Abstract: A damper device includes a first rotor, a second rotor, a plurality of elastic members and a stopper mechanism. The stopper mechanism includes a first stopper hole, a second stopper hole and a plurality of stop members. The first and second stopper holes are provided on both circumferential sides of each of a plurality of first window holes of the second rotor so as to circumferentially extend therefrom. One or both of the first and second stopper holes communicates at one end thereof with each first window hole and extends at the other end thereof to a position radially outside one of a plurality of second window holes of the second rotor. The stop members are fixed to the first rotor. Each stop member axially penetrates each of the first and second stopper holes and is circumferentially movable within each of the first and second stopper holes.

Abstract: A torsional vibration reduction apparatus has coil springs. The coil springs are received in paired input member side coil spring receiving portions and an output member side coil spring receiving portion. The paired input member side coil spring receiving portions comprise forward rotation side and reverse rotation side guide portions between forward rotation side and reverse rotation side spring pedestals. The output member side coil spring receiving portion comprises forward rotation side and reverse rotation side guide portions between forward rotation side and reverse rotation side spring pedestals. In forward rotation and reverse rotation, since the displacement of the coil springs under the centrifugal force is received by the guide portions and the vertical component force of the elastic force is small, sliding resistance is suppressed, the hysteresis torque is reduced, additive components are not required, and the installation positions of the coil springs cannot be restricted.

Abstract: A power transmission device includes a flywheel and a damper device. The flywheel includes a plurality of fixation holes. The damper device includes an input rotary member, an output rotary member, and a pair of first elastic members. The input rotary member and output rotary member each include a plurality of assembling holes disposed in corresponding positions to the plurality of fixation holes of the flywheel. The plurality of assembling holes are arranged in a circumferential direction such that two pairs of the assembling holes, each pair including two adjacent assembling holes, are each disposed at a larger interval than remaining assembling holes to produce a pair of accommodation spaces. A pair of first accommodation portions, accommodating the pair of first elastic members, is disposed radially outside the pair of accommodation spaces.

Abstract: A damper device includes a plurality of rotational elements, a plurality of elastic bodies, a rotary inertia mass damper and a housing that houses the plurality of rotational elements, the plurality of elastic bodies and the rotary inertia mass damper, the housing including a front cover. The rotary inertia mass damper is configured to include a planetary gear that includes a sun gear, a plurality of pinion gears, and a carrier that rotatably supports the plurality of pinion gears. The carrier is centered by either the sun gear or a member that rotates integrally with the sun gear by being radially supported by either the sun gear or the member that rotates integrally with the sun gear. In addition, the carrier is spline-engaged to the front cover when a lockup clutch is engaged.

Abstract: A drive member of a damper device includes a first input plate member and a second input plate member that rotatably support a plurality of pinion gears of a planetary gear of a rotary inertia mass damper. A driven member includes an outer teeth gear portion that meshes with the pinion gear in an outer circumferential portion thereof and is disposed between the first and the second input plate members in an axial direction so as to work as a sun gear of the planetary gear. A stopper is configured to restrict the relative rotation between the drive member and the driven member and includes a contact portion arranged in the outer circumferential portion of the driven member so as to contact with the first input plate member.

Abstract: A securing and centring device for securing fastening elements of a vibration damping device and for centring said vibration damping device on a component, such as a crankshaft. The securing and centring device may includes a securing mechanism that can be inserted into an opening of the vibration damping device and is configured to secure a fastening element inserted into the opening against falling out, a centering mechanism insertable into a further opening of the vibration damping device and into an assembly opening of said component for positioning and/or centering the vibration damping device and said component relative to each other, and a connecting member connecting the securing mechanism and the centering mechanism. A vibration damping device may include such a securing and centering device.

Abstract: A scissor gear assembly 31 has a main gear 33 and auxiliary gear 35 concentric to the main gear and in axial direction near the main gear. Further the assembly has planar annular springs 37 being interrupted at one place. At the interruption the springs have two ends 37a and 37b. The springs are present between both gears and are with one end 37a connected to the main gear 33 and with the other end 37b to the auxiliary gear 35, so that both gears are connected to each other in rotation direction via the springs. The springs 37 are completely placed radial outwards of the rotation axis 34 of the main gear 33 so space is created to assemble multiple springs. The solution is special suited for relative large size scissor gears.

