Abstract: An operating lever device of the present invention includes housing 3, an operating lever 5 pivotably mounted on the housing 3 by a first support shaft 4, a first link 7 pivotably mounted on the operating lever 5 by a second support shaft 6, an operating cable 8 connected to an end portion of the first link 7 and extending outwardly through the housing 3, and means 9 for restraining the pivotal movement of the first link 7 in a manner that when the operating lever 5 is operated the end portion of the first link 7 may approach the first support shaft 4.

Abstract: A brake operating device for bicycles, comprises a brake lever rotatably installed through a pivot on a housing mounted on a handlebar, an operating wire interlockingly connected to the brake lever through a wire connector, and a force transmission ratio adjusting means for adjusting a transmission ratio by moving the wire connector toward and away from the pivot in accordance with the operation of the brake lever. In this device, the force transmission ratio adjusting means comprises a long hole provided in the brake lever and guiding the wire connector in relation to the pivot, and a link pivotally installed at one end to the wire connector installed in the long hole and also pivotally supported at the other end on the housing through the other pivot than the pivot stated above.

Abstract: A cantilever brake for a bicycle includes a pair of bolts each having a threaded portion engaged removably in the threaded bore of one of a pair of cantilever mounting bases fixed to a bicycle frame, a shank which is larger in diameter than its threaded portion, and a head which is larger in diameter than its shank. A pair of spring adjusting members are provided each fitted rotatably about the threaded portion of one of the bolts, and held by and between those end surfaces of the shank of the one bolt and of one of the cantilever mounting bases which face each other. A pair of cantilevers are provided each fitted rotatably about the shank of one of the bolts, and including a boss having a recess which is open towards one of the spring adjusting members. A pair of return springs are provided each housed in the recess of the boss of one of the cantilevers, and having one end engaging the boss of the one cantilever and another end engaging one of the spring adjusting members.

Abstract: In a handle bar comprising a horizontal straight portion fixed at its center a stem, a pair of U-shaped portions bent from the straight portion forming first grip-holders, a pair of elongated portions extended upward slantingly from the U-shaped portions toward the front center, the elongated portions being connected with a connecting member forming second grip-holders, the bar in its entirety being a substantial isosceles triangle seen from the above, brake levers and speed change levers are collectively provided on the connecting member. Both levers can be operated simply with wrist actions while arms are placed on elbow rests provided at the straight portion of the handle bar.

Abstract: A brake shoe includes a mounting portion at its rear side. The mounting portion is angularly adjustable relative to a brake arm. An angular position adjusting member is removably fit in at least the rear end of a shoe body in the direction of rotation of a wheel. The angular position adjusting member and one end of a braking surface are pressed against a wheel rim. After the mounting portion is fixed to the brake arm, the angular position adjusting member is removed. This enables adjustment of a clearance between the wheel rim and the brake shoe.

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 brake device having a pair of cantilevers each of which is connected to an arch wire by a wire connector and which carries a brake shoe assembly. The middle portion of each cantilever is curved away from the fork upon which it is mounted so that the wire connector of the cantilever and the stem of the brake shoe assembly are located on an extension line of the arch wire when viewed from a lateral side of the brake device, thereby reducing the moment developed between these parts. The mount shaft for the brake shoe stem of each brake shoe assembly is inserted into the cantilever from a side of the cantilever that faces the fork and is fastened by a fixing nut at an opposite side of the cantilever, thereby improving serviceability.

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 pair of inwardly projecting right and left mounting brackets are mounted on a fork carrying a wheel and a cantilever is pivotally carried on the inner end of each mounting bracket by a pivot shaft, with a brake shoe mounted on each cantilever. The mounting bracket is freely displaceable between an inwardly projected position and an outward withdrawn position.This device thus prevents outward projection of the cantilevers while ensuring a reliable braking with a smaller operating force. It also facilitates fitting and removal of the wheel.

