Abstract: The invention relates to an assembly for adjusting the force of a return spring incorporated in a brake arm for bicycles. A brake arm (4) and a return spring (10) are fitted around a pivot (3C) on a mount (3) fixed to the fork (2) of a bicycle. One end (10A) of the return spring (10) is held to one of the mount (3) and the brake arm (4). The other has in screw-thread engagement therewith an adjusting screw (19) provided at its head with a socket portion (20) having the other end (10B) of the return spring (10) fitted therein. The spring force is adjustable, with the other end (10A) of the return spring (10) prevented from lateral displacement.

Abstract: A bicycle brake comprising a pair of brake arms movable toward or away from each other and each having a brake shoe, an arm mount having a pivot attachable to the body of a bicycle and supporting each of the brake arms thereon, return springs for always biasing the respective brake arms away from each other to move the brake shoes away from each other, and a spring cap fixedly connected to the pivot. Each return spring has one end projecting out from the spring cap or the brake arm directly or indirectly. The spring end is movable from outside to adjust the biasing force of the spring.

Abstract: A brake manipulating member or operating member has a pair of opposed walls each formed with a hole. A capped bush made of abrasion-resistant synthetic resin and having a flange around a closed end thereof and a retaining flange around an open end thereof is fitted in the hole with the open end positioned inward. A rollershaped connector has a trunk portion slightly smaller than the hole in diameter, a short pin portion projecting from each end of the trunk portion, a wire engaging portion at the center of the trunk portion and an overall length equal to or slightly smaller than the outside width of the portion of the manipulating or operating member having the two walls. The opposite pin portions of the connector are inserted in and supported by the bushes mounted on the pair of walls.

Abstract: The invention relates to a brake lever device for use on the handlebar of a bicycle. With conventional brake lever devices, the center of rotation of the brake lever is a large distance away from the axis of the handlebar, radially outwardly of the bar, and the Bowden cable connected to the lever is correspondingly projected and is very likely to be caught by an obstacle, while the arrangement involves waste of materials. Accordingly, to position the center (O) of rotation of a brake lever (43) close to the central axis of the handlebar (1), a pivot (4) for the brake lever (43) is positioned perpendicular to the central axis (C) of a handlebar inserting bore (5) of a brakcet (2).

Abstract: A wire coupling device for connecting a displacement-transmitting wire therein is formed by engagement of two wire engaging members, wherein a first engaging member is entered through pivotal holes and then a second engaging member is inserted into a hollow cylinder of the first member, thereafter the two members are circumferentially turned to coincide respective notched grooves, thus the wire coupling device is formed. To the formed device, a wire terminal nipple is connected to serve as a wire coupling in a brake system of a bicycle, wherein the first member and the second member are integrally engaged and are adapted to turn in pivotal holes. Further the invention prevents possible disengagement of the connected nipple by way of turning the two engaged members relatively for about 180 degrees to cross over the grooves and openings provided on the members so that the nipple is enclosed in the wire coupling device.

Abstract: A brake lever device that permits selective and interchangeable introduction of a Bowden cable to a brake lever via either of the top and base of a hollow housing of the device. To this end, the brake lever of the device is provided with first and second connectors to which an inner wire of the Bowden cable is connected to the brake lever, a first opening is provided at the base of the hollow housing and a second opening provided at the top of the hollow housing, a first retainer, which retains an outer sheath of the Bowden cable while permitting passage of the inner wire, is situated between the first opening of the housing and the first conductor of the brake lever, while a second such retainer is situated between the second opening of the housing and the second connector of the brake lever. Additionally, a covering is provided for covering the second opening when the Bowden cable is introduced via the first opening, but which may be removed for enabling use of the second opening.

Abstract: A bush made of plastic for use in a bicycle brake device of the type having a cylindrical portion integrally connected with a flange, which is provided at one end of the cylinderical portion, has the flange provided, successively, from the cylindrical portion toward an outer edge of the flange with a flat part, a bulged part following the flat part, and an inclined and flat part, which follows the bulged part and is inclined outwardly from in a direction opposite to the bulged portion relative to the end of the cylindrical portion. The flange construction maintains a gap between two members in a cushioning manner and enables a reduced frictional resistance.

