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: 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: 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.

Abstract: A brake operating device comprising a housing having a bearing portion, an operating lever supported by a pivot on the bearing portion, and a coiled return spring having a pair of engaging portions extending from the axial opposite ends of its coil portion laterally outward for biasing the lever in a returning direction. The coil portion of the spring is accommodated inside the operating lever and has its axis positioned in parallel with the axis of the pivot. One of the engaging portions is attached to the bearing portion, and the other engaging portion extends along the lever and has a slider slidably in contact with the lever inner surface. The spring is therefore retained in position, properly biasing the lever in the returning direction.

Abstract: Device comprising an adjusting device provided at least at one end of a bowden cable for transmitting a grasping force on a brake operating lever in a direction to actuate brake shoes. The adjusting device includes a gauge member having a bore for passing the inner element of the cable therethrough and a hole or recess formed at one end of the bored portion and having a depth to determine a proper brake clearance, a nut having a portion shaped to fit in the recess of the gauge member and a portion of a shape unfittable in the recess when turned through a desired angle, and an adjusting screw member screwed in the nut and connected to the outer element of the cable.

Abstract: The present invention relates to a device for use with a bicycle brake system consisting of brake means including a housing secured to a handle bar, and a brake operating lever grippably secured to said housing; brake means for braking a wheel; and a Bowden cable for transmitting a gripping force on the brake operating lever in a direction in which the brake means acts to apply the brakes, said Bowden cable consisting of an inner cable and an outer sheath which operatively interconnect the brake means and the brake operating means, said device being arranged so that when gripping the brake operating lever to a predetermined extent fails to fully exert the intended braking action due, for example, to wear of the brake shoes and/or elongation of the Bowden cable, such decrease in or lack of the braking action is automatically compensated by utilizing the gripping action on the brake operating lever. The automatic adjusting device described above is substantially installed in the brake operating means.