Abstract: A front derailleur basically includes a fixed member, a movable member, a driven link and a first link. The fixing member is configured to be fixed to a bicycle frame. The movable member is movably supported with respect to the fixed member. The driven link is operatively coupled to the movable member. The first link movably connects the movable member to the fixed member, and is adjustably coupled to the driven link in a fixed position by a fixing structure to establish a fixed rest position of the movable member with respect to the fixed member.

Abstract: Bicycle single-acted gear-shifting device (12), comprising one front or rear derailleur (10, 20) coupling a ratchet indexing mechanism (13) acted by only one single-acting slave-connector (110, 120) attached to said ratchet indexing mechanism (13), operated by a unidirectional operator mechanism (15) with optional multiple unidirectional handle operator units (30). Said ratchet indexing mechanism (13) removably defines and holds a plurality of predetermined working stable positions of the derailleur's cage-plate (102,202) for each gearshift, and it comprises a ratchet-gear (1) with a pawls' system.

Abstract: A bicycle rear derailleur includes a base member mountable to a bicycle frame. A movable member is movably coupled to the base member. A chain guide assembly is rotatably connected to the movable member for rotation about a rotation axis. A biasing element is configured to bias the chain guide assembly for rotation in a first rotational direction with respect to the movable member. A damper assembly is operatively disposed between the chain guide assembly and the movable member to apply a damping force to the chain guide assembly when the chain guide assembly rotates in a second rotational direction opposite to the first rotational direction. The damper assembly includes a one-way roller clutch assembly disposed coaxially about the rotational axis and a friction unit extending circumferentially over a circumferential angle coaxially about the rotational axis.

Abstract: A front derailleur is basically provided with a base member, a chain guide, a link mechanism and a cable guiding structure. The base member is fixedly coupled to a bicycle. The chain guide is configured to guide a chain. The link mechanism movably couples the chain guide to the base member between a retracted position and an extended position in response to movement of an operation cable. The link mechanism includes a cable attachment portion that is configured to be attached to the operation cable. The cable guiding structure guides the operation cable from the cable attachment portion. The cable guiding structure is disposed on at least one of the base member and the link mechanism. The cable guiding structure has a cable exit that is arranged such that the operation cable exits forwardly from the cable guiding structure towards the front of the bicycle.

Abstract: A vehicular final drive chain path length compensation and adjustment system using an idler assembly which is moved in a prescribed geometry by a stiff system. The system and method maintains constant the chain path length during suspension travel. An idler arm assembly guides the idler assembly along an arc-shaped path, with displacement along this path determined not by a spring, but by a cam rotated by a trailing arm on the vehicle. The idler arm assembly allows for a simple static adjustment to compensate the chain path length for wear of components and tolerances in the vehicle assembly.

Abstract: A front derailleur for use on devices such as bicycles is movable about a yaw axis while it moves laterally. The front derailleur may include a linkage in between a mount and a cage, with the linkage pivoting about two non-parallel axes. The front derailleur may include a linkage in between the mount and the cage that has links of different effective lengths. The front derailleur may include a single link and a cam.

Abstract: A bicycle rear derailleur including a base member and a movable member movably coupled to the base member. A chain guide assembly is rotatably connected to the movable member and a damper assembly is operatively disposed between the chain guide assembly and the movable member. The damper assembly includes a damper disposed in the movable member, and a one-way clutch disposed between the damper and the chain guide assembly. The one-way clutch is configured to permit damping when the chain guide assembly rotates in a first direction. The damper is disposed exteriorly of the one-way clutch.

Abstract: A brake for an electric bicycle is described, said brake comprising at least one mounting block (21) including a brake lever bracket (13) and a brake lever (5). Suitably, the brake comprises an internal support-piece (17) in turn comprising at least one first hole (17A) for housing a brake cable (11) connected to a suitable braking apparatus and a seating portion (17B) for seating a sensor cable (19) connecting a braking sensor (19A) to an electric motor of said electric bicycle.

