Abstract: A shearer loader for underground mining operations including a duplex-input transmission coupled to the haulage box drive motor of the shearer loader. A first input of the duplex-input transmission is coupled to the haulage box office motor, and a second input of the duplex-input transmission is coupled to a drum-cutter drive motor of the shearer loader. During those times in which increased feed rates are required of the shearer loader, feed forces required for the increased feed rate is supplied by both the haulage box drive motor, and the drum-cutter drive motor.

Abstract: A clutch release bearing assembly includes a tubular plastic carrier member for actuating a self-aligning clutch release bearing. The bearing is connected to the carrier with a rigid annular clip. The rigid clip is formed with recesses or tabs which receive or engage complimentary mating portions provided on the carrier. A radial flange is formed on the clip for axially restraining the bearing on the carrier. Bearing seals may be provided on the flange to prevent debris from entering the bearing assembly.

Abstract: For the snap connection of a clutch releaser with spring tongue ends of a diaphragm spring in a pulled-type diaphragm spring clutch, there is secured to the spring tongue ends a first ring part which comprises a radially inwardly protruding first stop ring shoulder directed axially away from the releaser. With the releaser there is connected a second ring part which comprises a radially outwardly protruding second stop ring shoulder directed axially to the releaser and is insertable, with the second stop ring shoulder leading, through beneath the first stop ring shoulder axially into the first ring part. On the side of the first ring shoulder axially remote from the releaser a radially elastic wire ring is arranged which snaps over the second ring shoulder in the insertion of the second ring part. A support ring is axially fixedly inserted into the first ring part and axially supports the wire ring on a ring shoulder in the insertion of the second ring part.

Abstract: An improved clutch release bearing assembly includes a sliding sleeve providing first and second sliding surfaces respectively facing the bore of a bearing and a guide element extending through the bore, both surfaces minimizing binding, wear or excessive friction between the bearing and the guide element during relative reciprocal motion therebetween. The sleeve, preferably fashioned from plastic, finds particular utility in a clutch release bearing surrounding a transmission shaft retainer or quill tube. The length of the sleeve is such that the bearing may slide on an outer sliding surface for a predetermined distance.

Abstract: A first member, such as a clutch release bearing can be releasably connected to a second member, such as a cup spring in a coupling device, in that the member has a cyclindrical portion, which is insertable in a hole in the second member, the hole being surrounded by radially inwardly directed tongues. The portion is provided with radially outwardly directed projections forming a rim and being of a number and a circumferential extension corresponding to the interspaces between the tongues and which can be displayed through these interspaces. Catch fingers are arranged to be inserted between the tongues and the projections respectively after assembly for preventing unintentional disconnection of the connection. The fingers may be removed from the lock position at dismounting.

Abstract: This is a "pull" type clutch release bearing. There are provided, on the one hand, abutment means adapted for circumferential bearing engagement, in a first direction, of the clutch release bearing on a member external thereto, on rotation of the clutch release bearing about its axis, and, on the other hand, a bracing member adapted to oppose any retrograde rotation of the clutch release bearing after such circumferential bearing engagement.

Abstract: A clutch assembly for independently controlling transmission of drive to a pair of concentric output shafts, comprises a first driven plate mounted on the inner shaft and arranged to be clamped between a first pressure plate and a driven fly wheel; and a second driven plate mounted on the outer shaft and arranged to be clamped between a second pressure plate and a reaction plate. Spring elements, are arranged to act against a pair of coaxial cover members, to urge the pressure plate into clamping engagement with driven plate and pressure plate into clamping engagement with driven plate; and release bearings are provided to selectively remove the clamping load applied to the driven plates. The cover members and reaction plate are drivingly interconnected and adapted to be connected in axially fixed realtionship to the fly wheel, and pressure plates are drivingly connected to the cover members and reaction plate while being moveable axially thereof.