Abstract: Backlash is controlled in an opposed-piston engine that includes two crankshafts disposed in a parallel, spaced-apart relationship and a gear train coupling the first and second crankshafts, the gear train including a driving gear coupled to the first crankshaft and a split gear assembly engaged with the driving gear to transfer rotation from the driving gear to the split gear assembly. The split gear assembly includes first and second gears, a spring mechanism that acts to angularly offset the first gear relative to the second gear in a first direction, and a one-way clutch mechanism that prevents relative angular movement of the first gear relative to the second gear in a second direction opposite the first direction.

Abstract: An isolating torque coupler includes a drive element assembled between annular cage elements of a driven element. The cage elements each include a plurality of aligned voids. The drive element includes a hub portion and a plurality of lobes with each of the lobes including a first edge and a second edge. Openings in the drive element are aligned with the voids of the cage elements to accommodate isolator springs. Each isolator spring is a helical coil compression spring having squared ends. A first edge of each of the lobes of the drive element is parallel to a second end of the corresponding one of the voids of the driven element. A second edge of each of the lobes of the drive element is non-parallel to a first end of the corresponding one of the voids of the driven element.

Abstract: A turbine damper assembly, for a torque converter, includes a driven plate and an intermediate plate. The driven plate engages and drives the intermediate plate through elastic drive elements. The driven plate includes an axially extended, circumferentially oriented, driven plate flange that both centers the intermediate plate with respect to the drive plate and also assists in containing the elastic drive elements in circumferential curved cavities during and after assembly of the turbine damper assembly.

Abstract: A torsional vibration damper comprises an input side and an output side which are arranged rotatably around an axis of rotation, an intermediate plate, and two elastic elements which are arranged on different circumferences around the axis of rotation, where the first elastic element is set up to transmit a power from the input side to the intermediate plate and the second elastic element is set up to transmit a power from the intermediate plate to the output side. Furthermore, the torsional vibration damper includes a single-piece retainer to support the first elastic element on a radially outer surface, while the retainer includes a contact element for engaging with one end of the first elastic element.

Abstract: A connector assembly formed by attaching two stamped housing sections to form a connector housing having a housing groove with a groove bottom and two side walls. The connector housings with spring can be used as a mechanical connector and/or as an electrical connector for numerous applications and across numerous industries. The groove geometries can easily be altered using different stamping dies.

Abstract: A damper device configured with an input element, an intermediate element to which power is transferred from the input element through a first elastic body, and an output element to which power is transferred from the intermediate element through a second elastic body. One of the output element and the intermediate element has a protruding portion projecting in an axial direction. The other one of the output element and the intermediate element has a cutout portion corresponding to the protruding portion. The protruding portion has a restricting portion that is engaged with the cutout portion in a rotation direction so as to restrict rotation of the intermediate element relative to the output element, and a support portion that is engaged with the cutout portion so that the intermediate element is supported by the output element in a radial direction.

Abstract: A torque transmission device for a motor vehicle, having a torque input element (7a), a torque output element (24), and at least one group of elastic members (10a, 10b) mounted between the torque input element (7a, 7b) and the torque output element (24) and arranged in series by means of a phasing member (30). The torque output element (24) and the phasing member (30) have first (28a, 33a) and second stop means (28b, 33b) limiting their relative rotation in two opposite rotation directions (D, R), the torque input element (7a, 7b) and the phasing member (30) having third (34, 17b) and fourth stop means (34, 16b) limiting their relative rotation in two opposite rotation directions (D, R). Additionally, the torque input (7a, 7b) and output elements (24) have fifth (29, 16a) and sixth stop means (29, 17a) limiting their relative rotation in two opposite rotation directions (D, R).

Abstract: A torsional vibration damper arrangement including a torsional vibration damper with a primary side and a secondary side rotatable with respect to the primary side around an axis of rotation against the action of a damper spring arrangement. One side of the primary side and secondary side includes two cover disk elements and a central disk element arranged between the cover disk elements. The cover disk elements are connected to one another by first connection elements radially inside the damper spring arrangement so as to be fixed axially and so as to transmit torque. The cover disk elements are connected to one another by second connection elements in such a way that they are prevented from moving axially away from one another. No torque can be transmitted between the cover disk elements by the second connection elements.

Abstract: A torsional damper (1) comprises a hub (2) coupled to a radial annular web (6); two guide washers; elastic members (9); and friction means, relative angular deflections of the guide washers and the annular web (6) being limited in a first rotation direction (D) by a first series of stops (23) of the guide washers that interact with a first series of protruding parts (25) of the annular web (6), and in a second rotation direction (R) by a second series of stops (24) of the guide washers that interact with a second series of protruding parts (26) of the annular web (6).

