Abstract: A power transmitting part for transmitting power has an annular main body section and a transmitting section. The transmitting section has a first protruding section extending outward in a radial direction from the main body section and a second protruding section extending toward a first side in an axial direction from a circumferential-direction-facing edge portion of the first protruding section.

Abstract: A first flywheel assembly a first flywheel, a second flywheel, a first spring set, a first spring seat, and a second spring set. The first spring set is arranged between the first flywheel and the second flywheel in a pre-compressed state. The first spring seat is a member that supports an end portion of the first spring set and is pushed in a radially outward direction against the first flywheel. The second spring set is a member having a lower stiffness than a stiffness of the first spring set and is arranged between the second flywheel and the first spring set in a pre-compressed state such that it acts in series with the first spring set.

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 first flywheel assembly a first flywheel, a second flywheel, a first spring set, a first spring seat, and a second spring set. The first spring set is arranged between the first flywheel and the second flywheel in a pre-compressed state. The first spring seat is a member that supports an end portion of the first spring set and is pushed in a radially outward direction against the first flywheel. The second spring set is a member having a lower stiffness than a stiffness of the first spring set and is arranged between the second flywheel and the first spring set in a pre-compressed state such that it acts in series with the first spring set.

Abstract: A power transmitting part for transmitting power has an annular main body section and a transmitting section. The transmitting section has a first protruding section extending outward in a radial direction from the main body section and a second protruding section extending toward a first side in an axial direction from a circumferential-direction-facing edge portion of the first protruding section.

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 spring seat is disclosed which is employed on a spring that serves to absorb and attenuate torsional vibrations. The spring seat includes a seat body that serves to support an end portion of the spring, and a sliding portion that is fixed to an outer side of the seat body and composed of a material that is different from that of the seat body.

Abstract: A dampening disk assembly stabilizes friction generated by friction mechanisms within a first range of torsional angle in a separated hub type of clutch disk assembly. An intermediate member (18, 20) is disposed axially between a clutch plate 31 and a retaining plate 32. The first axial side of the intermediate member is supported by the clutch plate 31. The intermediate member (18, 20) has an intermediate plate 18 and a supporting member or fixing plate 20 with a first part 71 and a supporting portion 73 at an inner circumferential portion. An output hub 3 has a flange 64 disposed axially facing the supporting portion 73. The intermediate member (18, 20) and the hub 3 are axially supported by the clutch plate 31. A first friction mechanism 8 is formed between the fixing plate or supporting member 20 and the retaining plate 32. The first friction mechanism 8 includes a friction washer 81 and a first cone spring 49.

Abstract: A dampening disk assembly 1 is provided in a clutch assembly 1 to make it possible to easily change the level of hysteresis torque when small torsion vibrations are generated. Thus, the level of hysteresis torque can easily be changed to accommodate a wide variety of vehicles. In the dampening disk assembly 1, a friction washer 48 is disposed between an input plate 32 and a hub flange 18. The friction washer 48 is engaged with the input plate 32, so that torque may be transferred from the input plate 32 to the hub flange 18. A cone spring 49 is disposed between the friction washer 48 and the input plate 32 in an axial direction to give resiliency to both members in the axial direction. A fixing plate 20 contacts the friction washer 48 in the axial direction. A spacer 80 is disposed between the fixing plate 20 and the hub flange 18 in the axial direction so as to transmit torque.

Abstract: A clutch disk assembly 1 is provided between an input shaft and an output shaft to selectively transmit rotation therebetween. The clutch disk assembly 1 is provided with a dampening mechanism 4 to provide smooth transition during engagement and disengagement of the clutch disk assembly. The dampening mechanism 4 has more durable first and second retaining plates 31 and 32 with a rectangular window portion for transmitting torque. The first and second retaining plates 31 and 32 are used to support first springs 16 of the clutch disk assembly. The first and second retaining plate 32 includes a plate main body having a disk shape and a second receptacle 36 to support first springs 16. The second receptacles 36 are formed from that plate main body. The second receptacles 36 project in an axial direction from the plate main body so as to be able to seat the first spring 16.