Abstract: A clutch release bearing assembly comprises a clutch release bearing adapted to be coupled to a clutch release device of a clutch by a coupling part attached to the clutch release device. This coupling part comprises a radial bearing flange adapted to bear axially on the clutch release device and an axial bush passing axially through the clutch release device. The assembly further comprises a drive part on the clutch release bearing and a fastening device operative in traction between the coupling part and the drive part. This fastening device fastens the coupling part and the drive part together in the axial direction from the clutch release device to the clutch release bearing. It comprises an annular coupling member carried by either the coupling part or the drive part. This is elastically deformable in the radial direction. There is a transverse drive bearing surface on the other part and the annular coupling member bears axially on this drive bearing surface.

Abstract: In a friction clutch between an engine and a gearbox, a clutch release bearing is premounted in a clutch portion connected to the engine and an axially displaceable sleeve piston cooperating with the clutch release bearing is premounted in a release mechanism connected to the gearbox. The sleeve piston comprises a companion flange assembly which cooperates with a blocking element to assume a position for either displacing or not displacing the clutch release bearing. Such an arrangement is used in a so-called pull type clutch, which requires connection between the clutch release bearing and the release mechanism when the engine is connected to the gearbox. The present invention permits simple and secure assembly and disassembly of the engine to the gearbox and the clutch release bearing to the release mechanism.

Abstract: A bearing assembly having particular usefulness as a throw-out or release bearing for a motor vehicle mechanical clutch. The bearing assembly has a cylindrical housing provided with an annular end wall engaged with, or mounted on, the flange of a bearing carrier. The non-revolving race of the bearing is engaged against the housing end wall such as to permit lateral displacement of the race relative to the housing end wall. The revolving race of the bearing supports an annular adapter having an outwardly extending flange engaged with the release fingers of the clutch mechanism. The housing is closed by an annular end cap having a flange radially extending between the end face of the revolving race and the adapter flange and provided with a seal having its lip engaged with the revolving race end face or with the back surface of the adapter flange. A second annular seal is preferably provided between the end of the adapter opposite to the flange and the surface of the housing end wall.

Abstract: A clutch release bearing suitable for automobile vehicles comprises an operating element designed to be acted on directly or indirectly by a control member. In practice this is a clutch release yoke. It also comprises a drive member designed to operate on the clutch release device of a clutch. This bears axially on the operating element either directly or indirectly. Coupling means couple the drive element to the operating element in the axial direction. The coupling means are in one piece with a substantially plane plate and have a generally U-shaped configuration, with two parallel arms joined by an arch-shaped curve middle part. They consist of two clips disposed at diametrically opposite positions relative to each other. Each is formed from a respective arm of the aforementioned plate, the whole forming a single member.

Abstract: A clutch release bearing and bearing carrier assembly comprising a bearing support flange at one end of a carrier member, the bearing support flange having elastically outwardly spreadable fingers or lugs with a retaining ledge or shoulder at their end for holding a clutch throw-out bearing against the flange by snap fit. The carrier member has a peripheral groove, preferably in the form of a pair of parallel flanges disposed at the other end of the carrier member, the opposite ends of the pins of a clutch control fork being engageable in the groove for abutment against a longitudinal wall in the groove and for snap fit between that longitudinal wall and at least one deflectable projection on an inner wall of the groove.

Abstract: A self-aligning clutch release bearing and carrier sleeve assembly includes a carrier sleeve which defines a first axis and a bearing having a generally annular thrust face adapted to be brought in engagement with rotating clutch fingers or the like of a clutch mechanism, which clutch fingers are rotating about a second axis which may or may not be coincidental with said first axis. The bearing and carrier sleeve assembly is adapted to adjust the rotational orientation of the bearing to coincide with the second axis of rotation, and comprises a bearing including a radially inwardly extending shoulder portion which terminates at a position radially spaced apart from the carrier sleeve.

Abstract: A clutch release bearing assembly comprises a coupling part which is adapted to couple a clutch release bearing to a clutch release device of a clutch. The coupling part is attached to the clutch release device. Part of the clutch release bearing forms a drive part. There is an annular retaining groove on one of the coupling and drive parts. A fastening device operative in traction between the coupling part and the drive part is adapted to couple these parts together in the axial direction from the clutch release device to the clutch release bearing. The fastening device comprises an annular coupling member which is elastically deformable in the radial direction and at least partially engaged in the annular retaining groove. It further comprises a substantially transverse drive bearing surface on the other of the aforementioned coupling and drive parts on which this coupling member bears axially in the axial direction in question. There is a groove in the same part as this drive bearing surface.