Abstract: A torque transmission device, comprising a hydrodynamic component, a shiftable clutch device and a vibration damper. A turbine shell of the hydrodynamic component is connected with a damper input component of the vibration damper and/or with a turbine shell hub, which is at least indirectly supported in axial direction at a damper hub through a torque-proof connection. At least one axial support surface is provided at a face of a damper component, adjacent to the torque-proof connection in an axial direction, or of the damper hub. The face is oriented away in axial direction from the torque-proof connection. The invention is characterized in that a support element is arranged at the damper component or at the damper hub. The support element includes a support surface forming an axial protrusion, extending through adjacently arranged damper components or portions of a support.

Abstract: A spring includes at least one spring portion that extends over an arc of at least 90° when projected onto a cross-sectional area perpendicular to a force direction of the spring in an unloaded condition thereof. The spring portion has an elliptical shape in the projection. A system including one or more springs is also described.

Abstract: A damper device includes: a pair of first plates axially separated from each other along a rotation axis and rotatable integrally with each other around the axis in a state where the first plates intersect the axis; a second plate including a portion positioned between the first plates, having an opening, and rotatable around the axis in a state where the second plate intersects the axis; an elastic member between the first and second plates, and elastically deformed a circumferential direction of the axis; and a third plate having a first portion positioned on an inner side of the opening and coupled to the first plates in a state where the first portion is between the first plates, and a second portion positioned on an outer side of the opening, and rotatable around the axis in a state where the third plate intersects the axis.

Abstract: A torsional vibration damping arrangement, particularly for the drivetrain of a vehicle, includes an input region (12) to be driven in rotation around an axis of rotation (A) and an output region (20), wherein a first torque transmission path (14) and parallel thereto a second torque transmission path (16) and a coupling arrangement (18) for superposing the torques conducted via the torque transmission paths (14, 16) are provided between the input region (12) and the output region (20), wherein a phase shifter arrangement (26) is provided in the first torque transmission path (14) for generating a phase shift of rotational irregularities conducted via the first torque transmission path (14) relative to rotational irregularities conducted via the second torque transmission path (16), and wherein the coupling arrangement (18) includes a coupling lever arrangement (54; 54a).

Abstract: An input shaft damper (ISD) of a transmission, may include an inertia body assembly relatively rotatably mounted on an input shaft of the transmission, and a planetary gear set mounted on the input shaft so as to receive and increase a rotational force of the input shaft and output an increased rotational force to the inertial body assembly.

Abstract: A torque fluctuation absorbing apparatus is capable of securely sealing a space housing an elastic member even on application of a centrifugal force or at the time of cooling. The torque fluctuation absorbing apparatus includes a center plate, a side plate(s) (side plate assembly) coaxial with the center plate and slidably relative to the center plate, and an elastic member housed within a space delimited by the side plate assembly to absorb torque fluctuations between the side plate assembly and the center plate. The apparatus also includes a cover member secured to the center plate and slidably pressure contacted with the side plate assembly to cover from outside a space housing the elastic member, and a suppressing section capable of suppressing the cover member from deforming under a pressure acting on the cover member when atmospheric pressure within the space housing the elastic member(s) becomes lower than outside atmospheric pressure.

Abstract: A torque converter apparatus includes a torque converter, a lock-up clutch arranged between the torque converter and an engine, and a lock-up damper arranged between the torque converter and the lock-up clutch and connected to the lock-up clutch, the lock-up damper including a plurality of springs arranged at multiple stages and separated from each other in a radial direction of the torque converter, the lock-up clutch including an outer hub and an inner hub, the outer hub extending toward the lock-up damper and supporting one of first and second frictional engagement members engageable with each other, the outer hub extending toward a first space formed between the plurality of springs in the radial direction, the inner hub extending toward the engine and supporting the other of the first and second frictional engagement members.

Abstract: A torque limiter device includes a flywheel, a clutch disc assembly, a cover plate, a pressure ring, a plurality of friction members, a plurality of rivets and a cone spring. Each of the rivets is fixed to the cover plate and includes a first head portion disposed axially between a disc portion and the cover plate. The cone spring is disposed axially between the first head portions and the pressure ring in a compressed state.

