Abstract: A vibration damper has a cylinder filled with damping medium. In the cylinder, a piston rod with a piston is realized so that the piston can move axially. The piston divides the cylinder into two working chambers. The vibration damper also has a damping valve. The damping force of the damping valve can be changed by a magnetic force generated by a magnetic coil inside a magnetic return body on an armature against a spring force of at least one spring. At least two regulating or adjustment parameters are provided to set at least two characteristics which differ from one another in terms of different flows to the magnetic coil. The characteristics can be set by a change of the effective spring characteristic with reference to a damping valve stroke position of the damping valve and also by the ability to regulate the magnetic conductivity of the magnetic return body by an actuator. The actuator can have a magnetic constriction, to which constriction a magnetic conductor body can be connected in parallel.

Abstract: A throttle device for the directionally-dependent influencing of the flow velocity of the fluid in hydraulic actuator systems, in particular of friction clutches in motor vehicles, with a throttle located between a master cylinder and a slave cylinder in the hydraulic system. The throttle is formed by a base body with at least one through hole, which through hole can be at least partly closed by a rubber-elastomer disc. The rubber-elastomeric disc is located on the side of the base body facing the slave cylinder, which disc radially overlaps a through hole, which through hole can be at least partly closed.

Abstract: A bicycle multi-gear hub with a coaster brake includes a hub body, a driver, a planetary gear arrangement and a coaster brake mechanism. The braking effect of the coaster brake mechanism is always boosted in all possible gears by the planetary gear arrangement when the driver is back-pedalled in a braking direction. The planetary gear arrangement can be shifted, if necessary, to always apply braking torque through a ring gear of the planetary gear arrangement, so that the planetary gear arrangement can be in the lowest gear of the multi-gear hub during braking. To shift the planetary gear arrangement into the lowest gear for braking when the planet carrier is connected to the driver for overdrive, a clutch member can be deflected by the planet carrier to disengage the driver from the planet carrier and engage the driver with the ring gear. The portion of the clutch member that engages the planet carrier can be configured independently of the portion of the clutch member that engages the ring gear.

Abstract: An actuator for automated operation of a friction clutch includes a drive that is connected with an input part of a gearing and an output part of the gearing that is movable into operative connection via a transmission member with a disengagement bearing of the friction clutch. The transmission element has a pitch region rotatable for driving an engagement element into force-applying contact with a disengagement bearing for displacing the disengaging bearing and thereby disengaging the clutch.

Abstract: A flywheel device has a drive-side centrifugal mass and a second centrifugal mass, which is rotatable relative to the first centrifugal mass and is connected to the first centrifugal mass via a torsional damping device. At least one of the centrifugal masses has a grease chamber containing a viscous medium for accommodating, at least partially, the torsional damping device. A seal is associate with the grease chamber to hold back the viscous medium in the grease chamber. The seal is accommodated on one of the centrifugal masses and engages into the radial extension region of the other centrifugal mass. The seal extends into the grease chamber, and the side of the seal accessible to the viscous medium has an axial offset relative to the side facing the grease chamber of the wall that interacts with the seal of the centrifugal mass having the grease chamber. The axial offset is limited to the gap width, at least at the sealing point.

Abstract: A motor vehicle friction clutch with automatic wear compensation has a wear compensation element, which wear compensation element can rotate around a clutch axis. The friction clutch also includes an adjustment device, which adjustment device includes a worm rotatably mounted on a carrier. The wear compensation element is a worm gear that meshes with the worm to advance the wear compensation element along the clutch axis to compensate for wear. Axial play in the direction of the clutch axis is provided between the worm gear and the worm to detect wear of the friction linings.

Abstract: A clutch disk for a friction clutch, especially for internal combustion engines, with a hub, two friction disks which are arranged concentric to the hub and are connected thereto. A plurality of facing spring elements are connected with the friction disks so as to be rotationally fixed relative thereto, and are provided between the friction disks in the circumferential direction. The facing spring elements are curved in a wavy manner and nested against one another in pairs such that they exert a force on the friction disks in the axial direction. The facing spring elements which are nested against one another are designed so that their ends which are directed in the circumferential direction are located at a distance from one another in the no-load state of the clutch.

Abstract: An index shifter (1) for a bicycle transmission is placed on a handle bar (3). The index shifter has a housing (2) and a notch element (4) with notches (5), which notch element is connected with a rotatable handgrip and with one of the ends of a control cable (7). The housing has an oblong annular space in which a combination notch spring (20) is placed. This spring supports itself on the housing with two feet (24) and acts in concert with the notch element (4) through a projection (23). The combination notch spring (20), composed of a form spring (21) and a leaf spring (22), permits quiet shifting and supplies sufficiently high pre-tension spring power throughout the service life of the combination notch spring (20).

Abstract: The components of a vehicle, in particular of a non-rail vehicle, which is powered by an electric motor traction propulsion system, can be protected against the damaging effects of accelerations which occur during operation by reducing the operating power supplied to a propulsion motor of the vehicle when the accelerations which occur on certain components of the vehicle reach values which pose an immediate danger to these components or reduce their useful life.

Abstract: A casing for accommodating an operating pull for the purpose of attaching the operating pull to a bicycle gear, especially to a multiple-gear hub with a shifting wheel. The shifting wheel is placed, coaxially to the hub axis, at one of the ends of the hub. The shifting wheel is in contact with a control device that can be operated by the bicyclist during operation of the bicycle. The control device can include a remote-handling device that can be used by the bicyclist. The remote-handling device has a cable pull and a cable cover. The cable cover supports itself on the casing extension by an adjusting screw. The casing has a drive casing, for covering the shifting wheel, and a tubular casing extension, for accommodating the cable pull and an operating pull. The drive casing is connected to the casing extension by a joint with a cable guide. A spring storage and a coupling can be accommodated in the casing extension.