Abstract: A bicycle derailer includes abuse member, a movable member and a linkage assembly. The base member is mounted to a bicycle frame. The movable member moves between a retracted position and an extended position at which the movable member is farther from the base member than the retracted position. The linkage assembly operatively couples the base member and the movable member. The linkage assembly includes a first link, a second link, an extension link and a sliding link. The first and second links are pivotally coupled between the base member and the movable member. The extension link extends from one of the first and second links toward the other of the first and second links. The sliding link includes a sliding portion slidably coupled to the extension link to slide along the extension link and a pivoting portion pivotally coupled to the other of the first and second links.

Abstract: A bicycle rear derailleur includes a base member mountable to a bicycle frame. A movable member is movably coupled to the base member. A chain guide assembly is rotatably connected to the movable member for rotation about a rotational axis. A biasing device is configured to bias the chain guide assembly in a first rotational direction relative to the movable member. A damper assembly is disposed between the chain guide assembly and the movable member to apply a damping force to the chain guide assembly when the chain guide assembly rotates in a second rotational direction opposite to the first rotational direction. The damper assembly includes a one-way roller clutch assembly including radially inner and outer clutch members and roller elements acting between the inner and outer clutch members and a friction device including a friction biasing device and friction surfaces axially biased against and in frictional engagement with the one-way roller clutch assembly by the friction biasing device.

Abstract: A front derailleur is provided with a base member, a linkage assembly, a chain guide, an input link, a connecting link and an outer casing receiving part. The linkage assembly includes a first link coupled to the base member at a first pivot axis, a second link coupled to the base member at a second pivot axis, and an extension link coupled to the first link and the base member. The chain guide is coupled to the first and second links. The input link, is supported relative to the base member about a third pivot axis, and connects to an operation cable. The connecting link is connected to the input link about a fourth pivot axis and to the extension link about a fifth pivot axis. The outer casing receiving part is disposed on the base member and receives an outer casing through which the operation cable passes.

Abstract: A bicycle derailleur comprises a base member, a chain guide, a first link, and a wire guide. The base member is configured to be coupled to a bicycle frame. The chain guide is configured to guide a bicycle chain. The first link is configured to couple the chain guide to the base member so that the chain guide is movable relative to the base member between a retracted position and an extended position. The wire guide includes only one wire guiding portion configured to guide an inner wire of a control cable which is in at least one of a top pull arrangement and a bottom pull arrangement. The wire guide is a separate member from the first link and configured to be attached to the first link.

Abstract: The present invention relates to a device for stopping lateral displacement of a bicycle chain. The device comprises a mounting element configured to be mounted on a bicycle frame. The mounting element comprises a first portion configured to be coupled, at a first coupling axis, with a front derailleur of a bicycle, and a second portion configured to be coupled, at a second coupling axis distinct from said first coupling axis, with a stop element that stops the lateral displacement of said chain.

Abstract: A bicycle rear derailleur comprises a first member, a second member and a locking structure. The second member is pivotally attached to the first member about a pivot axis. The locking structure fixes a relative position of the first and second members with respect to a rotational direction about the pivot axis. The locking structure is configured to release the relative position of the first and second members from a fixed state upon a predetermined load being provided to one of the first and second members in the rotational direction with respect to the pivot axis.

Abstract: A brake safety apparatus that prevents an over the handlebar accident caused by applying too much brake force to the front brake of a bicycle is presented. The present invention works by effectively extending the length of the brake cable connected between the brake lever and the brake caliper on the front brake of a bicycle. An embodiment of brake release system comprises a brake cable housing coupled to a piston at a distal end of the lumen of a housing. The piston resides within the lumen of the housing. Between the piston and the proximal end of the housing is a compression spring with a desired spring rate and a preload breakout force. The proximal end of the housing is fixedly coupled to the front braking system of a bicycle.

Abstract: A transmission system for vehicles, including bicycles, is disclosed. The system aligns a chain or other drive means to a center of each of a plurality of provided sprockets, allows for a smaller, lighter and more durable shifter/controller, and reduces various complications associated with cable slack and shifting. A derailleur is provided with linear actuated features to directly translate drive means from one position to another along a desired path.

Abstract: A front derailleur is basically provided with a base member, a chain guide, a link mechanism and a cable guiding structure. The base member is fixedly coupled to a bicycle. The chain guide is configured to guide a chain. The link mechanism movably couples the chain guide to the base member between a retracted position and an extended position in response to movement of an operation cable. The link mechanism includes a cable attachment portion that is configured to be attached to the operation cable. The cable guiding structure guides the operation cable from the cable attachment portion. The cable guiding structure is disposed on at least one of the base member and the link mechanism. The cable guiding structure has a cable exit that is arranged such that the operation cable exits forwardly from the cable guiding structure towards the front of the bicycle.

