# US 10,309,482 B2 · Damper for an automobile clutch > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,482 B2 - Document ID: US10309482B2 - Status: Granted - Kind: B2 - Application number: 15/502,232 - Filed: 2015-06-23 - Published: 2017-08-10 - Granted: 2019-06-04 - Earliest claimed: 2014-08-08 - Assignees: Valeo Embrayages - Applicants: Valeo Embrayages - Inventors: Carlos Lopez Perez - Web page: https://patentgrep.com/patent/US10309482B2 ## CPC - F16F 15/1333: {Spiral springs, e.g. lying in one plane, around axis of rotation} - F16F 15/131: the rotating system comprising two or more gyratory masses - F16F 15/1336: {Leaf springs, e.g. radially extending} - F16D 2300/22: Vibration damping - F16F 15/1213: {Spiral springs, e.g. lying in one plane, around axis of rotation} - F16F 2230/0064: using a cam - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES ## Abstract A damper for an automobile clutch, comprises input and output elements rotationally movable with respect to one another around a rotation axis (X), and a damping device interposed between the input and output elements. One of the input and output elements is equipped with a cam follower (21). The damping device has a flexible blade (17a; 17b). The flexible blade is provided with a cam surface (20) arranged to interact with the cam follower. The cam surface extends over an opening angle (A) greater than 30°. ## Claims ### Claim 1 A damper for an automobile clutch, the damper comprising: an input element and an output element rotationally movable with respect to one another around a rotation axis (X), one of the input and output elements equipped with a cam follower (21); and a damping device interposed between the input and output elements, the damping device having a flexible blade (17a; 17b; 17c; 17d) provided with a cam surface (20) arranged to interact with the cam follower, the cam surface extending over an opening angle (A) greater than 30°. ### Claim 2 (depends on 1) The damper according to claim 1, wherein the cam surface has a substantially concave shape when observed along the rotation axis (X), and wherein a concavity of the substantially concave shape being on the side of the rotation axis. ### Claim 3 (depends on 2) The damper according to claim 2, wherein the cam surface is concave over an entire length thereof. ### Claim 4 (depends on 1) The damper according to claim 1, wherein the opening angle (A) is greater than 60°. ### Claim 5 (depends on 1) The damper according to claim 1, wherein the opening angle (A) is between 45° and 115°. ### Claim 6 (depends on 1) The damper according to claim 1, wherein the flexible blade (17a; 17b; 17c; 17d) is metallic. ### Claim 7 (depends on 1) The damper according to claim 1, wherein the flexible blade (17a; 17b; 17c; 17d) comprises a stack of strips. ### Claim 8 (depends on 1) The damper according to claim 1, wherein the thickness of the flexible blade (17a; 17b; 17c; 17d) is greater than 3 mm. ### Claim 9 (depends on 1) The damper according to claim 1, wherein the flexible blade (17a; 17b; 17c; 17d) is rotationally coupled to one of the input and output elements. ### Claim 10 (depends on 1) The damper according to claim 1, wherein the cam surface (20) is arranged so that, for an angular deflection between the input element and output element (3) with respect to an inactive angular position, the cam follower (21) exerts a flexural force on the flexible blade (17a, 17b, 17c, 17d), producing a reaction force capable of returning the input and output elements toward the inactive angular position. ### Claim 11 (depends on 1) The damper according to claim 1, wherein the cam follower is a roller (21) mounted rotationally movably on one of the input and output elements. ### Claim 12 (depends on 1) The damper according to claim 1, wherein the cam follower (21) is disposed radially externally from the flexible blade (17a; 17b; 17c; 17d). ### Claim 13 (depends on 2) The damper according to claim 2, wherein the opening angle (A) is greater than 60°. ### Claim 14 (depends on 3) The damper according to claim 3, wherein the opening angle (A) is greater than 60°. ### Claim 15 (depends on 2) The damper according to claim 2, wherein the opening angle (A) is between 45° and 115°. ### Claim 16 (depends on 3) The damper according to claim 3, wherein the opening angle (A) is between 45° and 115°. ### Claim 17 (depends on 4) The damper according to claim 4, wherein the opening angle (A) is between 45° and 115°. ### Claim 18 A damper for an automobile clutch, the damper comprising: an input element and an output element rotationally movable with respect to one another around a rotation axis (X), one of the input and output elements equipped with a cam follower (21); and a damping device interposed between the input and output elements, the damping device having a flexible blade (17a; 17b; 17c; 17d) provided with a cam surface (20) arranged to interact with the cam follower, the cam surface extending over an opening angle (A) greater than 30°, the cam surface having a substantially concave shape when observed along the rotation axis (X) such that a concavity of the substantially concave shape being on the side of the rotation axis. ### Claim 19 A damper for a motor vehicle, having: a primary inertial flywheel intended to be fastened to the end of a crankshaft, and a secondary inertial flywheel, rotationally movable with respect to one another around a rotation axis X; a damper for transmitting torque and for damping rotational irregularities between the primary and secondary inertial flywheels, the damper having friction members arranged to exert a resistive frictional torque between the primary and secondary inertial flywheels upon an angular deflection between the primary and secondary inertial flywheels; the damper has a flexible blade rotationally coupled to one of the primary and secondary inertial flywheels and provided with a cam surface; and in that the damper has a cam follower carried by the other of the primary and secondary inertial flywheels and arranged to interact with the cam surface; the cam surface being arranged so that, for an angular deflection between the primary inertial flywheel and the secondary inertial flywheel with respect to an inactive angular position, the cam follower exerts a flexural force on the flexible blade, producing a reaction force capable of returning the primary and secondary inertial flywheels to the inactive angular position.