Abstract: A motor vehicle friction clutch with automatic wear adjustment comprises a flywheel which rotates about a rotational axis, a clutch housing positioned with contact on the flywheel to turn with the flywheel, a pressure plate that is non-rotationally connected to the clutch housing and can be axially displaced with respect to the flywheel and a clutch disc that is rotationally arranged between the pressure plate and the flywheel with interposition of friction linings around the rotational axis in relation to the flywheel. A membrane spring element is installed to pre-stress the pressure plate in the direction of the flywheel. At least one clearance sensor is provided at the pressure plate and the clearance sensor has a control lever segment which acts with the wear adjustment device and an axial stop segment which acts with the flywheel. Through a friction ratcheting of the control lever segment, the clearance sensor is fixated on the pressure plate by pre-stressing in the axial direction.

Abstract: A flywheel device has a first flywheel mass that is drivable and rotates around a rotational axis and a second flywheel mass that can be deflected relative to the first at least by a limited rotational angle. The second flywheel mass is drive-connected to the first flywheel mass by a torsional damping device. At least one flywheel mass has a grease chamber which at least partially accommodates the torsional damping device and is equipped with at least one seal against the escape of viscous medium. A first sealing part of the seal is connected to one of the flywheel masses and a second sealing part of the seal is connected to the other flywheel mass. The second sealing part is arranged in a radially offset manner relative to the first sealing part and has at least two fixed arms extending from an annual base in the direction of the first sealing part.

Abstract: A clutch disk with a torsional vibration damper, with an idling system and a load system. The clutch disk including a hub disk mounted with play on a hub via a toothing, cover plates arranged at both sides of the hub disk coaxially thereto, and pre-damper having springs. The hub disk being activatable via a friction arrangement. The friction arrangement has a friction ring which is supported at the hub on one side and at the springs of the pre-damper on the other side.

Abstract: A friction clutch, especially for motor vehicles, with a carrier plate, which interacts with a pre-damper and has friction linings and acts on a flywheel, especially a dual-weight flywheel. The flywheel is connected to the crankshaft of an internal combustion engine. The pre-damper has a cover disk and an intermediate disk. The carrier plate has a plurality of apertures, circumferentially distributed evenly on a graduated circle for the purpose of accommodating springs of the pre-damper. The cover disk is directly engaged with the carrier plate.

Abstract: A friction clutch with a flywheel and a clutch housing has the flywheel and clutch housing connected to one another by means of a preferably cylindrical wall located in the radially outer portion of the clutch housing. The cylindrical wall can extend in a ring-shaped manner around the axis of rotation of the flywheel. The clutch housing encloses a clutch plate with friction linings in the radially outer area, and an application plate or pressure plate can be pressed toward the clutch plate by means of an application spring. The friction linings can be guided or extended radially outwardly up to directly next to the cylindrical wall, to make possible, with a specified friction surface, a minimum ratio of outside diameter to inside diameter on the friction linings. The friction linings can be connected to the clutch disc without the interposition of a lining spring system.

Abstract: A switchable ratchet freewheel, under load, for multiple-gear hubs on bicycles includes a bolted pawl, a drive, a switch bush, as well as a switch ring. The switch ring, which has a positive-fit connection to the pawl, can either be lifted by a bulge on the switch bush, which acts in concert with an incline on a switch nose, provided that a small or no turning moment is conveyed, or by recesses with end faces and timing edges, which act in concert with a run-up incline on the recesses, whereby the recess enters into a short positive-fit connection with the segment of the switch nose that faces radially inward, provided that higher turning moments are present. In case the pawl is not lifted immediately, by means of the bulge acting in concert with the incline, this results in the positive fit of the recess with the switch nose, which reliably disengages the pawl bond when the run-up incline acts in concert with the timing edge.

Abstract: Vibration damper, in particular a shock absorbing strut, with an essentially U-shaped decompression stop boundary bracket, which bracket is fastened to a container tube, and in the event of a rebound of a vehicle axle comes into contact with a chassis-side support surface. The bracket includes a base plate with side walls, and the entire decompression stop boundary bracket is formed from a single bent component. The base plate is realized in a seamless manner and has a cutout which is adapted to the diameter of the container tube and acts as a positioning stop for the entire decompression stop boundary bracket.

Abstract: A clutch plate in which the support of the hub provides for pivoting as well as radial compliance relative to the remaining components. This support is accomplished by a component, which is centered directly or indirectly on the hub plate of the load compliance, whereby the load springs can be employed for radial compliance of the hub.

Abstract: A friction clutch for arrangement in the power train of a motor vehicle. The friction clutch includes a flywheel mass arrangement to be fastened to an input shaft rotating about an axis of rotation. A pressure plate unit with a clutch housing is held at the flywheel mass arrangement. A contact-pressure plate is guided so as to be axially displaceable relative to the clutch housing and the flywheel mass arrangement. A clutch spring arrangement axially spring loads the contact-pressure plate toward the flywheel mass arrangement. A clutch disk with friction facings projects between, on the one side, friction surfaces of the flywheel mass arrangement which are located axially opposite one another and, on the other side, the contact-pressure plate. The flywheel mass arrangement and the contact-pressure plate are coupled with one another in a torsionally elastic manner with reference to the axis of rotation in order to limit the peak torque transmitted through the friction clutch.

Abstract: A friction clutch with a mechanism to automatically adjust for the wear of the friction linings by an adjustable-width device. The adjustable-width device includes at least one adjustment element. The adjustment element is centered with respect to the axis of rotation opposite the pressure plate by several guide pins distributed about the circumference of the pressure plate. The guide pins extend axially and support the width of the adjustable element.