Abstract: A pressure plate for pressing the friction facing of a clutch disc to the flywheel is connected to an operating part through a mechanical link mechanism. A part to be detected which moves by the extent corresponding to the shift of the pressure plate in the clutch axial direction is disposed in the link mechanism. A contact-free sensor for detecting the part to be detected is disposed in the stationary part of the clutch, and when the clutch is connected with the abrasing facing worn to a specific limit, the sensor is designed to detect the part to be detected. There is a control part for receiving the detection signal from the sensor, and a display part is provided to tell that the control part has received the detection signal.

Abstract: The friction device of damper disc of the invention comprises an output member, an input member, springs for coupling the two, and friction mechanisms disposed between the input member and output member. The friction mechanism comprises annular input side and output side friction members, and the input side friction member is located between the output member and the output side friction member.

Abstract: A clutch cover assembly for passenger car or the like comprising a pressure plate (10, 113) having a series of projections (11, 125) and a damper member (20,127) for a gradual engagement. According to the first aspect of the invention, the damper member is in the form of a series of wave wires forming into a bow-shaped wire rod alonging in the circumferential direction and having projections rising in an axial direction for preventing a partial abrasion of the projections (11, 125) or the like. According to the second aspect of the invention, fulcrum portions (128) are formed on the projection (125) for pivotting the outer periphery of the diaphragm spring (114) while the clutch is being engaged so as to prevent the entire compression of the damper member (127) and as to precise the positioning of distance (L2) between the fulcrums (P1) and (P2).

Abstract: A clutch facing (1) having an annular friction material (3) and reinforcing plate (4) integrally connected to the friction material (3) characterized by that the reinforcing plate (4) having substantially the same shrinkage as the friction material has, an annular rib (6) concentrically formed on the connecting surface (5) of the reinforcing plate (4), and radial ribs (7) formed on the connecting surface (5) and crossing the annular rib (6).

Abstract: A friction material (1) comprising a flame sprayed metal film (4) in an amount of 10 mg/cm.sup.2 which is formed on at least whole range of outer peripheral side of an annular friction surface (3) provided at center with large diameter hole (2), of which radial length (B) is one-third of radial length (A) from outer periphery of said friction surface (3) to said large diameter hole (2).

Abstract: A clutch disc including a pad-type ceramic metal friction member fixed by a plurality of rivets to the surface of a driven plate which functions as an inputside member of the clugch disc, and an axially elastically deformable cushioning plate interposed between the friction member and the driven plate, wherein the rivets are disposed in corresponding holes opening through the surface of the friction member.

Abstract: A clutch disc assembly comprising a hub, an outer flange formed on the hub; clutch plate and retaining plate with respective circumferential openings in the plates and a large diameter spring disposed in the openings, characterized by that the outer flange has a circumferentially opening larger than the openings in the plates; the large diameter spring having a hat-shaped first spring seat having a flange portion, a cylindrical portion and a bottom portion; a small diameter spring having a portion disposed in the cylindrical portion; a second spring seat; a coil spring seat for the second spring seat having an outer periphery being in contact with the flange portion of the first spring seat when the relative movement exceeds a predetermined value; and claw portions formed at both sides edges of the openings on the plates.

Abstract: A pull-type clutch including a pressing force transmission lever, an inner peripheral end of which is in contact with a retainer connected to a release bearing, and an approximately annular adjusting ring for adjusting clearances produced by wear of the clutch facing and which is in contact with a radial outside end of the lever and screwed into an inner peripheral surface of the clutch cover. An adjuster is provided on an inner surface side of the adjusting ring and causes the adjusting ring to rotate by means of rotation of the adjuster so that the adjusting ring can move axially toward a pressure side. A rotation drive is provided which is driven by the retainer moved in the clutch axial direction by clutch engaging and releasing operations, when the clutch facings are worn, so as to adjust the adjuster.

Abstract: A torque converter device having an impeller linked to the outer circumference of the front cover, a turbine located between the front cover and the impeller, a directly coupled clutch, for engagement with an inner surface of the front cover through a friction linkage, position between the outer circumferential part of the turbine and the outer circumferential part of the front cover, an output clutch disposed between the inner circumferential part of the turbine and the inner circumferential part of the front cover and in a space filled with working fluid radially inside the directly coupled clutch, the output clutch being composed of multidisc friction clutch, the output unit of the directly coupled clutch and the output unit of the turbine being linked to the input unit of the output clutch, and the output unit of the output clutch being linked to an output shaft.

Abstract: A lock-up damper device for a torque converter comprising a piston clutch plate slidable in axial direction and equipped with a friction facing pressed on a front cover and a driven plate interconnected to a turbine in between the front cover and the turbine. The piston clutch plate and the driven plate are coupled to each other, for relative rotation by torsion springs arranged longitudinal in circumferential direction of such plates. The torsion springs are installed at outer and inner peripheral parts of the plates. The torsion springs installed on the inner peripheral part of said plates is in contact at at least their radial outer peripheral, radial inner peripheral and side portions between said radial outer and inner peripheries with a wall of a concave portion formed on the piston clutch plate, and the torsion springs installed on the outer and inner peripheral parts are held by the drive plate secured to the piston clutch plate.

Abstract: An intermediate plate positioning mechanism for a twin clutch equipped with an annular intermediate plate inside a clutch cover.

