# US 2014/0190283 A1 · Friction controlled damper for a torque transmission device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190283 A1 - Document ID: US20140190283A1 - Status: Published application - Kind: A1 - Application number: 14/148,907 - Filed: 2014-01-07 - Published: 2014-07-10 - Earliest claimed: 2013-01-07 - Assignees: Schaeffler Technologies AG & Co. KG - Applicants: Schaeffler Technologies GmbH & Co. KG - Inventors: Markus Steinberger; Matthew Payne - Web page: https://patentgrep.com/patent/US20140190283A1 ## CPC - F16D 3/14: combined with a friction coupling for damping vibration or absorbing shock - F16F 15/123: Wound springs {(F16F15/1213, F16F15/1216, F16F15/127 take precedence)} - F16F 15/129: characterised by friction-damping means ({F16F15/1202, F16F15/1238} , F16F15/131 take precedence) - B60K 17/28: characterised by arrangement, location, or type of power take-off - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES ## Abstract A flange forming an input for the device and including a damper stop tab extending radially outward; a plate including first and second curved slots; and a curved friction assembly including a first end disposed in the first curved slot, a second end disposed in the second curved slot, at least one curved engagement plate including an engagement tab extending radially inward, at least one curved friction plate rotationally fixed to the plate, and a resilient element urging the at least one curved engagement plate and the at least one curved friction plate into contact. The device includes at least one elastic element engaged with the flange. ## Claims ### Claim 1 A torque transmitting device, comprising: a flange forming an input for the device and including a damper stop tab extending radially outward; a plate including first and second curved slots; a curved friction assembly including: a first end disposed in the first curved slot; a second end disposed in the second curved slot; at least one curved engagement plate including an engagement tab extending radially inward; at least one curved friction plate rotationally fixed to the plate; and, a resilient element urging the at least one curved engagement plate and the at least one curved friction plate into contact; and at least one elastic element engaged with the flange. ### Claim 2 (depends on 1) The torque transmitting device of claim 1, wherein: for first torque applied to the flange in a rotational direction at a first magnitude, the flange is arranged to rotate with respect to the plate in the rotational direction such that: the damper stop tab contacts the engagement tab; the flange displaces the at least one curved engagement plate in the rotational direction; and, frictional engagement of the at least one curved engagement plate with the at least one curved friction plate dissipates at least a portion of the first torque to dampen the rotation of the flange in the first rotational direction. ### Claim 3 (depends on 2) The torque transmitting device of claim 2, wherein for second torque applied to the flange in the rotational direction and at a second magnitude, greater than the first magnitude, the flange is arranged to rotate with respect to the plate in the rotational direction such that: the damper stop tab contacts the plate; and, the second torque is transmitted to the plate in the rotational direction. ### Claim 4 (depends on 1) The torque transmitting device of claim 1, wherein the resilient element is curved in a cross-section taken along a line orthogonal to an axis of rotation for the device. ### Claim 5 (depends on 1) The torque transmitting device of claim 1, wherein the resilient element is bowed in an axial direction such that radially inner and outer edges of the resilient element are non-planar orthogonal to an axis of rotation for the device. ### Claim 6 (depends on 1) The torque transmitting device of claim 1, wherein: the at least one engagement plate includes a plurality of engagement plates; or, the at least one friction plate includes a plurality of friction plates. ### Claim 7 (depends on 1) The torque transmitting device gear of claim 1, wherein: the at least one engagement plate includes a plurality of engagement plates; the at least one friction plate includes a plurality of friction plates; and, respective engagement plates alternate with respective friction plates in an axial direction. ### Claim 8 (depends on 1) The torque transmitting device of claim 1, further comprising first and second cover plates fixedly secured to the plate and in contact with the circumferentially curved friction assembly. ### Claim 9 (depends on 1) The torque transmitting device of claim 1, wherein the torque transmitting device is a power take off gear. ### Claim 10 A torque transmitting device comprising: a flange forming an input for the device and including a damper stop tab extending radially outward; a plate including first and second curved slots; a curved friction assembly including: at least one curved engagement plate: including an engagement tab extending radially inward and at least partially circumferentially aligned with the damper stop tab; at least partially rotatable