Abstract: A clutch release bearing assembly comprises a coupling part adapted to couple a clutch release bearing to a clutch release device of a clutch. A substantially axial bush is attached to the clutch release device. There is an engagement bearing surface at the end of this bush. A drive part which is part of the clutch release bearing comprises an annular groove. A decoupling part is slidably mounted on the drive part. A fastening device operative in traction is disposed between the coupling part and the drive part. It couples these parts in the axial direction from the clutch release device to the clutch release bearing. It comprises an annular fastening ring which is disposed around the axis of the assembly. This ring is elastically deformable in the radial direction and at least partially interlocked on the clutch release bearing side with a bearing surface on the coupling part.

Abstract: A clutch release bearing assembly comprises a coupling part adapted to couple a clutch release bearing to a clutch release device of a clutch. The coupling part is attached to the clutch release device. A drive part forms part of the clutch release bearing and there is an annular retaining groove on the coupling part or the drive part. A fastening device operative in traction between the coupling part and the drive part couples these parts together in the axial direction from the clutch release device to the clutch release bearing. The fastening device comprises an annular coupling member which is elastically deformable in the radial direction and at least partly engaged in the annular retaining groove. It further comprises a substantially transverse drive bearing surface on the other (coupling or drive) part, on which the coupling member bears axially in the axial direction in question. There is a groove in the same part as the drive bearing surface.

Abstract: A self-aligning clutch release bearing and carrier sleeve assembly includes a carrier sleeve which defines a first axis and a bearing adapted to be brought into engagement with rotating clutch fingers or the like of a clutch mechanism, which clutch fingers rotate about a second axis which may not be exactly coincidental with the first axis. The bearing and carrier sleeve assembly is adapted to adjust the rotation orientation of the bearing to coincide with the second axis of rotation of the clutch fingers. This bearing and carrier sleeve assembly comprises: a bearing including a generally annular thrust face for engagement with the clutch fingers and first and second annular raceways having a plurality of bearing elements disposed therebetween, one of the raceways rotating in unison with the thrust face and the other of the raceways being coupled with the carrier sleeve. A mounting arrangement is provided for grippingly engaging the second raceway for mounting the same to the carrier sleeve.

Abstract: A traction-type clutch bearing device includes an engaging piece (1) maintained in permanent contact with the clutch diaphragm (13) by an elastic member (14), a thrust bearing (2) which can move axially relative to a guide tube (10) under the action of a control member (11), and an axial connecting device interacting with a retaining groove made either in the engaging piece or in a member of the thrust bearing to connect and/or disconnect the thrust bearing and the engaging piece. The connecting device includes a ball cage (3) and a plurality of balls (23) mounted between the engaging piece (1) and the thrust bearing (2) and which are capable, in the connection position, of interacting with a wedging zone (25) and the a retaining groove (24), to ensure axial locking, and, during removal, with a release zone (30). The wedging zone (25) and the release zone (30) are located either on an inner raceway (6) of the thrust bearing (2) or on the engaging piece (1).

Abstract: An adjustable clutch brake apparatus is provided in a friction clutch release bearing assembly. An annular adjusting ring accommodates a clutch brake ring via an externally threaded surface which engages an internally threaded surface on the clutch brake ring. The adjusting ring is secured by means of its internal circumference to the outer race of therelease bearing assembly, and is thereby free to rotate about the inner race fixed to a release bearing sleeve. In a preferred form, the adjusting ring and the clutch brake ring are selectively locked together to prevent relative rotation during clutch operation. For this purpose, a lockstrap having an elongated aperature is adapted to accommodate a bolt member engageable with a threaded bore formed in a groove formed in the clutch brake ring. The bolt member passes through the slot and rigidly holds the lockstrap in the groove.

