Abstract: A flow channel structure forms a first flow channel which makes a first fluid chamber and a second fluid chamber communicate with each other therethrough. The flow channel structure includes first to third plates. The first plate includes a first through hole penetrating the first plate in a thickness direction to open to the first fluid chamber. The second plate includes a second through hole penetrating the second plate in the thickness direction to open to the second fluid chamber. The third plate includes a first connecting through hole penetrating the third plate in the thickness direction. The first connecting through hole is larger in flow channel area than each of the first and second through holes. The first and second through holes are disposed in different positions from each other as seen in the thickness direction. The first connecting through hole communicates with the first and second through holes.

Abstract: A torsional vibration damping arrangement, in particular mass damper subassembly, having a carrier which can be driven in rotation and a damper mass rotatably deflectable with respect to the carrier against the restoring action of a substantially radially extending damper spring. The damper spring is fixedly clamped in the damper mass and is supported or supportable with respect to the carrier for transmitting circumferential force. The damper spring is clamped between clamping elements arranged at both sides of the damper spring in circumferential direction.

Abstract: A torsional vibration damping arrangement, comprises at least one deflection mass pendulum unit with a rotatable carrier, a deflection mass, a deformable restoring element, a supporting element which provides the carrier supporting region, wherein a distance between the carrier supporting region and the deflection mass supporting region can be varied through movement of the supporting element at the carrier, and the supporting element is preloaded in direction of a radially inner base position and is displaceable radially outward against the preloading under centrifugal force action wherein that a radial distance of the supporting element from the base position increases degressively with increasing centrifugal force action at least in one rotational speed range and/or in that a spring stiffness of the restoring element increases progressively at least in one rotational speed range through centrifugal force-induced displacement of the supporting element.

Abstract: A clutch device is provided which facilitates an operation of checking whether or not spring seats have been properly disposed and effectively prevents falling off or a change in attitude of the spring seats, thereby reducing the labor required for manufacture. A clutch device 100 includes a pressure plate 110 which presses friction plates 103 which are rotationally driven by a drive shaft against clutch plates 107. The pressure plate 110 includes clutch springs 112 and spring seats 113 disposed in receiving portions 111 having a concave shape. Each spring seat 113 has two plate-shaped arms 113a and 113b extending along the bottom 111a of the receiving portion 111 and has a C-like shape. Protrusions 114a and 114b project from the peripheries of the arms 113a and 113b. Recesses 111b into which the protrusions 114a and 114b fit are formed in an inner wall portion of each receiving portion 111 at a position near the bottom 111a of the receiving portion 111.

Abstract: A damper device including an input element to which power from a motor is transmitted; a first elastic body to which power is transmitted from the input element; a first intermediate element to which power is transmitted from the first elastic body; a second elastic body to which power is transmitted from the first intermediate element; a second intermediate element to which power is transmitted from the second elastic body; a third elastic body to which power is transmitted from the second intermediate element; and an output element to which power is transmitted from the third elastic body. The first and second elastic bodies are coil springs, and the third elastic body is an arc spring that is arranged radially inward of the first and second elastic bodies.

Abstract: A damper device including an input element to which power from a motor is transmitted; a first elastic body to which power is transmitted from the input element; a first intermediate element to which power is transmitted from the first elastic body; a second elastic body to which power is transmitted from the first intermediate element; a second intermediate element to which power is transmitted from the second elastic body; a third elastic body to which power is transmitted from the second intermediate element; and an output element to which power is transmitted from the third elastic body. A stiffness of the first elastic body is higher than a stiffness of the second elastic body.

Abstract: A torque fluctuation absorber includes a first rotating member arranged to be rotatable, a second rotating member arranged in a rotatable manner relative to the first rotating member, a coil spring for buffering a torsion between the first rotating member and the second rotating member by means of an elastic force, and a cushion member arranged at an inside of the coil spring and buffering the torsion between the first rotating member and the second rotating member by means of an elastic force, wherein the cushion member includes an elastic member formed in a columnar shape, and an abrasion resistant member partly covering a side surface of the elastic member and including a greater abrasion resistance than an abrasion resistance of the elastic member.