Abstract: A bicycle sprocket support assembly is provided with a sprocket support body, a first sprocket support member and at least first and second sprockets. The sprocket support body has a tubular shaped part with an exterior surface and an interior surface arranged around a center longitudinal axis. The first sprocket support member is integrated with the exterior surface of the sprocket support body as a one-piece, unitary member and projects radially from the exterior surface of the sprocket support body. The first and second sprockets are fixed to the first sprocket support member by at least one fastener with the first and second sprockets being supported at axially spaced apart locations along the center longitudinal axis of the sprocket support body.

Abstract: The present invention is a derailleur for moving a chain to a different sized sprocket in a drive sprocket nest comprising: a feed arm for directing onto one of multiple sprockets within the drive sprocket nest when the feed arm is rotatably mounted at a pivot end onto a frame of a vehicle; a take up roller attached to the feed arm supporting the chain so that when the take-up roller moves laterally the chain moves from one sprocket to another sprocket in the drive sprocket nets; a roller feel sprocket supporting the chain so that the chain contacts over ½ the perimeter of the sprocket contacting the chain in the drive sprocket nest; an opposite chain guide end attached to the feed arm so that the chain guide end traces a path substantially parallel to a tangent to the outer periphery of the drive sprocket nests.

Abstract: The present invention provides an electronic front derailleur including a driving member, a driving pulley, a driven pulley, a transmission shaft, a transmission assembly, and a chain guide member disposed with a chain-moving member connected to the transmission assembly, wherein the chain-moving member is disposed with a groove to receive a chain. When the driving member drives the driving pulley to rotate the driven pulley, then the driven pulley further actuates the transmission shaft to move therewith, and then the transmission assembly and the chin guide member are further driven to make movements, allowing the bicycle chain move from one sprocket to another sprocket with a different size.

Abstract: A front derailleur comprises a base member structured to be attached to a bicycle frame member, a chain guide operatively connected to the base member, and an actuation mechanism coupled to the base member and to the chain guide for moving the chain guide relative to the base member between a first position corresponding to a location for positioning a chain on a first sprocket and a second position corresponding to a location for positioning the chain on a second sprocket. The actuation mechanism is configured so that an actuation ratio of the derailleur when the chain guide is located in the first position is greater than or equal to 1.5 times the actuation ratio when the chain guide is located in the second position.

Abstract: A device for mounting a derailleur of a rear gearshift on a bicycle frame is provided. The device includes a pin suitable for being fixed in a corresponding seat of said bicycle frame, an annular seat formed on said pin, a support body of said derailleur, a through hole formed in said support body and crossed by said pin, an abutment element associated with said pin in said annular seat, wherein said abutment element provides a support in the axial direction on said pin. Said abutment element comprises a first and a second component, which are shaped like an annular sector and that can be connected together through respective shaped attachment portions.

Abstract: A derailleur device, particularly a rear derailleur, includes at least one locking device for locking a chain guide at least in one locking position that is different from the starting position in relation to a movable element, and it is provided therein that the locking device includes a locking element displaceable between a passive position, in which the chain guide is released in relation to the movable element, and at least one active position, in which the chain guide is held in the at least one locking position.

Abstract: A method for electronically controlling a bicycle gearshift comprising at least one derailleur is disclosed, comprising the sequential steps of: a) imparting a movement on the derailleur of the gearshift until the derailleur is in an intended position; b) waiting for a predetermined time period, c) performing a check whether the derailleur is in the intended position, within a possible predetermined tolerance, d) in case said check has a negative outcome, imparting a movement on the derailleur of the gearshift until the derailleur is in the intended position. A derailleur and an electronically servo-assisted bicycle gearshift comprising control electronics comprising modules adapted to carry out the method outlined above are also disclosed.

Abstract: A transmission system for vehicles, including bicycles, is disclosed. The system aligns a chain or other drive means to a center of each of a plurality of provided sprockets, allows for a smaller, lighter and more durable shifter/controller, and reduces various complications associated with cable slack and shifting. A derailleur is provided with linear actuated features to directly translate drive means from one position to another along a desired path.