Abstract: A device for disengaging the friction clutch of a motor vehicle wherein a sleeve is movable along a tubular guide under the action of two arms of an actuating fork and wherein the sleeve has two platforms disposed diametrically opposite each other and serving to receive motion from the respective arms so that a bearing on the sleeve can engage the prongs of the diaphragm spring in the clutch. The sleeve is formed with an internal surface an annular section of which flares toward one axial end of the sleeve so as to allow the sleeve to rock in a plane including the axis of the sleeve and halving the platforms.

Abstract: A carrier for a motor vehicle clutch throw-out bearing, the bearing having a revolving race and a non-revolving race. The carrier is generally in the form of a sleeve slidably disposed on the periphery of a tubular member surrounding the driveshaft from the clutch to the motor vehicle transmission. The sleeve has a flange terminating in a rim in which the bearing is located, and the flange has resiliently deformable abutment members snapping back to their original position after the bearing has been placed within the rim, and having abutment surfaces engaged with the non-revolving race of the bearing such as to hold the bearing within the rim between the abutment surfaces and the flange.

Abstract: The assembly includes a first sleeve connected to a releasing mechanism of a clutch and having a screw threaded surface. A second sleeve is movable relative to the first sleeve and is operatively connectable to a release member. A collar is in threaded engagement with the first sleeve and clutch release forces are transmitted through the collar from the second sleeve to the first sleeve. The collar is prevented from rotating relative to the first sleeve during clutch release. An abutment is provided on the clutch for releasing the collar when the second sleeve reaches a predetermined position to allow the collar to rotate and allow the first sleeve to move axially relative to the second sleeve. A spring for urging the second sleeve towards the clutch acts between the second sleeve and part of the abutment on the clutch. A locking ring may be provided for locking the collar to the second sleeve during clutch release.

Abstract: A friction clutch for a vehicle includes a clutch release mechanism comprising a first member, a second member, a detent arranged to locate the first member relative to the second member on assembly by moving the first member in one direction relative to the second member whereby a clutch release force subsequently applied to said first member in an opposite direction will be transmitted to said second member to release the clutch, and a detent release sleeve which enables the detent to be released by urging said first member further in said one direction relative to said second member so that the first and second members can thereafter be separated. The detent is carried by one of the members and the detent release sleeve is carried by the other of the members whereby on separation of the members following release of the detent the detent and detent release sleeve disengage and remain on their respective members.

Abstract: A clutch release bearing comprises a drive element through which it is adapted to apply traction to the clutch release device of a clutch and an operating element through which it is adapted to be operated on by a control member. It further comprises a cover with a radial lip for coupling the operating element axially to the driving element. A coupling part attached to the clutch release device has retaining fingers and is fastened to the drive element. Structure is provided for limiting insertion of the drive element into the coupling part fastened to the operating element, consisting of angularly separated axial bearing lands alternating with openings and adapted to serve as abutments facing the coupling part.

Abstract: The clutch comprises a clutch plate which can be retracted by a release mechanism to release a driven plate. The release mechanism includes first and second members and an intermediate detent. The detent is located between the members by urging the first member in one direction relative to the second member. To separate the first and second members, the first member is initially urged further in said one direction to release the detent.

Abstract: A bearing carrier for a pull-type clutch, and which forms part of the clutch mechanism assembly, has a crenellated rim provided with longitudinally projecting tooth-like portions, cut-out portions being provided between consecutive projecting portions. A separate tubular member, forming part of the clutch control mechanism, has a correspondingly crenellated rim provided with longitudinally projecting portions and cut-out portions between consecutive projecting portions. One of the crenellated rims has a peripheral groove in which is disposed an expandable resilient ring, and the other crenellated rim has a corresponding peripheral groove and is provided at the leading edge of its projecting portion with a ramp for expanding the ring when the one of the crenellated rims is pushed into the other crenellated rim for coupling the bearing carrier with the tubular member during assembly of the bearing carrier with the tubular member.