Abstract: A torque fluctuation absorber includes a center plate rotatably arranged, a side plate arranged coaxially with and rotatably relative to the center plate, an elastic member accommodated in a space surrounded by the side plate and absorbing torque fluctuations generated between the side plate and the center plate, a cover member separating the space and an outside space from each other by covering a clearance between the center plate and the side plate, and a vent portion arranged inwardly in a radial direction of the side plate relative to the cover member and providing a ventilation between the space and the outside space.

Abstract: A damper device configured with an input element, an intermediate element to which power is transferred from the input element through a first elastic body, and an output element to which power is transferred from the intermediate element through a second elastic body. One of the output element and the intermediate element has a protruding portion projecting in an axial direction. The other one of the output element and the intermediate element has a cutout portion corresponding to the protruding portion. The protruding portion has a restricting portion that is engaged with the cutout portion in a rotation direction so as to restrict rotation of the intermediate element relative to the output element, and a support portion that is engaged with the cutout portion so that the intermediate element is supported by the output element in a radial direction.

Abstract: A torsion vibration damping apparatus can prevent the strengths of its projection portions from being decreased even if the torsion vibration damping apparatus is made small in size, and can damp torsion vibration caused by a transitional torque when a hub member is rotated in the positive side relatively rotated with respect to a rotation member, thereby making it possible to enhance a damping property of the torsion vibration. The projection amount of a projection portion 40A circumferentially projecting in the positive side from the radially center axis O of the projection portion of a hub flange 40 is formed smaller than the projection amount of the projection 40A circumferentially projecting in the negative side from the radially center axis O of the projection portion.

Abstract: A system for absorbing vibration created by operation of an engine of the present invention includes a first plate driven by an engine shaft and a torque transmitting device for transferring torque from the engine shaft to a transmission input shaft. The system includes a first vibration absorber and a second vibration absorber. The first vibration absorber includes at least one selectively moveable mass. The second vibration absorber includes at least one biasing member and generally opposing ends. The first vibration absorber is configured to absorb vibrations created at a first harmonic of the engine and the second vibration absorber is configured to absorb vibrations created at multiple harmonics of the engine.

Abstract: A torque limiting device includes: a clutch disc clamp plate 17 having a surface area 13 where the surface and the outer area surface of the flywheel press or come in contact with each other, and is provided with an opening 16 at the center middle part of the clutch disc clamp plate 17 so that a concave space 14 is formed between the clutch disc clamp plate 17 and the fly wheel 2 when the clutch disc clamp plate 17 is fastened to the fly wheel 2; a clutch disc 18 fitted in the concave space, and connected to the driven apparatus; a clutch pressing plate 22 fitted between the clutch disc 18 and the fly wheel 2; and, at least one pressing means fitted to and in the flywheel 2 and presses the clutch pressing plate 22 in a surface contact condition.

Abstract: A torsional vibration damper assembly for a hydrodynamic coupling device, in particular a torque converter, comprises a primary side having a plurality of cover disk elements, a secondary side which is rotatable with respect to the primary side about an axis of rotation against the action of a plurality of damper springs, a central disk element engaging between the cover disk elements, and a turbine wheel having a turbine wheel shell. The plurality of cover disk elements are fixedly connected to one another on the radial outer side of the damper springs, and a cover disk element located directly adjacent to the turbine wheel shell is fixedly connected to the turbine wheel shell on the radial inner side of the damper springs by connection elements of a first set of connection elements. The connection elements of the first set of connection elements do not produce a fixed connection between the cover disk elements on the radial inner side of the damper springs.

Abstract: A damper mechanism for a clutch includes a first rotary body, a second rotary body, and an elastic member. The first rotary member includes a first member, a second member, and first and second connecting sections. The second rotary body is configured between the first and second members in an axial direction and rotatably configured relative to the first rotary body. The elastic member is rotatably configured between the first and second connecting sections to connect the first and second rotary bodies elastically. The second rotary body includes first and second protruding sections being arranged between the first and second connecting sections such that the first and second protruding sections contact the connecting sections. The first member includes a pair of first holes being configured with the rotational axis between the first holes for positioning pins being inserted in the first holes during an assembly.

Abstract: A torsional damper includes a torque limiter and a damper. The torque limiter includes at least two friction members, allows transmission of torque, and prohibits transmission of excessive torque. The damper absorbs torsional vibration through resilient deformation of a spring. The torque limiter is a wet torque limiter in which the friction members are arranged in an oil chamber filled with lubricating oil. The damper is a dry damper in which the spring is not immersed in the lubricating oil.