Abstract: An operating unit including a brake operating lever capable of being grasped is mounted to a handlebar or the like. The brake unit for applying a braking force to the members to be controlled such as the wheels or the like is connected by a Bowden cable. In addition to the brake returning spring provided on the side of the afore-mentioned brake unit, a side of the brake operating lever is equipped with a returning spring. One end of the returning spring is mounted to the housing, while another end thereof is held on the side of the brake operating lever thereby exerting a force in the direction in which the lever is to be returned after being grasped and released.

Abstract: A caliper brake apparatus of the side-pull type having a center adjusting device comprising a fixed member fixedly mounted on a center rod and a turnable member rotatably mounted on the center rod. The turnable member holds a brake spring for the brake apparatus and has a pair of projections extending diametrically outwardly of the rod. The fixed member is provided with an axially movable screw member having a forward end in contact with one of the projections and has a spring member in bearing contact with the other projection for biasing the turnable member to hold the above-mentioned one projection in contact with the forward end of the screw member at all times.

Abstract: A brake shoe mount for a brake apparatus comprising a first rotatable member mounted on a brake arm and rotatable about a first axis and a second rotatable member fixedly provided with a brake shoe, mounted on the first rotatable member and rotatable about a second axis positioned away from the first axis and wherein the first rotatable member is non-rotatably fixed to the brake arm, and the second rotatable member is non-rotatably fixed to the first rotatable member.

Abstract: A housing pivotably supporting an operating lever is mounted on a handle bar by a band. A nut with opposite end ears engaged in apertures formed in the ends of the band is held drawn into the housing by a bolt provided within the housing and extending through the nut in screw-thread engagement therewith to fasten the band to the handle bar. Each of the ears includes a shank projecting from each end of the nut and a flange formed at the outer end of the shank and having a portion remote from the center of the shank and a portion close to the shank center diametrically of the shank. Each of the apertures in the band is so shaped as to permit the flange to removably pass therethrough and to render the shank displaceable within the aperture, thereby making the band engageable with the inside surface of the flange.

Abstract: In a brake apparatus for a bicycle including a pair of brake arms each having a brake shoe and turnably mounted on a center bolt, and a brake spring for biasing the shoes away from each other, a center adjusting device comprising a retainer supported on the center bolt turnably relative to the bolt for retaining the brake spring, a holder mounted on the bolt immovably about the axis of the bolt and an adjusting member supported by the holder and associated with the spring retainer. The adjusting member is positioned on one side of the center bolt as displaced laterally outward from the frame of the bicycle and thereby rendered easily operable to effect accurate adjustment.

Abstract: In a brake for bicycles including brake shoes having brake blocks and secured by a threaded fastening member to brake arches so that the brake blocks are engageable with and disengageable from the rim of a wheel, a device for adjustably or shiftably supporting the brake shoe on the brake arch. A convex portion and a concave seat for receiving the convex portion are provided between the brake shoe and the brake arch, such that when the fastening member securing the brake shoe to the brake arch is loosened, the brake shoe is shiftable to position the brake block properly with respect to the wheel rim by virtue of cooperation of the convex portion and the concave seat. After the brake shoe has been adjusted to place, the fastening member is tightened up, whereby the brake shoe is fastened to the brake arch, with the concave portion and the seat fitted together face-to-face.

Abstract: There is disclosed a guy wire suspension device for center-pull type caliper brakes for bicycles, comprising a suspension unit provided with a groove for receiving at least two guy wires interconnecting a pair of arches, and a brake operating Bowden cable inner wire fixing unit to be integrally assembled to the suspension unit transversely of the latter, the arrangement being such that the at least two guy wires received in said groove are equally divided by the inner wire of the Bowden cable vertically inserted into the suspension unit so that at least one guy wire exists on either side of the inner wire, and that the lower end of the inner wire extending through the suspension unit is fixed by the fixing unit at a position below the level where the guy wires are received, thereby assuring the application of an equal upward force to each guy wire for secure and stabilized brake operation.