# US 10,308,318 B2 · Bicycle derailleur > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,308,318 B2 - Document ID: US10308318B2 - Status: Granted - Kind: B2 - Application number: 15/602,434 - Filed: 2017-05-23 - Published: 2018-11-29 - Granted: 2019-06-04 - Earliest claimed: 2017-05-23 - Assignees: Shimano Inc. - Applicants: Shimano Inc. - Inventors: Kazutaka Niki; Takeshi Fujiwara - Web page: https://patentgrep.com/patent/US10308318B2 ## CPC - B62M 9/132: electrically or fluid actuated; Controls thereof - B62J 43/20: characterised by the mounting - B62J 43/30: for providing power to equipment other than for propulsion - B62M 9/134: Mechanisms for shifting laterally - B62J 45/421: at the pedal crank - 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 ## Abstract A bicycle derailleur is basically provided with a base member, a movable member and an electric actuator. The base member is configured to rotate together with a bicycle sprocket apparatus about a rotational axis of the bicycle sprocket apparatus. The movable member is movable relative to the base member to displace a bicycle chain. The electric actuator is configured to electrically actuate the movable member. ## Claims ### Claim 1 A bicycle derailleur comprising: a base member configured to rotate together with a bicycle sprocket apparatus about a rotational axis of the bicycle sprocket apparatus, the base member being configured to be mounted a sprocket body of the bicycle sprocket apparatus; a movable member movable relative to the base member to displace a bicycle chain; and an electric actuator configured to electrically actuate the movable member. ### Claim 2 (depends on 1) The bicycle derailleur according to claim 1, wherein the movable member protrudes from the base member in a radially outward direction with respect to the rotational axis in a mounted state where the bicycle derailleur is mounted to the bicycle sprocket apparatus. ### Claim 3 (depends on 2) The bicycle derailleur according to claim 2, wherein the movable member is configured to be disposed radially outward from sprocket teeth of the bicycle sprocket apparatus in the mounted state. ### Claim 4 (depends on 1) The bicycle derailleur according; to claim 1, wherein the movable member is pivotally arranged about a pivot axis with respect to the base member. ### Claim 5 (depends on 4) The bicycle derailleur according to claim 4, wherein the pivot axis is perpendicular to the rotational axis. ### Claim 6 (depends on 5) The bicycle derailleur according to claim 5, wherein the pivot axis extends in a tangential direction with respect to a circle centered on the rotational axis in a mounted state where the bicycle derailleur is mounted to the bicycle sprocket apparatus. ### Claim 7 (depends on 1) The bicycle derailleur according to claim 1, wherein the movable member is movably arranged between a first position and a second position in an axial direction that is parallel to the rotational axis in a mounted state where the bicycle derailleur is mounted to the bicycle sprocket apparatus, the first position being different from the second position. ### Claim 8 (depends on 7) The bicycle derailleur according to claim 7, wherein the first position corresponding to an upshifting operation and a second position corresponding to a downshifting operation. ### Claim 9 (depends on 7) The bicycle derailleur according to claim 7, further comprising a controller configured to control the electric actuator to selectively move the movable member toward one of the first position and the second position in accordance with an input signal. ### Claim 10 (depends on 9) The bicycle derailleur according to claim 9, wherein the controller is configured to control the electric actuator to move the movable member toward the one of the first position and the second position only within a predetermined rotational angle of the bicycle sprocket apparatus about the rotational axis. ### Claim 11 (depends on 9) The bicycle derailleur according to claim 9, wherein the controller is configured to control the electric actuator to maintain the movable member in the one of the first position and the second position. ### Claim 12 (depends on 9) The bicycle derailleur according to claim 9, wherein the controller is configured to maintain the movable member in the one of the first position and the second position until the controller receives the input signal to move the movable member toward the other of the first position and the second position. ### Claim 13 (depends on 9) The bicycle derailleur according to claim 9, further comprising a wireless receiver to receive the input signal for the controller to control movement of the movable member. ### Claim 14 (depends on 7) The bicycle derailleur according to claim 7, wherein the bicycle sprocket apparatus includes a first sprocket including a first sprocket body and a plurality of first sprocket teeth extending radially outward from the first sprocket body, and a second sprocket having a second sprocket body and a plurality of second sprocket teeth extending radially outward from the second sprocket body, a diameter of the second sprocket body being larger than a diameter of the first sprocket body, and the first position is closer to a first rotational plane defined by the first sprocket teeth of the first sprocket than the second position with respect to the axial direction in the mounted state. ### Claim 15 (depends on 14) The bicycle derailleur according to claim 14, wherein the movable member intersects with the first rotational plane in the first position. ### Claim 16 (depends on 14) The bicycle derailleur according to claim 14, wherein the second position is closer to a second rotational plane defined by a second sprocket teeth of a second sprocket than the first position with respect to the axial direction in the mounted state. ### Claim 17 (depends on 16) The bicycle derailleur according to claim 16, wherein the movable member intersects with the second rotational plane in the second position. ### Claim 18 (depends on 1) The bicycle derailleur according to claim 1, wherein the electric actuator is positioned radially inward of the movable member with respect to the rotational axis in a mounted state where the bicycle derailleur mounted to the bicycle sprocket apparatus. ### Claim 19 (depends on 18) The bicycle derailleur according to claim 18, wherein the bicycle sprocket apparatus includes a bicycle crank assembly including a first sprocket, a second sprocket, a crank arm and a crank axle, and the electric actuator is disposed on one of the crank arm and the crank axle. ### Claim 20 (depends on 1) The bicycle derailleur according to claim 1, further comprising a transmitting member to transmit a driving force from the electric actuator to the movable member. ### Claim 21 (depends on 20) The bicycle derailleur according to claim 20, wherein the transmitting member includes a flexible member. ### Claim 22 (depends on 1) The bicycle derailleur according to claim 1, further comprising a power supply to supply electricity to the electric actuator. ### Claim 23 (depends on 22) The bicycle derailleur according to claim 22, wherein the bicycle sprocket apparatus includes a bicycle crank assembly including a first sprocket, a second sprocket, a crank arm and a crank axle, the power supply is configured to be disposed into the crank axle.