Abstract: A damper for a torque converter includes an input flange with a first spring guiding portion and arranged for connection to a cover for the torque converter, an output flange with a second spring guiding portion and arranged for connection to an input shaft for a transmission, and an intermediate flange. The intermediate flange includes at least two plates. The first and second spring guiding portions are disposed axially between the plates. In some example embodiments, the first and second spring guiding portions are radially aligned and circumferentially offset.

Abstract: A vibration damper comprising at least two damper assemblies connectable in series, coupled with one another through a floating intermediary flange, and torque transmission devices and/or damping coupling devices and rotation angle limiting devices between the floating intermediary flange and a damper component of one of the damper assemblies, wherein the damper component is disposed in a force flow in front and/or behind the floating intermediary flange.

Abstract: A spacer assembly for a series damper, including: at least one fastening element with protrusions arranged to be fixedly secured to first and second cover plates for the damper; and at least one spacer element fixedly secured to the at least one fastening element and arranged to be axially disposed between the second cover plate and a flange for the damper. The at least one fastening element is arranged to be partially rotatable with respect to the flange. A damper assembly, including: a first damper with first and second cover plates and a flange; and a modularity spacer assembly including at least one fastening element fixedly secured to the first and second cover plates and partially rotatable with respect to the flange and at least one annular spacer element fixedly secured to the at least one fastening element and axially disposed between the second cover plate and the flange.

Abstract: A damper mechanism has a first rotating body, a second rotating body, at least one first elastic member, and at least one second elastic member. The second rotating body is disposed rotatably with respect to the first rotating body. The first elastic member is disposed so as to link elastically the first rotating body and the second rotating body in the rotation direction, and to operate only on the positive side of the torsional characteristics. The second elastic member is disposed so as to link elastically the first rotating body and the second rotating body in the rotation direction, and operate only on the negative side of the torsional characteristics.

Abstract: A flywheel device includes a mass-side rotor including a mass ring and a pair of holder plates connected to both sides of the mass ring. The mass-side rotor is connected to a crankshaft with a drive plate therebetween. Between the mass-side rotor and the drive plate, a positioning apparatus for positioning those coaxially with each other is provided. The positioning apparatus includes: an annular positioning protrusion which is press formed in at least one of the pair of holder plates to project laterally outward therefrom, and which is disposed coaxially with the mass-side rotor; and a positioning recessed portion which is press formed in the drive plate coaxially with the crankshaft, and which is fitted to the positioning protrusion. Accordingly, it is possible to enable coaxial positioning of the mass-side rotor and the drive plate without performing burdensome machining on the mass ring for forming a positioning apparatus.

Abstract: A damper mechanism includes a first flywheel, an output plate, a first spring assembly and a second spring assembly. The first spring assembly is disposed between a first support part and a transmission part in a preliminarily compressed state. The second spring assembly is disposed between a second support part and the transmission part in a preliminarily compressed state. The stopper part is disposed for making contact with the first spring assembly and the second spring assembly in the rotational direction. Gaps are reliably produced in the rotational direction between the stopper part and both of the first spring assembly and the second spring assembly in a neutral state of applying no external force to the first flywheel and the output plate.

Abstract: A damper device includes a first rotation member coupled to an engine; a second rotation member coupled to a drive member driven by power generated from the engine and capable of rotating relative to the first rotation member; and a coil spring configured to transmit the power between the first rotation member and the second rotation member, and absorb a torque variation between the first rotation member and the second rotation member, wherein the coil spring has a hollow portion that is an internal area and an outline portion that is an outer area on a cross-sectional shape on a plane including a centerline of the coil spring, the hollow portion having lower rigidity and lower density than those of the outline portion. Accordingly, the damper device can reduce the influence caused by the centrifugal force.

Abstract: A torsion damper including a plurality of elastic elements, a first plate drivingly engaged with the plurality of elastic elements and adapted to drivingly engage with a transmission shaft, a gear, and a second plate drivingly engaged with the gear and the plurality of elastic elements. At least one of the first or second plate is adapted to hydraulically seal with respect to a housing for the transmission. The gear may be adapted to be a power take-off gear for the transmission.

