# US 2014/0197005 A1 · Device For Locking An Automatic Gearbox Of A Motor Vehicle In The Park Position > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197005 A1 - Document ID: US20140197005A1 - Status: Published application - Kind: A1 - Application number: 14/234,302 - Filed: 2012-07-20 - Published: 2014-07-17 - Earliest claimed: 2011-07-22 - Assignees: Dura Automotive Systems, Inc. - Inventors: Sebastien Maitre - Web page: https://patentgrep.com/patent/US20140197005A1 ## CPC - B60T 1/12: acting otherwise than by retarding wheels, e.g. jet action - B60T 1/005: {by locking of wheel or transmission rotation} - B60T 1/062: {acting on transmission parts} - F16H 63/3416: {Parking lock mechanisms or brakes in the transmission} - B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES - F16H: GEARING ## Abstract A carriage acted-on by a control system controlled by a part of the gearbox, so as to be moved sideways in relation to a locking rod able to interoperate with a toothed crown built into the said gearbox, with the said carriage being coupled to means operated by an actuator so as to be moved, if necessary, into a fixed position of the control system, characterized by the fact that the means consist of two superimposed compact levers and mounted so as to pivot on an axis against a torsion spring, with one of the levers being coupled to the carriage while the other lever is coupled to the control system. ## Claims ### Claim 1 A device for locking a motor vehicle automatic gearbox in Park position, incorporating a carriage acted-on by a control system controlled by a part of the gearbox, so as to be moved sideways in relation to a locking rod able to interoperate with a toothed crown built into the said gearbox, with the said carriage being coupled to a mechanism actuated by an actuator so as to be moved, if necessary, into a fixed position of the control system, characterized by the fact that the mechanism comprises two superimposed compact levers and are mounted so as to pivot on the same axis against a torsion spring mounted on the said pin, with one of the levers being coupled to the carriage while the other lever is coupled to the control system. ### Claim 2 (depends on 1) The device according to claim 1, characterized by the fact that the spring is mounted on the pivot pin between the two levers and to enable a simultaneous angular movement of the said levers, or of one of the levers in relation to the other lever in travel limitation position. ### Claim 3 (depends on 1) The device according to claim 1, characterized by the fact that the control system lever has an indexing finger able to interoperate—according to a selected position of the control system—with complementary shapes in a mounting plate, in which the said control system lever and the carriage lever are mounted with pivoting capability. ### Claim 4 (depends on 1) The device according to claim 1, characterized by the fact that the carriage levers interoperates with a locking pin operated by the actuator. ### Claim 5 (depends on 1) The device according to claim 1, characterized by the fact that the selected functions of the control system are the neutral point, fourth and reverse gear. ### Claim 6 (depends on 1) The device according to claim 1, characterized by the fact that, when the set of control system and carriage levers is positioned in the neutral point position, the control system is in neutral point/fourth/reverse gear position, and the actuator is not powered; a clearance of a few millimeters occurs between the locking pin and the carriage lever. ### Claim 7 (depends on 1) The device according to claim 1, characterized by the fact that, when the set of control system and carriage levers is in fourth position, the control system is in fourth position, and the actuator is not powered, the carriage withdraws in relation to the locking rod, with the carriage lever being driven angularly directly by the control system lever, via the spring, with the said levers and being indexed in fourth position in the mounting plate. ### Claim 8 (depends on 1) The device according to claim 1, characterized by the fact that, when the set of control system and carriage levers is in reverse gear position, the control system is in reverse gear position and the actuator is not powered, the carriage lever is blocked by the locking pin, while the control system lever is moved angularly against the spring, to be indexed in reverse gear position in the plate. ### Claim 9 (depends on 1) The device according to claim 1, characterized by the fact that, when the set of control system and carriage levers is in park position, the locking rod is not engaged in a notch of the toothed wheel, the control system is in reverse gear position and the actuator is powered, the spring absorbs the movement between the control system lever indexed in reverse gear position in the plate, and the carriage lever bears against the locking pin moved by the said actuator. ### Claim 10 (depends on 1) The device according to claim 1, characterized by the fact that, when the set of control system and carriage levers is engaged in the park position, the locking rod is engaged in a notch of the toothed crown, the control system is in the reverse gear position, and the actuator is powered, the control system lever is indexed in the reverse gear position in the plate, and the carriage is brought forward onto the locking rod under the effect of movement of the carriage lever bearing against the locking pin when the power to the actuator stops. ### Claim 11 (depends on 1) The device according to claim 1, characterized by the fact that the carriage lever has a shoulder protruding from its base, that is engaged in an opening in the control system lever, to create an area of direct contact.