Abstract: A telescoping steering shaft, especially an intermediate steering shaft, with an inner rod (1) and an outer tube (2), placed thereon in twist-proof fashion and able to slide lengthwise by means of a roller bearing unit (3), while the roller bearing unit (3), which can move axially relative to the inner rod (1) and outer tube (2), has a plurality of rolling elements (5) held in a retainer (4), and is configured such that at least one driver (6) is mounted in the roller bearing retainer (4), engaging by form fit with the wall of the inner rod (1) and the outer tube (2).

Abstract: A trailer provided with a manoeuvring device. The manoeuvring device has a pivoting frame that can be moved with respect to the chassis of a trailer, such as a caravan, and is provided at the end with a roller driven by an electric motor. This roller does not engage on one of the wheels but is itself able to function as a wheel. Lifting of the chassis of the trailer is achieved with the aid of the pivoting frame, as a result of which the existing wheels at least partially lose contact with the ground surface.

Abstract: A steering shaft for motor vehicles which comprises an inner and an outer shaft part. Each shaft part has a polygonal cross section. The shaft parts engage one another in telescoping fashion and are positively connected to one another by barrel-shaped rolls that are effective as rolling elements for the transmission of a torque. The running paths of the rolls are fashioned between vertices on the outer sides of the inner shaft part and the inner sides of the outer shaft part and are designed so that the running paths are fashioned as troughs of a concavity approximating to the convexity of the rolls.

Abstract: An accumulator (20) operating according to the layered storage principle is used in connection with the cooling loop of a vehicle, and includes charge alternation devices (34, 38) adapted to upper and lower storage regions (26, 28). The inflow and outflow velocity of the coolant should be between 0.1 and 0.5 m/s, and charging or discharging of the accumulator (20) should occur within 10 to 100 seconds. Inflow and outflow lines (32, 36) run within an insulation space (40) in the fashion of a thermosiphon.

Abstract: A heat accumulator comprises an interior envelope containing an accumulator core, an exterior envelope surrounding the interior envelope at a distance therefrom so as to form an insulating chamber, two lines extending through the insulating chamber and including an inflow line and an outflow line for a heat conveying medium, each of the lines having a line section extending in the insulating chamber, the line sections being formed of a metal having low heat conducting capability.

Abstract: In order to control the temperature of the transmission oil of a motor vehicle driven by a liquid-cooled engine, a coolant/transmission oil heat exchanger is provided. The coolant stream supplied to the heat exchanger is miscible in a thermostatic valve from recooled and non-recooled coolant in order to achieve a desired temperature. Preferably the thermostatic valve is controlled by the temperature of the transmission oil, but it is also possible to have two expanding material elements as control pistons of the thermostatic valve, with one control piston being provided in the oil chamber of the thermostatic valve and the other control piston being provided in the coolant mixing chamber of the thermostatic valve. It is also possible, for purposes of precontrol, to electrically heat at least one of the control pistons.

Abstract: A heat accumulator, in particular latent-heat accumulator, has an inner casing containing an accumulator core and with an outer casing enclosing the inner casing at a distance thereto so as to form an insulation space, the insulation space being baked out and evacuated. The inner casing has a pipe connection with a fill opening through which the storage medium can b introduced and which can be closed by a mechanical closing element after the storage medium has been introduced. The outer casing has a pipe connection with a fill opening through which the insulation space can be filled with insulating medium and or evacuated and which can be closed by a mechanical closing element. The pipe connection of the inner casing is disposed coaxially to the pipe connection of the outer casing. This simplifies manufacture of the heat accumulator.

Abstract: In a heat exchanger having a heat exchanger network with a plurality of tubes and at least one base plate having a plurality of passages for tube ends, the passages in the base plate are substantially triangular.

Abstract: A heat accumulator, in particular a latent heat accumulator has an inner jacket arranged to surround an accumulator core and an outer jacket surrounding the inner jacket so as to form an insulation chamber therebetween, two conduits extending from the insulating chamber outside and forming a supply conduit and a return conduit for a heat transporting medium and elements for counteracting heat losses and associated with the conduits, each of the conduits in its course having a conduit interruption and being provided with a thermal insulation in the region of the conduit interruption so as to form the heat losses counteracting elements.

Abstract: In a method of making a heat exchanger having a heat exchanger network with a plurality of tubes and at least one base plate having a plurality of passages for tube ends, the passages in the base plate are triangular, and the tube ends are triangular prior to insertion into the base plate. The triangular tube ends are inserted into the triangular passages in the base plate and thereafter expanded to a tight fit.

Abstract: The method of making a round-rolled part for a heat exchanger comprises connecting the tubes and the irradiating elements to each other to form a rectilinear network, clamping both ends of the rectilinear network and stretching and bending the clamped network so that it assumes an arcuate shape. The premise adopted is that of a network of flat tubes consisting of rectangular tubes and irradiating elements between them, the tube network being bent round around a narrow side of the tubes. The network has one end rigidly gripped on the bending tool. The tubular network is wound onto it by rotating the latter. There is applied to the other end of the network a retaining force which counteracts the winding-on force and which maintains the tube network under tensile stress. The apparatus comprises a rotatable round bending tool and a clamping means which tangentially clamps the end of the network. Spaced from the round bending tool there is a mating holder for firmly gripping the other end of the network.