Abstract: It consists of a pair of brake arms provided with brake shoes, the distance between which can be freely widened or narrowed, arm mounting plates provided with support shafts to support brake arms and attached to a bicycle body, return springs which energize brake arms constantly in spreading directions so as that aforementioned brake shoes are separated apart from each other, and spring caps and tightening bolts.A return spring storage recess is formed around the support shaft and in the bossed section of the aforementioned brake arm, within said recess is stored the return spring fitted onto the support shaft; while one end of the return spring is engaged onto the bossed section of each arm, the other end is engaged onto the spring cap which is directly or indirectly connected to the support shaft; and a rotating tool seat is provided at the periphery of the spring cap at least on one arm for the purpose of spring tension adjustment.

Abstract: In connecting an operating lever to the inner wire of a Bowden cable, a nipple is secured to one end of said inner wire, and on the other hand, a connector, in which a locking hole for engaging said nipple is formed, is supported within said operating lever so that the nipple of said inner wire engages the locking hole of said connector. Also, a ring body which presses the top surface of the nipple is attached to the circumferential surface of said connector to restrain said nipple within the locking hole of said connector. Said ring body prevents the nipple from unexpectedly projecting or falling from the connector as a result of elongation, etc. of the inner wire. The ring body has a handle-shaped pickup portion with a slot-shaped tool opening and is carried solely by the connector hidden within the operating lever.

Abstract: Suspension wires of a bicycle brake are connected to the upper ends of a pair of brake arms (i.e., right and left brake arms) which are loosely pivotally mounted to a bicycle bodyo and are equipped with brake shoes, and the suspension wires are connected to a lower end of a Bowden cable for operating the brake via a hanger. The upper end of each suspension wire is connected to the hanger by means of a release lever. The lower end of this lever is pivotallyl mounted to the lower end of the hanger by means of a pin. Also, the upper end of the suspension wire is connected to an intermediate portion of the lever, and the pin is located outside the upper end of the suspension wire while the upper end of the lever lies against a respective side of a fastener when the brake is set.

Abstract: A pair of arms provided with brake shoes is mounted onto a cycle body via a mounting plate, so as to be freely rotatable, and an adjustment metal is installed between a shaft on the mounting plate and a bossed section of one arm, one edge of said adjustment metal being engaged onto the bossed section and the other edge being indirectly connected to the aforementioned shaft. The return spring tension can be strengthened or weakened by rotation of this adjustment metal from outside. The clamping protrusions on the adjustment metal are made to engage onto the ratchets on the stop ring by strong pressure from a spring element.

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: Each of a pair of brakes arms has a boss portion formed with a cavity around a pivot on an arm bracket for supporting the brake arms on the body of a bicycle. A pair of return springs for biasing the brake arms toward or away from each other for braking each have a coil portion provided around the pivot and accommodated in the cavity. The return spring has one end fixedly engaged in the boss portion and the other end fixedly engaged in a spring adjusting member which is supported by the pivot and rotatable only in the coil portion winding direction. Thus, each return spring is protected from corrosion, made smoothly operable for the desired braking action and readily adjustable by turning the adjusting member.

Abstract: A side-pull caliper brake device comprising an arch support pivot, a first arch and a second arch rotatably supported by the pivot, first and second return springs each in the form of a coil and fitted around the pivot for biasing the first and second arches away from each other, and a Bowden cable for moving the arches toward or away from each other. The first spring has one end engaged with the pivot and the other end engaged with the first arch. The second spring has one end engaged with the second arch and the other end engaged with an adjusting ring rotatably mounted on the pivot. The adjusting ring is prevented from rotating relative to the pivot by a fastening nut. The force of the return springs is adjustable by rotating the adjusting ring. The springs are engaged in place without sliding and therefore smoothly bias the first and second arches. The springs, which are provided around the pivot and enclosed in the cavities, are free of deposition of mud or the like and protected from corrosion.

Abstract: A device for holding a brake outer wire comprising a hollow screw tube for holding one end of the outer wire as inserted therein, a wire adjusting nut having the screw tube screwed therein, a holder main body mounted on an arm extending from a small brake arch and rotatably supporting the adjusting nut thereon, a rotatable knob portion provided at one end of the adjusting nut and having a recess in one side thereof opposed to the holder main body, a ring fitted in the recess nonrotatably relative to the knob portion and a wavy washer provided in the recess for biasing the ring toward the holder main body. One of the holder main body and the ring has a rugged surface opposed to the other, and the other of the main body and the ring has projections engageable with the rugged surface with a click when the adjusting nut is rotated.