Abstract: A rear derailleur includes a base member, a movable member, a linkage and an electric motor unit. The base member includes a bicycle mounting portion for attaching to a bicycle. The movable member includes a chain guide having a first pulley that rotates around a first pulley axis in a center pulley plane that bisects the first pulley. The linkage movably supports the movable member relative to the base member. The electric motor unit is stationary with respect to at least a part of the base member and operatively coupled to the linkage to move the movable member relative to the base member between an outermost lateral position and an innermost lateral position. The electric motor unit is at least partially disposed inward of the center pulley plane while the movable member is disposed in the outermost lateral position.

Abstract: A bicycle derailleur adjusting apparatus for adjusting a bicycle derailleur includes a controller. The bicycle derailleur includes a base member adapted to be mounted to a bicycle, a movable member, a linkage coupled between the base member and the movable member, and an actuator configured to move the movable member of the bicycle derailleur among a plurality of derailleur positions. The controller is configured to control the actuator based on a travel value indicative of a travel distance of the movable member between adjacent derailleur positions to update the derailleur positions of the movable member.

Abstract: The present invention relates to a device for stopping lateral displacement of a bicycle chain. The device comprises a mounting element configured to be mounted on a bicycle frame. The mounting element comprises a first portion configured to be coupled, at a first coupling axis, with a front derailleur of a bicycle, and a second portion configured to be coupled, at a second coupling axis distinct from said first coupling axis, with a stop element that stops the lateral displacement of said chain.

Abstract: A bicycle transmission control apparatus comprises a control unit that provides a first signal to operate a first derailleur a gear shift distance from a first origin sprocket to a first destination sprocket. The control unit receives a condition signal that indicates a condition resulting from at least one of the first derailleur and a second derailleur; and an adjustment controller moves the first derailleur an adjustment distance less than the gear shift distance in response to the condition signal.

Abstract: A derailleur comprises a base member, a movable member, a link member, and a biasing mechanism. The movable member is configured to be movable with respect to the base member between a retracted position and an extended position. The link member is configured to movably couple the movable member to the base member. The biasing mechanism is configured to bias the link member such that the movable member is disposed at one of the retracted position and the extended position. The biasing mechanism comprises a biasing member and an intermediate member. The biasing member has a first end portion. The intermediate member is separately provided from the movable member and the link member so as to transmit biasing force of the biasing member from the first end portion to one of the movable member and the link member through the intermediate member.

Abstract: A derailleur comprises a base member, a chain guide, a link member, and a shaft member. The base member is configured to be attached to a bicycle frame. The chain guide comprises a first member and a second member. The first member includes a first connecting portion. The second member includes a second connecting portion to overlap the first connecting portion. The link member is configured to movably couple the chain guide to the base member. The shaft member is configured to couple the first connecting portion to the second connecting portion and configured to rotatably couple the chain guide to the link member.

Abstract: A bicycle electric actuator unit basically has a housing, an electric drive part and a cable holding member. The electric drive part is disposed in the housing and electrically connected to an electrical cable. The cable holding member is provided at an outer surface of the housing to hold a portion of the electrical cable. The bicycle electric actuator unit can be for example part of an electric bicycle component such as an electric front derailleur or an electric rear derailleur.

Abstract: A bicycle derailleur includes a base member, a movable member, a motor unit, a linkage and a saver mechanism. The linkage includes a first link that includes a first linking member and a second linking member. The first linking member is pivotally connected to the movable member. The second linking member is pivotally connected to the base member, and is attached to the first linking member. The saver mechanism includes an output member movably operated by the motor unit, a drive link movably mounted on the first link between a drive transmitting position that connects a drive force of the motor to the first link and a non-drive transmitting position that disconnect the drive force of the motor from the first link, and a biasing element biasing the drive link into engagement with the output member to maintain the drive link in the drive transmitting position.

Abstract: A roller-chain tensioning assembly includes a resilient bow-shaped structure to which are mounted first, second and third guide wheels. These guide wheels are mounted in such manner that a roller chain can be threaded around said first guide wheel on side facing away from said bow, around said second guide wheel on side facing said bow, and around said third guide wheel on side facing away from said bow.