Abstract: The invention concerns a sliding sleeve for being disposed around the outer ring of an anti-friction bearing and for being secured to a base member. The sliding sleeve might be used in the clutch of an automotive vehicle. The sliding sleeve has one arm extending axially past the outer ring of the bearing and a radially inwardly directed arm. The inner ring of the bearing has a radially outwardly directed flange. The radially inwardly directed arm and the radially outwardly directed flange extend partially past each other and are sealed to each other. There is a sliding connection between the radially inwardly directed arm of the sliding sleeve and the radially outwardly directed flange of the inner ring. The radially inwardly directed arm contacts the axially outward end of the outer ring.

Abstract: A friction clutch for a vehicle utilizes a snap connection and self indexing to insure accurate presentation during installation. The release mechanism of the clutch includes a first member for applying release forces to a second member which releases the clutch.

Abstract: A friction clutch for a vehicle utilizes a snap connection and self indexing to insure accurate presentation during installation. The release mechanism of the clutch includes a first member for applying release forces to a second member which releases the clutch. A guide member is provided to constrain a projection on one of the members to follow a first path into a recess when assembling the first and second members and to follow a second path out of the recess when separating the first and second members.

Abstract: The inner race of a clutch release bearing is axially extended to act as an engagement element in a pull-type clutch release mechanism. The engagement element is coupled to the diaphragm of the clutch by means of a sub unit preassembled on the diaphragm and consisting of a piece for acting on the diaphragm and an elastic retention means. The engagement element is coupled to the sub unit by means of a fixing ring which is held in place by the elastic retention means.

Abstract: In a clutch cover assembly there is associated with the clutch release device a coupling member adapted to permit a clutch release bearing to be coupled to the clutch release device by means of a coupling ring. Means are further provided for axially coupling the coupling member to the clutch release device. These coupling means are integral with the coupling ring and are formed by appropriately shaped parts of the latter.

Abstract: A system for controlling a clutch for a plurality of independent engine units, in which gears of the engine units are engaged with a gear of an output shaft and are arranged to form a pump chamber, the output fluid of the pump chamber being used for operating the clutch so as to connect engine units with each other.

Abstract: Improvement in a hydraulic control apparatus for assembly on structure to actuate a remotely located mechanism, the apparatus including an actuator having an annular body providing an annular piston chamber therein and an annular piston slidably reciprocable on the body, the actuator being pre-filled with hydraulic fluid and pre-tested prior to being installed on the structure, an annular elastomeric seal axially reciprocable within the piston chamber which liquid-tight seals the hydraulic fluid behind it, the improvement comprising constructing the actuator so that it can be separated into two subassemblies, one being a body subassembly which includes the body and the other being a piston subassembly which includes the piston, the construction of the body being such that its piston chamber is formed at the rear end thereof and the construction of the piston being such that the rear end thereof reaches into the piston chamber and abuts against the seal during functioning of the actuator, the improvement furth

Abstract: According to this assembly, the means of fixing in terms of traction, which are used between the engagement piece (25) of the clutch release bearing (10) and the gripping piece (13) attached to the disengaging device (11) to be controlled, comprise, on the one hand, a fixing ring (32) engaged in a retaining groove (33) provided in the engagement piece (25) and, on the other hand, a driving bearing surface (34) provided on the gripping piece (13).According to the invention, that flank of the retaining groove (33) which is axially located on the side opposite the driving bearing surface (34) in relation to the fixing ring (32) is oblique relative to the axis of the unit as a whole.The invention is used, in particular, for clutch release bearings of motor vehicles.

Abstract: A friction clutch system includes a constant running release bearing member designed to accommodate axial misalignment. In a preferred form, a wave washer is interposed between a flange of a bearing carrier and the outer race of the release bearing member to provide for axial flexibility. In addition, a mechanical stop is provided to limit axial travel of a thrust ring affixed to the axially moveable bearing member in a direction of clutch disengagement. In a preferred form the stop is formed of an elongated shaft having a radially extending projection for arresting the carrier movement beyond a predetermined limit. A sleeve positioned over the shaft includes markings to permit visual indication of amount of clutch wear to aid in the servicing of the clutch system. Also in a preferred form, the carrier is formed of two resilient non-metallic parts and incorporates a snap fit flange-detent connection system which preloads the wave washer upon assembly of the two carrier parts.

