# US 9,039,551 B2 · Rear derailleur device for a bicycle shifting system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,039,551 B2 - Document ID: US9039551B2 - Status: Granted - Kind: B2 - Application number: 13/680,252 - Filed: 2012-11-19 - Published: 2013-05-23 - Granted: 2015-05-26 - Earliest claimed: 2011-11-18 - Assignees: SRAM Deutschland GmbH - Applicants: SRAM Deutschland GmbH - Inventors: Robert Böhm; Tobias Harcke; Andreas Benz; Oliver Rodegro - Web page: https://patentgrep.com/patent/US9039551B2 ## CPC - B62M 9/124: Mechanisms for shifting laterally - B62M 9/1244: limiting or positioning the movement - 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) ## 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. ## Claims ### Claim 1 A rear derailleur device for a bicycle shifting system, comprising: a base body fastenable to a bicycle frame; a movable element coupled to the base body and displaceable in relation thereto; a chain guide device coupled to the movable element and pivotable around a pivot axis; a first biasing element by which the chain guide device is biased around the pivot axis in a starting position in relation to the movable element, wherein the chain guide device is pivotable against the bias of the first biasing element from the starting position in different operating positions around the pivot axis; and at least one locking device for locking the chain guide device in at least one locking position that is different from the starting position in relation to the movable element, the locking device including a locking element displaceable between a passive position, in which the chain guide device is released in relation to the movable element, and at least one active position, in which the chain guide device is held in the at least one locking position. ### Claim 2 (depends on 1) The rear derailleur device according to claim 1, the locking device including at least one contacting element engageable with the locking element in the at least one locking position to lock the chain guide device. ### Claim 3 (depends on 2) The rear derailleur device according to claim 2, the locking element disposed on one of the movable element and the chain guide device, and the contacting element disposed on the other of the movable element and the chain guide device. ### Claim 4 (depends on 1) The rear derailleur device according claim 1, the locking element displaceable in the direction of the pivot axis or parallel in relation thereto. ### Claim 5 (depends on 1) The rear derailleur device according to claim 1, wherein the locking element is displaceable in a transverse direction in relation to the pivot axis in an orthogonal plane in relation to the longitudinal axis. ### Claim 6 (depends on 1) The rear derailleur device according to claim 1, wherein the locking element is pivotable around an axis of rotation that is not parallel in relation to the pivot axis. ### Claim 7 (depends on 1) The rear derailleur device according to claim 1, wherein the locking element is displaceable along a longitudinal axis between the active position and the passive position. ### Claim 8 (depends on 1) The rear derailleur device according to claim 1, wherein the locking element is biased in the passive position by a second biasing element. ### Claim 9 (depends on 1) The rear derailleur device according to claim 1, wherein the locking element includes a push bolt that has a contact area or a hold profile by which it engages in the locking position in a positive or non-positive manner for locking the chain guide device in relation to the movable element. ### Claim 10 (depends on 9) The rear derailleur device according to claim 9, wherein the push bolt includes a contact surface or an actuation projection for manual operation. ### Claim 11 (depends on 1) The rear derailleur device according to claim 1, wherein the locking element includes a swing bracket that is pivotable between the locking position and the passive position. ### Claim 12 (depends on 1) The rear derailleur device according to claim 1, wherein the locking element is fixable in its locking position by one or more of biasing, wedging, and latching. ### Claim 13 (depends on 1) The rear derailleur device according to claim 1, wherein a damping device is provided between the movable element and the chain guide device for damping of relative movement therebetween. ### Claim 14 (depends on 13) The rear derailleur device according to claim 13, wherein the damping device includes a friction device for applying frictional forces during the pivot action of the chain guide device in relation to the movable element.