Abstract: A torsional vibration damper with a damper component and a damper flange part limitedly rotatable within a circumferential clearance with respect to the damper component contrary to the effect of energy accumulator elements. The damper component is formed as a guide shell radially outside and surrounds the radial outmost circumferential section of the energy accumulator elements. The damper flange part comprises circumferentially disposed compression elements. The energy accumulator elements are circumferentially arranged in-between the compression elements. Cutouts formed in the guide shell and the compression elements engage radially into the cutouts whilst facilitating circumferential clearance.

Abstract: A torque shock or vibrations caused by the rotary inertia of a hydrostatic continuously variable transmission is reduced to improve ride quality of a vehicle when excessive torque occurs in a torque transmission path between a crankshaft and a drive wheel. A motorcycle includes a hydrostatic continuously variable transmission rotatably driven by torque of a crankshaft of an internal combustion engine. A rear wheel is rotatably driven by torque from the transmission. A torque damper absorbs excessive torque occurring in a torque transmission path from the crankshaft to the rear wheel. The torque dampers include an input side torque damper disposed in an input side torque transmission path between the crank shaft and the transmission and an output side torque damper disposed in an output side torque transmission path between the transmission and the rear wheel.

Abstract: A torque converter for an automatic transmission includes a first fluid flow path for supplying a fluid to a pump cavity, a second fluid flow path for removing the fluid from the pump cavity, and a third fluid flow path for supplying a hydraulic signal to a lock-up clutch. The third fluid flow path is separate and distinct from the first fluid flow path and the second fluid flow path. A sleeve divides a stepped axial bore in the turbine output shaft into an inner stepped axial bore cavity, which is part of the third fluid flow path, and an outer stepped axial bore cavity, which is part of the first fluid flow path. The torque converter further includes an isolator assembly having a twenty degree rotational travel dampening distance.

Abstract: A joint 10 is shown for transmission of torque between an input shaft 12 and an output shaft 14. In the form shown, the joint 10 comprises an outermost helical coil spring 16 and an innermost helical coil spring 18, both of which are connected at their respective opposite ends to the input shaft 12 and to the output shaft 14. The innermost helical spring 18 is arranged to be entirely located within, and co-axially aligned with, the outermost helical spring 16 along the same centerline. The springs 16, 18 are arranged to be counter wound relative to one another to provide delivery of torque in a stabilised manner reflected in a significant reduction in the vibration observed within the joint 10 during use. The joint 10 is also arranged for transmission of thrust (or axial force) between the input shaft 12 and the output shaft 14.

Abstract: A damper mechanism 4 has a clutch plate 21 and a retaining plate 22 disposed aligned in the axial direction, a hub flange 6 disposed relatively rotatably in the axial direction between the plates 21 and 22, and a second coil spring 8 for elastically linking the plates 21 and 22 to the hub flange 6 in the rotational direction. The plates 21 and 22 have a pair of first main body components 28, and a plurality of linking components 31 that are disposed in the rotational direction between first protrusions 49 and second protrusions 57 and that link the pair of first main body components 28. The plurality of linking components 31 is disposed such that adjacent pitches are different.

Abstract: A torsional vibration damper with a damper component and a damper flange part limitedly rotatable within a circumferential clearance with respect to the damper component contrary to the effect of energy accumulator elements. The damper component is formed as a guide shell radially outside and surrounds the radial outmost circumferential section of the energy accumulator elements. The damper flange part comprises circumferentially disposed compression elements. The energy accumulator elements are circumferentially arranged in-between the compression elements. Cutouts formed in the guide shell and the compression elements engage radially into the cutouts whilst facilitating circumferential clearance.