Abstract: A release mechanism for use with a clutch release bearing of a pull type clutch comprises an element on which there is a transverse circular groove, and locking members comprising a flexible ring coaxial with a diaphragm and bearing on the circumference of a central aperture therein, and a washer with flexible lugs applied against the face of the diaphragm and coaxial with this latter so that the flexible lugs engage around the ring to render it rigid with the diaphragm. The ring is adapted to snap into the groove in the actuating element at the moment of engagement.

Abstract: A self-centering releaser for a pressed-type motor vehicle friction clutch comprises a sliding sleeve (1) of synthetic plastics material with an integrally formed-on annular flange (3) protruding outwards radially of the sleeve axis and having a flat abutment face (31) on at least one axial side. The releaser further comprises a deep-groove ball bearing (5) radially movably enclosing the sliding sleeve (1) on the side of the abutment face (31), which bearing is fixed on the annular flange (3) by a retaining fitting (7) which radially externally grasps over the ball bearing (5). A spring (29) acting between the retaining fitting (7) and a non-rotating outer race ring (9) of the ball bearing (5) presses the outer race ring (9) through an annular disc (35) against the abutment face (31).

Abstract: A clutch comprises a casing to which is attached an intermediate member on which is mounted a rotary motor. The outside surface of an axial cartridge on the intermediate member supports and guides an axially mobile actuator. Inside a housing in the cartridge is a screw-and-nut transmission of which either the screw or the nut rotates with the motor while the other is coupled axially to the actuator.

Abstract: In a clutch release bearing there is provided a groove for the coupling ring ensuring its coupling to the coupling member provided to this end on the side of the clutch release device to be operated opposite that facing the clutch release bearing. The flank of this groove disposed on the side of the clutch release bearing forms part of a decoupling member mounted to slide axially.

Abstract: A propulsion system for a vehicle provides for a drive shaft to be powered by an electric motor or an internal combustion engine, the motor being permanently coupled to the drive shaft and the engine engageable with the shaft by a clutch. Engine speed is matched with that of the drive shaft before engagement of the clutch by electrically loading the engine, preferably by coupling a generator to the engine and varying the generator field current. The clutch is automatically engaged when the speeds are equal.

Abstract: The mechanism includes a release member including a driving element in which is formed a circular groove. A washer which in use is coaxial with a diaphragm of the clutch is provided with clips which pass through a release ring. A flexible retaining ring is gripped resiliently between the release ring and the washer for location in the groove during coupling of the driving element to the clutch. The load derived from the resilient engagement of the retaining ring against the washer and release ring is insufficient to overcome a resilient grip between the clips and the release ring.

Abstract: The clutch comprises a clutch plate 10 which can be retracted by a release mechanism 20 to release a driven plate 12. The release mechanism comprises first and second members 24, 26 and an intermediate detent 25. The detent is rotatably mounted on member 24. The detent is located between the members in an operative position by urging the first member in one direction relative to the second member. To separate the members, the first member is urged further in the one direction to enable a detent release ring 37 to rotate the detent 25 into a release position.

Abstract: A single lever control head assembly (10) for dual-position-shifting of a transmission and dual position throttle control of a motor includes a support housing (12) and a single lever (62) pivotally supported in a bore (142) in a cylindrical housing (12) for rotation about a lever axis (A). The bore (142) and its axis (A) are offset from the center axis of the cylindrical housing. A throttle arm (16) is rotatably supported by the housing (12) for pivotal movement about a throttle arm axis (B). The transmission arm (20) has a cylindrical female portion (22) rotatably supported by the housing (12) for pivotal movement about a transmission arm axis (A). The transmission arm axis and the lever axis are coaxial.