Abstract: A bicycle derailleur is basically provided with a main body, a chain cage, a first pulley, a second pulley and a chain contact member. The main body is configured to be mounted to a bicycle. The chain cage is pivotally coupled to the main body movement between at least a first orientation and a second orientation. The first pulley is rotatably coupled to one of the chain cage and the main body. The second pulley is rotatably mounted to the chain cage to move therewith relative to the main body. The chain contact member is coupled to the main body. The chain contact member includes a non-rotatable chain contact portion that projects into a chain path between the first and second pulleys while the chain cage is in the first orientation, and that is located outside of the chain path between the first and second pulleys while the chain cage is in the second orientation.

Abstract: A front derailleur is attachable to a bicycle with a frame in which a fixing bore is provided. The front derailleur basically includes a base member, a chain guide and a link mechanism. The base member has an attaching bore for attaching the base member to a fixing bore of a frame by a fastening member. The chain guide configured to guide a chain. The link mechanism movably couples the chain guide to the base member. The base member is disposed with respect to the chain guide such that at least a part of the attaching bore is disposed in front of the chain guide and above the chain guide while the front derailleur is in a state in which the base member is attached to the frame.

Abstract: A front derailleur is provided for mounting to a bicycle having a crank axis. The front derailleur is provided with a base member, a chain guide and a link mechanism. The base member is mounted on the bicycle for positioning in a predetermined adjustment direction. The chain guide guides the chain. The link mechanism movably couples the chain guide to the base member. The link mechanism includes a first link member pivotally arranged in relation to the base member about a first link axis and pivotally arranged in relation to the chain guide about a second link axis. The first link axis and the second link axis are arranged non-parallel and non-orthogonal to the predetermined adjustment direction when viewed from the axial direction of the crank axis in a state where the base member is mounted to the bicycle.

Abstract: A front derailleur that includes a fixing member that is configured to be fixed to a bicycle frame, a chain guide movable between a retracted position and an extended position with respect to the fixing member, a linkage mechanism coupling the chain guide to the fixing member, and a biasing member that biases the chain guide toward one of the retracted position and the extended position. The linkage mechanism includes a first link member that is pivotable with respect to the fixing member about a first axis and is pivotable with respect to the chain guide about a second axis that is positioned above the first axis when the fixing member is fixed to the bicycle frame. The biasing member is coaxially arranged around the second axis.

Abstract: A bicycle derailleur basically includes a base member, a movable member, a chain guide, a friction element and a motor. The base member is configured to be mounted to a bicycle. The movable member is movably coupled to the base member. The chain guide is coupled to the movable member to rotate around a rotational axis with respect to the movable member. The friction element is operatively arranged between the movable member and the chain guide to frictionally provide rotational resistance in a first rotational direction of the chain guide. The motor is operatively coupled to the movable member to move the movable member with respect to the base member.

Abstract: A front derailleur is basically provided with abuse member, a chain guide, a link mechanism and a cable guiding structure. The base member is fixedly coupled to a bicycle. The chain guide is configured to guide a chain. The link mechanism movably couples the chain guide to the base member between a retracted position and an extended position in response to movement of an operation cable. The link mechanism includes a cable attachment portion that is configured to be attached to the operation cable. The cable guiding structure guides the operation cable from the cable attachment portion. The cable guiding structure is disposed on at least one of the base member and the link mechanism. The cable guiding structure has a cable exit that is arranged such that the operation cable exits forwardly from the cable guiding structure towards the front of the bicycle.

Abstract: A front derailleur unit basically includes a fixed member and a movable member. The fixed member is configured to be releasably attached to a plurality of different type mounting units. The different type mounting units is detachably attached to a bicycle frame. The movable member is movably supported to the fixed member to move with respect to the fixed member.

Abstract: A rear derailleur is basically provided with a base member, a movable member, a chain guide, a friction element, a one-way clutch and an electric actuator. The base member is configured to be mounted to a bicycle. The movable member is movably coupled to the base member. The chain guide is coupled to the movable member to rotate around a rotational axis with respect to the movable member. The friction element is operatively arranged between the movable member and the chain guide to frictionally provide rotational resistance in a first rotational direction of the chain guide. The one-way clutch is operatively disposed between movable member and the chain guide to engage the friction element as the chain guide rotates in the first rotational direction. The electric actuator is operatively coupled to the one-way clutch to control the one-way clutch between a clutch-on mode and a clutch-off mode.

