lever device is combined with a fixing band having a pair of expandable open ends, wherein at least one inside nut holding means is formed with the open ends of the fixing band for supporting an inside nut. A cup member is mounted to the fixing band so as to receive the inside nut holding means in order to eliminate external projections with the fixing band. A lever handle is movably mounted on the cup member and a threaded shank passes through the cup member and the lever handle in engagement at its inner end with the inside nut.