Abstract: An electric drive unit for a vehicle is disclosed which has two electric machines axially aligned and connected with each other in mirror image. Each electric machine has a casing (3), a rotor (2) having a wheel body (16), an inner annular stator (4) including stator windings (5), having an axial, substantially cylindrical recess (11). The stator is attached to the casing (3), a rotor shaft (7) is attached to the wheel body (16) and extends into the substantially cylindrical axial recess (11) of the stator (4). There are first mounting means (20) rotatably mounted within the housing and relative thereto for mounting the rotor shaft (7); and an output coupling means (8, 9, 19, 25, 26) having a connecting flange (25, 26) for detachably connecting an output shaft thereto, the output coupling means (8, 9, 19, 25, 2 86) being disposed substantially within the axial cylindrical recess (11).

Abstract: A stand is provided for mounting various loads and is balanced at least partially automatically. The stand includes a plurality of interconnected elements defining one or more axes about which the stand is movable. An open-loop or closed-loop control circuit is provided for at least one of the axes and detects the unbalanced state about the one axis. The control circuit allows a torque compensating device to operate on the one axis until a state of equilibrium is obtained.

Abstract: An axial piston motor of adjustable swept volume for installation in a wheel hub, having a motor housing which is open on one side and is closed by a connection block, an output shaft rotatably mounted in the housing and a connection block, an adjusting device for adjusting the swept volume, a step-down gear unit driven by the output shaft and having a driving toothed wheel for the drive of the wheel hub, and a brake associated with the output shaft on the connection block.

Abstract: The invention contemplates a support stand having a weight-compensating four-bar linkage in the form of an elongate parallelogram, for adjustable-elevation support of an observation instrument such as an operation microscope. Weight compensation is achieved by a preloaded spring contained within opposed channels which constitute two elongate members of the linkage and which have nesting side walls to complete the enclosure of the spring, while also accommodating such electrical and optical cable connections as may be needed to communicate between the instrument and the base of the stand.

Abstract: The invention contemplates an operation microscope in which three-dimensional viewing adjustment is possible with respect to an object (8) to be observed, all without forcing the surgeon or any co-observing person or instrumentality to move. To this end, the exit pupils and thus all viewing windows are positionally invariant, i.e., they are stationary and therefore can be securely related to a microscope support (5). An objective housing (7) in front of the microscope housing (1) is associated with all viewing systems (2, 3, 4), and this objective housing contains an objective of variable back focus as well as optical components (11, 12) for selective deflection of the observation ray path in each of two polar-coordinate directions. In making any one or all of the three-dimensional viewing adjustments, only elements of relatively low mass within the objective housing (7) need be moved.

Abstract: An internal spline of a hollow shaft containing a hydrostatic motor receives an external spline of a sleeve extending from a planetary carrier being part of a two-stage planetary gear transmission for imparting rotation on a hub being journalled on the shaft. An annular disk with radially inwardly directed teeth has been slipped onto the external spline, with play between it and the carrier; after turning the disk to align its teeth with the external spline ridges, it is releasably secured to the shaft end after the latter's internal spline has received the external spline. The disk permits relative axial movement of the carrier bounded by it and by the external spline.