Abstract: In a flywheel in which narrow portions to be engaged with a coil spring included in the flywheel are formed of recessed portions made by recessing the surface of a flywheel cover, the portions of a sensor plate welded to the front cover, which confront with the recessed portions are made more fragile than adjacent portions of the sensor plate. With this configuration, when the front cover is deformed, stress applied to welded portions adjacent to the recessed portions can be suppressed since the fragile portions are easily deformed. Accordingly, even if the recessed portions are formed to the surface of a flywheel cover, stress can be prevented from being concentrated on the coupling portions of the flywheel cover and the sensor plate.

Abstract: A device for damping vibrations comprising at least two coaxially arranged damper parts rotatable relative to each other to a limited extent in the circumferential direction, coupled by torque transmitting means and damping coupling means, which exhibit at least one energy accumulator unit, and forming the impingement areas for the energy accumulator units. At least one damper part forms a guide channel for the energy accumulator units. The individual impingement area on the damper part forming the guide channel for the energy accumulator units is formed by a stop element, connected in a torsion proof manner at least indirectly to the damper part and forms the abutment faces in the guide channel in the circumferential direction. The abutment face is capable of supporting the energy accumulator unit on both sides of the impingement area on the energy accumulator unit and is a part of the other damper part.

Abstract: A damper spring device is provided with a first spring and a second spring retained by a stopper in such a manner that the second spring is compressed by a preload. The preload on the second spring is greater than a preload on the first spring. The first spring and the second spring have load-deflection characteristics such that the first spring deforms when an axial load acting in the direction of compression of the first spring is not greater than a load at which a strand of the first spring is at least partially compacted and that the first spring and the second spring deform when the axial load is greater than the load at which the strand of the first spring is at least partially compacted.

Abstract: An improved power conduit for use with automatic pool cleaners particularly configured to avoid the formation of persistent coils and/or knots. Embodiments in accordance with the invention are characterized by the use of at least one axially stiff elongate member together with axially flexible and axially swivelable means for coupling said stiff member between a stationary power source fitting and a cleaner. The axially flexible means includes means for resiliently biasing adjacent stiff members to an axially aligned orientation.

Abstract: A torsional vibration damper includes: a primary mass defining a substantially, ring-shaped chamber that is divided into at least two portions; a secondary mass relatively rotatably connected to the primary mass; and a plurality of damping units disposed in the divided portion of the ring-shaped chamber for coupling the primary and secondary masses to each other in a rotatable elastic manner. Each of the damping units includes a plurality of coil springs, and outer and inner wedge-shaped friction guides. The coil springs are situated in series and disposed one after the other within the divided portions of the ring-shaped chamber. The outer and inner wedge-shaped friction guides face each other along facing surfaces thereof. Each of the facing surfaces of the outer and inner wedge-shaped friction guides are entirely slanted with respect to a radial direction of the primary mass.

Abstract: A joint 10 is shown for transmission of torque between an input shaft 12 and an output shaft 14. In the form shown, the joint 10 comprises an outermost helical coil spring 16 and an innermost helical coil spring 18, both of which are connected at their respective opposite ends to the input shaft 12 and to the output shaft 14. The innermost helical spring 18 is arranged to be entirely located within, and co-axially aligned with, the outermost helical spring 16 along the same centerline. The springs 16, 18 are arranged to be counter wound relative to one another to provide delivery of torque in a stabilised manner reflected in a significant reduction in the vibration observed within the joint 10 during use. The joint 10 is also arranged for transmission of thrust (or axial force) between the input shaft 12 and the output shaft 14.

Abstract: A torsional vibration damper includes a primary mass defining a ring-shaped chamber, a secondary mass relatively rotatably connected to the primary mass, and a damping unit for coupling the primary and secondary masses to each other in a rotationally elastic manner. The damping unit comprises a plurality of coil springs, a pair of end guides, and a friction member slidably disposed between neighboring coil springs. The friction member is configured to be rubbed against at least one of an inner wall and an outer wall of the ring-shaped chamber in response to compressions of the coil springs such that a friction force is generated in proportion to a relative rotation between the primary and secondary masses as well as to a rotational speed thereof.