Abstract: A bicycle derailleur includes a fixing member, a selected chain guide unit and a motor unit. The fixing member is configured to be fixed to a bicycle frame. The selected chain guide unit has a chain guide for guiding a bicycle chain and a support mechanism moveably supporting the chain guide relative to the fixing member. The selected chain guide unit is one of a plurality of different configurations of chain guide units. The motor unit is configured to be selectively attached to the selected chain guide unit to move the chain guide. The motor unit is configured to be mounted to each of the plurality of configurations of chain guide units.

Abstract: A method for electronically controlling a bicycle gearshift and a bicycle electronic system, wherein when a gearshifting request is transmitted from an electronic control unit to a driving unit, the driving unit associates a wait for a waiting time therewith. In the case of a multiple gearshifting, the waiting time allows a chain to mesh securely with a toothed wheel. By providing for the wait to be carried out in a driving unit of a derailleur, the computing capability of an electronic control unit is not affected by the management of the wait, and the electronic control unit is free to carry out other functions, for example the management of errors of the electronic system, communication with a display unit or various sensors of the electronic system, etc.

Abstract: A bicycle derailleur comprises a base member, a movable member movably coupled to the base member, and a chain guide coupled to the movable member for rotation around a rotational axis. A resistance applying element applies resistance to rotational movement of the chain guide. A resistance control element moves between at least different first and second positions, wherein the resistance control element is disposed so that the resistance control element can be directly manipulated by a user without using a tool. The resistance control element is operatively coupled to the resistance applying element so that the resistance applying element applies different first and second resistances to rotational movement of the chain guide when the resistance control element is disposed in the respective first and second positions.

Abstract: A bicycle derailleur comprises a base member, a movable member movably coupled to the base member, and a chain guide coupled to the movable member for rotation around a rotational axis. A resistance-applying element applies resistance to rotational movement of the chain guide, and a resistance control element moves between at least different first and second positions. The resistance control element is operatively coupled to the resistance-applying element so that the resistance-applying element applies different first and second resistances to rotational movement of the chain guide when the resistance control element is disposed in the respective first and second positions. A jolt element is disposed within the movable member and is operatively associated with the resistance control element to provide a tactile jolt to a user as the user moves the resistance control element from the first position to the second position.

Abstract: The present invention relates to a device for mounting a front derailleur on a bicycle frame. The device of the invention comprises engagement means for engaging with at least one toothed crown of a crankset and with the derailleur, the engagement means being configured to obtain a desired relative position between the aforementioned at least one toothed crown and the derailleur. The present invention also relates to a method for mounting the front derailleur on the bicycle frame, such a method providing for the use of the aforementioned device.

Abstract: A front derailleur basically includes a fixed member, a main body, a movable member and a support member. The fixing member is configured to be fixed to a bicycle frame. The main body is attached to the fixing member. The movable member is movably supported to the main body with respect to the fixing member. The support member is movably attached to one of the fixing member and the main body. The support member including an operated portion selectively operated by an operating element and positioned between the fixing member and the main body.

Abstract: A bicycle derailleur comprises a base member, a movable member movably coupled to the base member, and a chain guide coupled to the movable member for rotation around a rotational axis. A resistance applying element applies resistance to rotational movement of the chain guide, and a resistance control element moves between at least different first and second positions. The resistance control element is operatively coupled to the resistance applying element so that the resistance applying element applies different first and second resistances to rotational movement of the chain guide when the resistance control element is disposed in the respective first and second positions.

Abstract: A rear derailleur includes a base member, a movable member, a linkage and an electric motor unit. The base member includes a bicycle mounting portion for attaching to a bicycle. The movable member includes a chain guide having a first pulley that rotates around a first pulley axis in a center pulley plane that bisects the first pulley. The linkage movably supports the movable member relative to the base member. The electric motor unit is stationary with respect to at least a part of the base member and operatively coupled to the linkage to move the movable member relative to the base member between an outermost lateral position and an innermost lateral position. The electric motor unit is at least partially disposed inward of the center pulley plane while the movable member is disposed in the outermost lateral position.