Abstract: A dampening disk assembly is provided with a dampening mechanism 108. The dampening mechanism 108 has a simplified structure with a spring and a friction generating mechanism, which provides a characteristic of a first step in a separated hub type dampening disk assembly. The dampening disk assembly is also provided with an output hub 104, a pair of input plates 112 and 113, an intermediate plate 109 and a first elastic member 106. The intermediate plate 109 is disposed between the pair of input plates 112 and 113. The first elastic member 106 couples the pair of input plates 112 and 113 and the intermediate plate 109 elastically in a rotary direction. The output hub 104 is disposed on an inner circumferential side of the pair of input plates 112 and 113 and the intermediate plate 109. The dampening mechanism 108 couples the output hub 104 and the intermediate plate 109 elastically in a rotary direction, and includes a first and second portion 131 and 130 and an elastic portion 107.

Abstract: A clutch disk assembly 1 includes a second plate 13, an output rotary member 4, an intermediate body 3, an intermediate member 9b, second springs 10, third springs 5 and a damper 8. The intermediate body 3 is disposed radially outside the output rotary member 4. The intermediate member 9b is disposed near the output rotary member 4 and the intermediate body 3. The second plate 13 is located on a second axial side of the intermediate body 3. The second springs 10 circumferentially and elastically couple the plate 9b and the intermediate body 3 together. The third springs 5 circumferentially and elastically couple the intermediate body 3 and the second plate 13 together. The damper 8 is axially shifted from the intermediate body 3. The damper 8 has first springs 7 circumferentially and elastically coupling the output rotary member 4 and the plate 9b together.

Abstract: A dampening disk assembly is provided to ease a control of a friction generated by two kinds of friction generating mechanisms in a separated hub type of clutch disk assembly. A second dampening mechanism 6 is a mechanism to generate a friction between a separated flange 18 and a hub 3 when both of the portions rotate relatively. The second dampening mechanism 6 includes a bushing 19 and a fixing plate 20. The bushing 19 rotates with the hub 3 in a body. The fixing plate 20 rotates with the separated flange 18 in a body. The fixing plate 20 includes a first disk-shaped part 71 and a second disk-shaped plate 73. The second disk-shaped plate 73 generates a friction when the hub 3 and the separated flange 18 rotates relatively. The first disk-shaped part 71 generates a friction when the separated flange 18 and both a clutch plate 31 and a retaining plate 32 rotate relatively. The friction generated by the first disk-shaped portion 71 is larger than that generated by the second disk-shaped portion 73.

Abstract: A clutch disk assembly 1 includes a second plate 13, an output rotary member 4, an intermediate body 3, an intermediate member 9b, second springs 10, third springs 5 and a damper 8. The intermediate body 3 is disposed radially outside the output rotary member 4. The intermediate member 9b is disposed near the output rotary member 4 and the intermediate body 3. The second plate 13 is located on a second axial side of the intermediate body 3. The second springs 10 circumferentially and elastically couple the plate 9b and the intermediate body 3 together. The third springs 5 circumferentially and elastically couple the intermediate body 3 and the second plate 13 together. The damper 8 is axially shifted from the intermediate body 3. The damper 8 has first springs 7 circumferentially and elastically coupling the output rotary member 4 and the plate 9b together.

Abstract: The invention relates to a hydraulic cement composition comprising, as a carbonation inhibitor of the cement composition, at least one compound of the formula (I):A--(Y.sub.n --H).sub.lwherein A is a polyamine residue containing 2-10 carbon atoms,Y is --C.sub.3 H.sub.6 --O--,l is a number equal to 1-8,n is a number equal to 1-4,the product of n.times.l is equal to 13-20,the active hydrogen(s) involved in the amino groups in the polyamine residue being partly or wholly substituted with the residue(s) of propylene oxide.