Abstract: A torsion vibration damping apparatus can prevent the strengths of its projection portions from being decreased even if the torsion vibration damping apparatus is made small in size, and can damp torsion vibration caused by a transitional torque when a hub member is rotated in the positive side relatively rotated with respect to a rotation member, thereby making it possible to enhance a damping property of the torsion vibration. The projection amount of a projection portion 40A circumferentially projecting in the positive side from the radially center axis O of the projection portion of a hub flange 40 is formed smaller than the projection amount of the projection 40A circumferentially projecting in the negative side from the radially center axis O of the projection portion.

Abstract: A clutch unit including a torsional vibration damper and having at least friction clutch, but can have two friction clutches combined into a twin clutch. The torsional vibration damper includes an input component that extends axially over the at least one friction clutch at the outer circumference of the friction clutch, so that a counterpressure plate of the at least one friction clutch is disposed axially between the drive engine and energy accumulators carried by the torsional vibration damper. Thus, the clutch unit has a smaller axial extent and can be accommodated in limited installation spaces.

Abstract: An intermediary flange for coupling spring units of damper assemblies connected in series, the intermediary flange comprising: radially extending bars with contact and support surfaces oriented in circumferential direction opposite to one another for supporting end portions of the spring units of the different damper assemblies. The bars are formed by particular bar elements which are aligned and fix in a circumferential direction with respect to their relative positions through attachment at annular disc shaped lateral components axially disposed on both sides.

Abstract: A torsion damper including: a plurality of springs; a first plate with a central axis; and a second plate with a central axis. The plurality of springs displaces the first and second plates so that the central axis for the first plate is radially offset from the central axis for the second plate. In one embodiment, the radial offset between the central axis for the first plate and the central axis for the second plate is fixed. In another embodiment, the first plate comprises a central bore and the second plate comprises an extruded cylinder; and the fixed alignment is maintained by contact between the central bore and the extruded cylinder.

Abstract: The powertrain includes an engine having a crankshaft, and a transmission having a transmission input member. A damper assembly is included that has an engine-side cover plate facing the engine, a transmission-side cover plate facing the transmission, and a retaining member between the cover plates. Resilient members are positioned between the engine-side cover plate and the transmission-side cover plate and supported by the retaining member. The engine-side cover plate is directly connected to the crankshaft for common rotation therewith.

Abstract: The present invention is a double path torsion isolator for use in conjunction with a torque converter. Each of the two vibration paths includes a flange with a spring connection to each of the torque converter cover and an output connection attached to the transmission shaft. The torque converter turbine is connected to one of the flanges to provide a different frequency to the associated vibration path. When the lockup clutch is engaged, the engine vibration is divided along the two vibration paths toward the common output connection. The vibration frequency of the paths are adjusted so that the frequencies of the two paths are 180° out of phase at the output connection providing a vibration cancellation effect to the output connection.

Abstract: A torsional shock absorbing apparatus is constructed to have the outer peripheral portions of first spring seats move along the outer supporting edge portions of the side plate when the hub is twisted with respect to the side plate in the positive rotation side, and to have the outer peripheral portions of second spring seats move along the outer supporting edge portions when the hub is twisted with respect to the side plate in the negative rotation side. The sliding resistance of the first spring seat and the outer supporting edge portions is larger than the sliding resistance of the second spring seat and the outer supporting edge portions.

Abstract: A torsion vibration damper for a drive train of a motor vehicle, in particular a drive train of a hybrid vehicle, comprising: a spring support and a force transmission flange configured rotatable relative to the spring support, wherein at least one compression spring is provided between the spring support and the force transmission flange for transferring a mechanical torque, wherein a housing of the spring support is configured so that in a radial direction of the torsion vibration damper, at least one longitudinal end of the compression spring is supported at/in the spring support housing and/or a clearance remains between windings of a center section of the compression spring and a wall of the spring support.

Abstract: A transmission system including a damper having a hysteresis package and a flange, wherein the flange includes a first set of splines, an input shaft having a second set of splines arranged about an interior of the input shaft, wherein the first set of splines form an engagement with the second set of splines for transferring torque between the input shaft and the flange, wherein grease is included between the first and second sets of splines for lubricating the engagement of the input shaft and the flange, and a grease trap mounted to the flange located between the input shaft and the hysteresis package for restricting the grease from traveling radially down the flange and into the hysteresis package.

Abstract: A torsional vibration damper arrangement such that an excessive radially outward flexing of spring units is effectively prevented while torsional vibrations occurring at low torques are nevertheless sensitively damped and the corresponding spring unit is protected against overloading at the same time.