Abstract: Provided is an infinitely variable cone pulley transmission for which the contact pressure between the cone pulley pairs and the traction is generated hydraulically on one transmission side and mechanical, with the aid of a spring, on the other transmission side. The second transmission side is provided with an axially fixed and an axially movable cone pulley with extended hub. The contact pressure mechanism includes a cam sleeve that is fixed relative to the shaft, a cam sleeve formed by the free end of the hub and roll bodies for the force transmittal, which are inserted between opposite arranged cam curves and rotate around axes extending radial to the transmission shaft. The roll bodies are guided by rings and are held at a mutual distance to each other and with spring force in the axial center region between the cam sleeves, wherein the spring is arranged coaxial on the extended hub.

Abstract: A pulley gear for an infinitely-variable pulley drive has one pulley disposed on a drive shaft and another pulley disposed on an output shaft, and a transmission element circulating between the pulleys. An output side pressing force is applied to the output side pulley by a pressure medium and a drive side pressing force is applied to the drive side pulley by the pressure medium. The pulley gear has a valve that generates a torque-dependent pressure through the torque-dependent relative movement of a first ring, a jacket, and a second ring, thereby providing a load-dependent pressing force. A cylinder and the second ring form a first cylinder-piston aggregate, and the jacket and first and second rings form a second cylinder-piston aggregate. The first ring has a first cam track thereon and the second ring has a second cam track.

Abstract: A gear arrangement, especially for a double screw extruder, has a drive shaft and at least one driven element, wherein the driven element is in active connection, at least indirectly, with two intermediate gears driven by the drive shaft and can be driven by them. The intermediate gears (6, 7) are arranged on axles parallel to each other and act on the same driven element (8), wherein the intermediate gears are in mesh with a common distributor gear (5) coupled at least indirectly to the drive shaft (9) and can be driven by this distributor gear. The distributor gear is mounted in bearings so that it can move at least indirectly in the radial direction.

Abstract: The gear for twin-screw extruders having a first output shaft which is driven by a drive shaft and a second output shaft which is driven by the first output shaft via two side shafts which are arranged on both sides. The shafts are arranged parallel and inside a joint gearbox case which is divided along a vertical junction plane into two gearbox case halves. The junction plane extends between the axes of the two output shafts.

Abstract: To permit the advantage of low-noise operation, obtainable by using links of respectively different lengths in a sprocket chain built in the triple side bar arrangement, while providing longitudinal guidance to the links and preventing interference of longer links with shorter links, some of the chain links (1, 10) have the side bars (1a, 10a) formed with a projecting nose (12, 14), positioned on at least one end portion of the respective side bar of the link, the projection extending towards the next sequential chain link, with a maximum extent up to the joint piece or rocker element (3) interconnecting the links together.

Abstract: A side-bar chain for an infinitely variable cone-pulley transmission which chain includes chain links composed of individual side-bars and joint pieces connecting the links together, with each joint piece being composed of a pair of rocker pieces pushed into apertures of the side-bars, the rocker pieces having end faces extending laterally of the length of the chain for transmitting friction forces between associated friction pulley sheaves and the side-bar chain, and each rocker piece being connected with its associated side-bars by being interlocked therewith to be secured against movement in the direction of pivoting between adjacent links. Each said side-bar presents two end webs spaced apart in the running direction of the chain, extending transverse to the running direction and to the length of the rocker pieces, and each bounding a side-bar aperture.

Abstract: A side-bar chain for an infinitely variable cone pulley transmission which chain includes links composed of individual side bars and rocker pieces inserted through apertures in the side bars and connecting the links together. The rocker pieces have end faces extending laterally of the length of the chain for transmitting friction forces between associated friction pulley sheaves and the side-bar chain. Each of the side bars presents two end webs spaced apart in the running direction of the chain, extending transverse to the running direction and to the length of the rocker pieces, and each bounding a side-bar aperture. At least one of the end webs has a convex rocker surface projecting into the side-bar aperture.

Abstract: An infinitely variable cone pulley transmission has a first and a second pulley mounted on driving and driven shafts and connected by an endless belt. Each pulley is formed of first and second pulley discs. A hydraulic device sets and maintains each first pulley by hydraulic pressure in an axial position corresponding to a desired transmission ratio between the driving and the driven shafts. A torque sensor is mounted adjacent a second pulley disc for receiving a torque. The torque sensor has a pressing device mounted for axial displacement as a function of the torque and a valve arranged for displacement by the pressing device for varying the hydraulic pressure on the first pulley discs. The pressing device has a first ring torque-transmittingly and axially immovably mounted in the vicinity of the second pulley disc, a second ring relatively rotatably and axially slidably mounted between the second pulley disc and the first ring and forming a movable part of the valve.

Abstract: In an infinitely variable cone pulley transmission having a driving shaft connected to a source of driving power, a driven shaft, a pair of conical discs nonrotatably mounted on each shaft with at least one disc of each pair being axially displaceable on its associated shaft, an endless transmission element adapted to run between the two pairs of discs for transmitting power between the shafts, a cylinder-piston unit associated with one axially displaceable disc on each pair for urging that disc toward the other disc of the same pair with a force proportional to the pressure of fluid in the unit, a distributing valve arranged to be arbitrarily adjusted to vary the speed ratio of the transmission, and connected to a pressure fluid source and to each unit for supplying pressure fluid thereto, and a normally-closed control valve connected in fluid flow communication with the distributing valve for controlling the fluid pressure in the unit associated with the driven shaft, the closing force presented by the cont

Abstract: An infinitely variable cone-pulley, belt-type transmission having at least two cone-pulley pairs each mounted on a respective shaft, with one axially displaceable cone-pulley of each pair being formed as a rotating pressure cylinder of a piston firmly connected with the associated shaft, and the pressure application forces are generated hydraulically in the cylinder in dependence upon load and transmission ratio. Such transmissions are further provided with a transmission ratio setting member and a control slide valve coupled therewith which distributes the pressure fluid to the pressure cylinders, at least one adjustable pressure control valve controlling the application pressure, in dependence on load and transmission ratio, in the return conduit of the control slide valve for the hydraulic pressure necessary on the drive-output side of the transmission. The pressure control valve is mounted to rotate with one shaft and includes a valve body which is actuatable by a movable intermediate member, e.g.

Abstract: In a side-bar chain for an infinitely variable cone pulley transmission, which chain is composed of packs of side bars forming successive links which are articulatedly connected with one another, and thrust pieces acting transversely of the longitudinal direction of the chain for friction force transmission between cone pulleys and the side-bar chain, the lengths of selected ones of the links, between associated articulations, are made different from those of the remainder of the links of the chain.