Abstract: A rare earth phosphate particle containing a rare earth element A, where A is Sc, Y, La, Eu, Gd, Dy, Yb, or Lu, and a rare earth element B different from the element A, where B is Sc, Y, La, Eu, Gd, Dy, Yb, or Lu. The phosphate of the element A is preferably crystalline, with at least part of the element B dissolved in the phosphate of the element A in a solid state. The phosphate of the element A preferably has a xenotime or monazite crystal structure.

Abstract: In a first embodiment, a friction engagement portion 3 of clutch disk assembly includes a driven plate 20 fixed to a clutch plate 5, a cushioning plate 21, first and second sintered alloy pads 22 and 23, and rivets 32. The cushioning plate 21 has a corrugated form allowing elastic deformation. The first sintered alloy pad 22 is arranged at the cushioning plate 21. The second sintered alloy pad 23 is fixed to the driven plate 20 having an outer peripheral edge bent for fixing the second sintered alloy pad 23. The rivet 32 has an end engaged with the second sintered alloy pad 23, is axially movable, and has the other end for fixing the cushioning plate 21 and the first sintered alloy pad 22. In a second embodiment, a pair of first and second cushioning plates 120 and 121 are opposed to each other at an outer peripheral portion of the clutch disk assembly. Sintered alloy pads 122 and 123 fixed at outer surfaces of the first and second cushioning plates 120 and 121.

Abstract: In a first embodiment, a friction engagement portion 3 of clutch disk assembly includes a driven plate 20 fixed to a clutch plate 5, a cushioning plate 21, first and second sintered alloy pads 22 and 23, and rivets 32. The cushioning plate 21 has a corrugated form allowing elastic deformation. The first sintered alloy pad 22 is arranged at the cushioning plate 21. The second sintered alloy pad 23 is fixed to the driven plate 20 having an outer peripheral edge bent for fixing the second sintered alloy pad 23. The rivet 32 has an end engaged with the second sintered alloy pad 23, is axially movable, and has the other end for fixing the cushioning plate 21 and the first sintered alloy pad 22. In a second embodiment, a pair of first and second cushioning plates 120 and 121 are opposed to each other at an outer peripheral portion of the clutch disk assembly. Sintered alloy pads 122 and 123 fixed at outer surfaces of the first and second cushioning plates 120 and 121.

Abstract: A pull-type clutch for connecting a flywheel to a transmission and having clutch discs spline fitted onto an input shaft of the transmission, a sleeve on the outer periphery of the input shaft, a release bearing fastened to the transmission end of the sleeve, a flange portion formed on the flywheel end of the sleeve and projecting toward the outer periphery, a load transmitting retainer on the sleeve pressed to the flange portion, a clutch cover connected to the flywheel and covering a pressure plate for pressing the clutch discs into engagement with the flywheel, a disc-formed spring member disposed between the clutch cover and the retainer, levers for transmitting spring force of the spring member disposed between the retainer and the pressure plate at plural circumferential locations and pins between the retainer and the clutch cover for sliding movement of the retainer relative to the clutch cover.

Abstract: A pull-type clutch which is released by pulling a release bearing toward the transmission with a releasing lever connected to a clutch pedal, includes clutch discs which are spline fitted onto an input shaft of a transmission. A sleeve part of a releasing retainer is provided on an outer periphery of the input shaft with a release bearing fastened to the transmission and of the sleeve part. A retainer part is integrally formed into one piece with the sleeve part and is located at the flywheel end of the sleeve part. A spline is provided on the sleeve part and fits into a spline groove on the clutch cover for permitting axial sliding of the releasing retainer while preventing rotation of the releasing retainer relative to the clutch cover.

Abstract: In a pull-type clutch which performs release operation through a load transmission lever disposed between a load transmission retainer and a pressure plate, the load transmission lever comprising protrusions provided on its base end portion at which the lever is in engagement with an annular groove of the retainer and projecting toward abutment surfaces of the groove.

Abstract: A pull-type clutch comprises a generally disc-shaped spring member disposed between a retainer axially shiftable in integral relation with a release bearing and a clutch cover, the spring member being supported at its circumferential edge portion by a holder portion provided on the inner periphery of the clutch cover, the inner periphery portion of the spring member being held in pressure contact with the retainer, levers disposed between the retainer and the pressure plate so that the load of the spring member acting on the retainer is magnified for transmission at a specified lever ratio between individual fulcrums of each of the levers.

Abstract: A clutch having an adjustable diaphragm spring engaging lever and a release bearing for disengaging the clutch. The clutch disc is spline fitted onto an input shaft of transmission. A sleeve, having the release bearing fastened at its transmission end, is fitted on the outer periphery of the input shaft. A load transmitting retainer is fitted on the clutch end of the sleeve. A clutch cover, covering the clutch and flywheel is mounted on the flywheel. A diaphragm spring is disposed between the clutch cover and the retainer. A clutch lever is fulcrummed at its inner end to a groove in the retainer ring and at its outer end to an adjustable member on the clutch cover for engaging and disengaging the clutch disc with the pressure plate and flywheel.

Abstract: A friction clutch comprises holes bored in a pressure plate. The holes are bored parallel to the center line of the clutch. A roll pin extends parallel to the center line and is slidably press fitted into each of the holes. The roll pin is supported in a pressure contact at both ends between the flywheel and the clutch cover. The roll pin may have a disk-shaped highly rigid friction material at one end.

Abstract: A wet clutch disc has an output shaft, a hub, a radial flange provided at the hub, a pair of side plates connected through a spring to the flange, a friction facing being adapted to be pressed onto a flywheel and connected to one of the side plates, a friction mechanism disposed radially inside the spring, a lubricating oil feed passage provided inside the output shaft for feeding the lubricating oil and an outlet for supplying the lubricating oil to the friction facing and characterized in that the output shaft is provided with a passage for the friction mechanism extending from the feed passage to the inner periphery of the hub and the hub is provided with a passage connected to the passage for the friction mechanism in the output shaft and opening at the outer periphery of the hub.

Abstract: A structure for supporting diaphragm spring in a clutch has a pressure plate; a clutch cover covering the rear of the pressure plate; a diaphragm spring disposed between the pressure plate and the clutch cover for forcing the pressure plate and provided with recesses radiately extending from the inner periphery of the spring; support means extending from the inner periphery of the clutch cover through radially outer portions of the recesses; and a pair of wire rings employed as fulcrums for the spring and supported by the support means; at least a part of surfaces of the wire rings being formed by solid lubricant material having a small coefficient of friction and contacting at least one of the clutch cover, the diaphragm spring and the support means.

Abstract: A damper disc disposing a pair of integrally interconnected side plates on both sides of an annular flange of a hub, interconnecting the side plate and the flange by means of a torsion spring, and interposing a friction member between an inner peripheral part of the annular flange and an inner peripheral part of the side plate; a friction plate and a wave spring being interposed in layers as friction members in either or both of between the annular flange and the both side plates, the friction plate being rotatably fixed to any one of the annular flange and the side plate and the wave spring being rotatably fixed to the other of them, and a mating surface of the friction plate on the side of the wave spring being formed into a waved surface corresponding to the wave spring.