Abstract: A release bearing mechanism of a clutch comprises release bearing including an inner race provided with axial extension, a lever plate fitted to the extension and fixed to a diaphragm spring, the lever plate provided with a ring escape groove, a tapered guide portion and a ring fitting portion, the extension being provided with a ring escape groove and a second ring fitting portion, an elastic connecting ring interposed between the lever plate and the extension, a ring pushing means for pushing the connecting ring from ring fitting portion to the other ring escape groove. The ring escape grooves have depth which permits axially relative movement between the lever plate and the extension when the connecting ring is accommodated therein. The fitting portions are adapted to fit to the connecting ring at radially opposite directions and axially opposite directions.

Abstract: A pull type clutch having a clutch disc (16) and a pressure plate (18) in a clutch cover (20) mounted on a flywheel (10), an approximately annular diaphragm spring (22) so installed as to connect its outer peripheral part to said clutch cover (20) and to connect its inner peripheral part to a release bearing (24) which is slidden in an axial direction by a lever-like release fork (26) supported by a pivot (36) fixed to a transmission housing (34), and a fulcrum hole (42) of said release fork (26) for penetrating said pivot (36), characterized by said fulcrum hole (42) extends toward a center (0) of said release bearing (24) so that said release fork (26) can be moved outwardly in a radial direction of a clutch in order to remove a transmission (12).

Abstract: A double wrap brake band having three bands, friction facings fastened to each band and a connecting member connecting the outside bands of the three bands with the intermediate band of such bands. A first bracket member secured to both outside bands, and a second bracket member secured to the intermediate band. The three bands, the connecting member, and the first and second bracket members are made of sheet metal, respectively. Edges, receiving a piston, or an anchor, at their backsides, are integrally formed on the first and second bracket members, respectively. The connecting member and the first and second bracket members are secured to the three bands by rivets.

Abstract: A flywheel assembly comprising a torque limiting mechanism (14) having an annular holder (40) and drum (45). The holder (40) and drum (45) have, respectively, a flange (51) and a friction portion (54). The flange (51) and a friction portion (54) have formed therebetween a space in which are disposed first and second friction plates (41,44). A driven plate (43) is disposed between the first and second friction plates (41,44). An annular first friction material (46a) is disposed between the flange (51) and the first friction plate (41). An annular second friction material (46b) is disposed between the driven plate (43) and the second friction plate (44). An annular third friction material (46c) is disposed between the second friction plate (44) and the friction portion (54). An annular fourth friction material (46d) is disposed between the friction portion (54) and an end surface (55) of second flywheel (12). A Belleville spring (42) is disposed between the first friction plate (41) and the driven plate (43).

Abstract: A speed change control device in an automatic transmission for an automobile (16) equipped with a storage means (3) storing a correlation between an accelerator opening and a vehicle speed by which a shifting in each speed stage is commenced, and its shift point being deviated so as to execute a shift-up operation at a constant high vehicle speed when an accelerator opening is smaller than or equal to a specified value. An accelerator opening rate-of-change computing means (14) computes a rate-of-change of an accelerator opening on the basis of a detection signal from an accelerator opening detector (12) detecting the accelerator opening. Further, a shift-up prohibiting means (15) prohibits a shift-up operation when the accelerator opening rate-of-change computed by the accelerator opening rate-of-change computing means (14) is more than or equal to a specified value.

Abstract: This invention relates to a dustproof mechanism for pull-type clutch having a diaphragm spring. An annular dustproof cover for covering a space is installed at a radial inside opened end of the space existing between a clutch cover end wall and the diaphragm spring, thus preventing dust etc. from entering the space between the diaphragm spring and the clutch cover end wall.

Abstract: A lock-up damper for a torque converter disposed between a front cover and a torque converter and having a piston with a friction member thereon, a first retaining plate secured to the piston and a side plate and second retaining plate secured to each other and to the piston by a common securing means. The first retaining plate holding outer torsion springs and the side plate and second retaining plate holding inner torsion springs and a driven plate between the piston and the torque converter and secured at its inner peripheral end to a hub of a turbine, the driven plate having a plurality of projections of progressively engaging the inner and outer torsion springs.

Abstract: A cylindrical cylinder chamber formed by a casing and having inlet and outlet ports for pressure liquid at its both axial ends is installed in a liquid passage communicating a liquid chamber of the master cylinder device with a liquid chamber of the slave cylinder device. A cylindrical friction member divided circumferentially into plural pieces contacting with a peripheral wall of the cylinder chamber, a moving body carrying the friction member, plural first urging members fitted to the moving body for pressing the friction member onto the peripheral wall of the cylinder chamber, and a second urging member for urging the moving body in its axial direction in order to locate the moving body at a prescribed axial position of the cylinder chamber, are installed in the cylinder chamber. An orifice is formed on the moving body or the friction member in the axial direction.

Abstract: A manufacturing method for a disk-like diaphragm spring for making a center hole at a center part, making rectangular holes on an outer peripheral part with specified spaces left between such holes in a circumferential direction, forming plural ligulated fingers radially by means of plural radial slits extending from such rectangular holes to the center hole and inner peripheral parts of the fingers to be pressed by a release bearing. The method comprises a step of punching such rectangular holes and slits out of a disc-like blank with a press and forming between the slits tapered ligulated fingers and a process of punching out a center hole by using a gear-shaped press die having circular tip portions at the same spacing as the slits for forming tapered openings at the slits extending radially outward from the center hole slits and circular ends on the fingers.