Abstract: A drive mechanism for a machine such as a machine tool or robot includes a rotatable shaft, e.g. a lead screw or spindle, drivingly connected with a movable element, e.g. a worktable or tool support, in the machine, a drive shaft for rotation by a motor and a coupling unit, e.g. clutch or gear transmission, for drivingly connecting the drive shaft with the rotatable shaft to move the movable element in a predetermined form of movement under a variable load in the machine. Encoders are provided in a rotation-sensing relationship with the drive shaft and the rotatable shaft, respectively, to feed two trains of rotation-responsive pulses into a differential counter which provides a difference in angle of rotation signal representing an instantaneous torque produced at the drive coupling unit between the drive and rotatable shafts.

Abstract: A maintained self-centering clutch release bearing comprises an operating sleeve moved axially by clutch release control means. There is radial clearance between the sleeve and a bearing comprising a non-turning race, a turning race and rolling members between the races. A clutch cover assembly operating boss is fastened to the turning race. There are respective and adjacently disposed rims on the non-turning race and the operating sleeve, both perpendicular to the axial direction. An elastic clamping ring bears against bearing means on the operating sleeve and acts axially on the rim of the non-turning race to urge its rim axially towards the rim of the operating sleeve, so that the rims are clamped axially together, with friction. This assembles together the bearing and the operating sleeve and provides for maintained self-cerntering of the clutch release bearing relative to the clutch cover assembly.

Abstract: A clutch disengaging apparatus wherein an annular cylinder defines an annular cylinder chamber receiving a reciprocable annular piston with an annular outer clearance surrounding the outer skirt of the piston and an annular inner clearance surrounding the inner skirt of the piston. A membrane overlies the bottom wall of the piston and its marginal portions are clamped between the sections of the cylinder so that the membrane forms an outer corrugation in the outer clearance and an inner corrugation in the inner clearance. A throw-out bearing is radially movably mounted in the piston and is biased against the prongs of the diaphragm spring in a clutch by a coil spring which is surrounded by an inner wall of the cylinder, which surrounds an outer wall of the cylinder, or which is installed in the cylinder chamber between the bottom walls of the piston and the cylinder.

Abstract: The hydraulically operable clutch release for a motor vehicle friction clutch comprises a housing part (3) of substantially ring form and an annular piston (9) guided displaceably in sealed manner in the direction of the ring axis on the housing part (3). The annular piston (9) together with the housing part (3) forms an annular hydraulic pressure chamber (15) and comprises a stop face (29) facing axially away from the pressure chamber (15). A release bearing (19) guided both axially and radially movably on the annular piston (9) has a non-rotating race ring (23) supportable radially movably on the stop face (29) of the annular piston and a rotating race ring (21) constantly abutting in radially movable manner on a release device (37) of the friction clutch. Between the housing part (3) and the annular piston (9) there is compressed an axially acting compression spring (31) for the permanent supporting of the rotating race ring (21) on the release device (37).

Abstract: The clutch comprises a clutch plate which can be retracted by a release mechanism to release a driven plate. The release mechanism includes first and second members and an intermediate detent. The detent is located between the members by urging the first member in one direction relative to the second member. To separate the first and second members, the first member is initially urged further in said one direction to release the detent.

Abstract: A vehicle drive arrangement in which a drive shaft (10a) is coupled with a first hollow driven shaft (12) and a second driven shaft (11) within hollow driven shaft (12) by first (14) and second (13) coaxial clutches respectively clutch (13) which is adjacent flywheel (10) is operated by a force transmitting path in the form of pins (17) located outside both driven shafts and passing axially through the central portion (24) of clutch (14). This produces a more compact arrangement since the force transmitting path for the operation of clutch (13) does not pass around the outer periphery of clutch (14).

Abstract: A self-centering clutch release bearing for sustained alignment is disclosed comprising an operating member having a transverse flange, an annular bearing plate bearing axially against the flange and cooperating with a throw-out fork, a drive member (e.g. a ball bearing) coacting with clutch release members (e.g. diaphragm spring fingers) mounted for limited radial movement relative to the operating member. Resilient portions alternate with bearing portions on the bearing plate and axial tabs extend from the resilient portions for coupling the drive member to the operating member, the resilient portions biasing the drive member toward a flange on the operating member.