with respect to the plate; and, at least partially disposed in the first and second curved slots; at least one curved friction plate: rotationally fixed to the plate; at least partially disposed in the first and second curved slots; and, in contact with the at least one curved engagement plate; and, a resilient element: in contact with one of the at least one curved engagement plate or the at least one curved friction plate; and urging the one of the at least one curved engagement plate or the at least one curved friction plate into contact with the other of the at least one curved engagement plate or the at least one curved friction plate; and at least one elastic element engaged with the flange, wherein: the flange is at least partially rotatable with respect to the plate such that the damper stop tab is engageable with the engagement tab. ### Claim 11 (depends on 10) The torque transmitting device of claim 10, wherein for first torque applied to the flange in a rotational direction at a first magnitude, the flange is arranged to rotate with respect to the plate in the rotational direction such that: the damper stop tab contacts the engagement tab; and, the flange displaces the at least one curved engagement plate in the rotational direction. ### Claim 12 (depends on 11) The torque transmitting device of claim 11, wherein for second torque applied to the flange in the rotational direction and at a second magnitude, greater than the first magnitude, the flange is arranged to rotate with respect to the plate in the rotational direction such that: the damper stop tab contacts the ring gear; and, the second torque is transmitted to the plate in the rotational direction. ### Claim 13 (depends on 10) The torque transmitting device of claim 10, wherein the at least one engagement plate includes: a first circumferential end disposed in the first curved slot; and, a second circumferential end disposed in the second curved slot. ### Claim 14 (depends on 10) The torque transmitting device of claim 10, wherein the at least one friction plate includes: a first circumferential end disposed in the first curved slot; and, a second circumferential end disposed in the second curved slot. ### Claim 15 (depends on 10) The torque transmitting device of claim 10, wherein: the at least one engagement plate includes a plurality of engagement plates; or, the at least one friction plate includes a plurality of friction plates. ### Claim 16 (depends on 10) The torque transmitting device of claim 10, further comprising first and second cover plates fixedly secured to the plate and in contact with the curved friction assembly. ### Claim 17 (depends on 10) The torque transmitting device of claim 10, wherein the torque transmitting device is a power take off gear. ### Claim 18 A power take off gear comprising: a flange forming an input for the device and including a damper stop tab extending radially outward; a ring gear including: a cavity opening to an inner circumference of the ring gear; first and second circumferentially curved slots open to the cavity; and, third and fourth circumferentially curved slots radially outward from the first and second curved slots and open to the cavity; a circumferentially curved friction assembly including: at least one circumferentially curved engagement plate: including an engagement tab extending radially inward; and, at least partially disposed in the cavity and the first and second circumferentially curved slots; at least one circumferentially curved friction plate: rotationally fixed to the ring gear; and, at least partially disposed in the cavity and the third and fourth circumferentially curved slots; and, a resilient element urging the at least one circumferentially curved engagement plate and the at least one circumferentially curved friction plate into contact; and at least one elastic element engaged with the flange and the first and second cover plates, wherein: for first torque applied to the flange in a rotational direction at a first magnitude, the flange is arranged to rotate with respect to the ring gear in the rotational direction such that: the damper stop tab contacts the engagement tab; the flange displaces the at least one circumferentially curved engagement plate in the rotational direction; and, frictional engagement of the at least one circumferentially curved engagement plate with the at least one circumferentially curved friction plate dissipates at least a portion of the first torque to dampen the rotation of the flange in the first rotational direction. ### Claim 19 (depends on 18) The power take off gear of claim 18, wherein for second torque applied to the flange in the rotational direction and at a second magnitude, greater than the first magnitude, the flange is arranged to rotate with respect to the ring gear in the rotational direction such that: the damper stop tab contacts the ring gear; and, the second torque is transmitted to the ring gear in the rotational direction. ### Claim 20 (depends on 18) The power take off gear of claim 18, wherein the at least one engagement plate includes a portion circumferentially aligned with the third and fourth slots.