# US 11,440,621 B2 · Bicycle electrical front derailleur > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,440,621 B2 - Document ID: US11440621B2 - Status: Granted - Kind: B2 - Application number: 16/438,221 - Filed: 2019-06-11 - Published: 2019-09-26 - Granted: 2022-09-13 - Earliest claimed: 2015-10-30 - Assignees: Shimano Inc. - Applicants: Shimano Inc. - Inventors: Atsushi Komatsu; Shingo Sakurai; Yuta Kurokawa - Web page: https://patentgrep.com/patent/US11440621B2 ## CPC - B62M 9/122: electrically or fluid actuated; Controls thereof - B62J 45/20: Cycle computers as cycle accessories - B62K 19/36: for attaching saddle pillars, e.g. adjustable during ride - B62K 25/286: {the shock absorber being connected to the chain-stay via a linkage mechanism} - B62K 25/30: pivoted on pedal crank shelf (B62K25/32 takes precedence) - B62M 9/132: electrically or fluid actuated; Controls thereof - B62M 25/08: with electrical or fluid transmitting systems - B62K 2025/048: {with suspension manual adjustment details} - B62M 2025/006: {with auxiliary shift assisting means} - B62M: RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR {SINGLE-TRACK} CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES (arrangements or mounting of transmissions in vehicles in general B60K; transmission elements per se F16) - B62J: CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS - B62K: CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDECARS, FORECARS, OR THE LIKE ## Abstract A bicycle electrical front derailleur is provided that basically includes a wireless communication unit, a movable member and an electrical actuation unit. The wireless communication unit is configured to wirelessly receive a control signal. The electrical actuation unit is configured to move the movable member according to the control signal, the electrical actuation unit including an electrical actuator having an output shaft extending downwardly in a state where the bicycle electrical front derailleur is mounted to a bicycle. ## Claims ### Claim 1 A bicycle electrical front derailleur comprising: a wireless communication unit configured to wirelessly receive a control signal; a movable member; a linkage including a first link member and a second link member, the second link member being disposed closer to a bicycle frame than the first link member when the front derailleur is mounted to the bicycle frame; and an electrical actuation unit configured to move the movable member according to the control signal, the electrical actuation unit including an electrical actuator having an output shaft extending downwardly in a state where the bicycle electrical front derailleur is mounted to a bicycle, the electrical actuation unit including a printed circuit board, and the electrical actuator being electrically connected to the printed circuit board, the printed circuit board controlling the electrical actuator, the electrical actuation unit further including a gear reduction unit that is operatively connected to the output shaft of the electrical actuator to transmit rotational movement of the output shaft to the movable member via the linkage, the gear reduction unit having a rotational axis that is parallel to a rotational axis of the output shaft. ### Claim 2 (depends on 1) The bicycle electrical front derailleur according to claim 1, wherein the electrical actuator has a housing from which the output shaft extends, and the gear reduction unit is configured to be arranged downwardly with respect to the housing in the state where the bicycle electrical front derailleur is mounted to the bicycle. ### Claim 3 (depends on 1) The bicycle electrical front derailleur according to claim 1, wherein at least part of the printed circuit board is arranged adjacent to the electrical actuator. ### Claim 4 (depends on 1) The bicycle electrical front derailleur according to claim 1, wherein the electrical actuation unit includes an electrical port electrically connected to the printed circuit board, and the electrical port is configured to be detachably connected to an electrical cable to supply electrical power to the electrical actuation unit. ### Claim 5 (depends on 4) The bicycle electrical front derailleur according to claim 4, wherein at least part of the electrical port is arranged rearwardly with respect to the electrical actuator. ### Claim 6 (depends on 4) The bicycle electrical front derailleur according to claim 4, wherein at least part of the electrical port is arranged downwardly with respect to the electrical actuator. ### Claim 7 (depends on 4) The bicycle electrical front derailleur according to claim 4, wherein the electrical actuation unit is configured to receive a control signal from the electrical cable or the wireless communication unit. ### Claim 8 (depends on 1) The bicycle electrical front derailleur according to claim 1, wherein the wireless communication unit includes a wireless communicator that is configured to wirelessly receive shift signals and to transmit at least one of position data and operational data. ### Claim 9 (depends on 1) The bicycle electrical front derailleur according to claim 1, further comprising a structure configured to detachably attach the wireless communication unit. ### Claim 10 (depends on 1) The bicycle electrical front derailleur according to claim 1, further comprising a base member configured to support the electrical actuation unit with respect to the bicycle. ### Claim 11 (depends on 10) The bicycle electrical rear derailleur according to claim 10, wherein the movable member includes a chain guide and the base member that supports the chain guide with respect to the bicycle. ### Claim 12 (depends on 2) The bicycle electrical front derailleur according to claim 2, wherein the printed circuit board is connected to a position detection circuit for determining an amount of rotational movement that is outputted by the gear reduction unit.