Abstract: Building element system comprising first and second building elements, in particular toy building elements, wherein, for the releasable connection of a first building element to a second building element, a first connecting means is provided on the first building element and a second connecting means is provided on the second building element, which connecting means can be latched together, wherein the first connecting means (2) is a circular bore (3) situated on the building element side and having at least two latching projections (4) which jut inward in the manner of a chord, and the second connecting means (15) is an annular bead (16) configured on a projection (17) situated on the building element side.

Abstract: A method for the repair of a component by a solder is disclosed. The method is performed under specifically selected vacuum conditions in order to prevent oxidation and vaporization.

Abstract: A hydraulic aggregate for supplying a hydraulic cylinder in consecutive load strokes is monitored for its working load in order to determine the condition of the aggregate automatically. For this purpose, the time integral of the pressure is determined for each load stroke. The pressure and duration are processed into a characteristic number which indicates the wear. This makes it possible to diagnose the condition of the hydraulic aggregate at any time.

Abstract: The invention relates to a method for joining components by means of tensioning bolts. According to said method, the pressure is linearly increased over time when the tensioning bolt is hydraulically tensioned by means of a tensioning device. When a target value (Pmax) is reached, the volume is blocked so that no more hydraulic oil is supplied. The pressure decreases when the components show a setting behavior during a holding time (tH). Pumping is resumed when a lower threshold value (Pi) is reached, resulting in a pressure increase up to the target value (Pmax). The invention prevents a setting process of the components from preventing that the projected pretension of the tensioning bolt is reached.

Abstract: The hydraulic aggregate comprises, within a container (10), a reservoir (11) for hydraulic oil. A pump (15) driven by a motor (18) is arranged in the reservoir (11). The motor (18) is a pneumatic motor. An electric control unit (30) for controlling a main valve (23) is mounted on the container (10). The main valve causes a reversal of the stroke direction of the hydraulic connections (13,14). The division into pneumatics and low power electronics leads to an explosion-proof embodiment of low weight and little technical complexity.

Abstract: A power wrench (10) for turning a screw is supplied by a hydraulic unit (25) that contains a positive displacement pump (26) and supplies a defined rate of flow. The pressure in a hydraulic pressure line (28) is measured by a pressure sensor (32) and provided to a control unit (31). The volume flow of the hydraulic unit (25) is determined in amount per unit of time. The piston stroke per unit of time can be determined due to the fact that the filling volume of the hydraulic cylinder is known. The piston acts upon a lever system that turns the moving part. The turning angle per unit of time can be determined due to the fact that the lever length is known. This makes it possible to dispense with an angle measuring device and to determine the turning angle merely by measuring pressure.

Abstract: A method for the repair of a component by a solder is disclosed. The method is performed under specifically selected vacuum conditions in order to prevent oxidation and vaporization.

Abstract: Many known solder alloys according to prior art utilize silicon or boron as melting point reducers, which, however, form brittle phases that have an undesirable effect on the thermo-mechanical properties. The invention relates to a solder ally that comprises gallium and/or germanium, preferably forms the Y? phase and has improved mechanical properties.

Abstract: The invention relates to a toy vehicle for collecting and conveying garbage, paper or the like, having a collection container with charging hole, and distinguished by a collecting and emptying arrangement for a garbage can, paper can or the like.

Abstract: A boom assembly for a bucket of a toy vehicle comprises at least one bucket bearer, which is articulated to a frame of the toy vehicle by a first swivel joint, and at least one telescopic support with two telescopic elements, which can be displaced in telescopic manner with respect to one another. One of the telescopic elements is articulated to the bucket bearer by a second swivel joint, the other telescopic element is articulated to the frame by a third swivel joint. Furthermore, at least one latch mechanism is provided, the latch mechanism having a latch body which is provided on one of the telescopic elements, and a counter body which is provided on the bucket bearer. The bodies of the latch mechanism are positioned with respect to one another such that when the bucket bearers are moved from a lowered basic position into a raised position, the latch body comes to rest against the counter body before the raised position is reached, the telescopic support being bent with the production of a bending tension.

Abstract: The invention relates to a hydraulic power wrench comprising a ratchet lever (16) driven by a hydraulic cylinder. According to the invention, said power wrench is provided with a friction brake (20) which operates continuously between the housing (10) and the output shaft (14). In this way, reversed rotations of the output shaft following the individual working strokes are avoided.

Abstract: A constructional system comprises a plurality of building blocks and one or more connectors. In order to propose an improved constructional system, the building block (1) is characterized by a square assembly opening (2) which is surrounded by an assembly funnel (3)(FIG. 1).

Abstract: A power wrench (10) for turning a screw is supplied by a hydraulic unit (25) that contains a positive displacement pump (26) and supplies a defined rate of flow. The pressure in a hydraulic pressure line (28) is measured by a pressure sensor (32) and provided to a control unit (31). The volume flow of the hydraulic unit (25) is determined in amount per unit of time. The piston stroke per unit of time can be determined due to the fact that the filling volume of the hydraulic cylinder is known. The piston acts upon a lever system that turns the moving part. The turning angle per unit of time can be determined due to the fact that the lever length is known. This makes it possible to dispense with an angle measuring device and to determine the turning angle merely by measuring pressure.

Abstract: The invention relates to a hydraulic group comprising a reservoir (28) for oil, in which a multiple piston pump (60) is arranged. The individual pumps (61) are cyclically driven by an eccentric ring (29). In order to ensure a permanent immersion of the individual pumps in the reservoir (28), an auxiliary reservoir (47) providing oil for refilling the reservoir (28) is arranged above the reservoir. The auxiliary reservoir (47) is connected to an additional tank (45) by means of a connection line (48).

Abstract: The control of the pressure supply to a piston-cylinder unit (10) is effected by monitoring the pressure in the corresponding line (16) through a pressure sensor (22). This pressure is measured in fixed time intervals and the changes in pressure are determined. When the change in pressure has become zero, it is detected that the set terminal pressure has been reached so that the working operation is ended. A switching to the return stroke is effected when the pressure increase in at least one time interval is greater than in at least one of the previous intervals of the working operation. The control is independent from the type of piston-cylinder unit employed and requires no sensors at the piston-cylinder unit.

Abstract: A combustion chamber (4) of a gas turbine (1), the combustion space (24) of which is bounded by an annular combustion chamber inner wall (28) and a combustion chamber outer wall (26), in which in order to generate a working medium (M) a supplied fuel is brought into reaction with supplied combustion air, and the combustion chamber wall (25) of which is provided on the inside with a lining formed from a plurality of heat shield elements (38), with the or each heat shield element (38) together with the combustion chamber wall (25) forming an inner space (40) to which a cooling medium (K) can be applied, is to be designed so as to provide a high level of system efficiency at the same time as having a comparatively simple structure and it should also be possible to disassemble the combustion chamber inner wall (28) in a time-saving manner.

Abstract: In a toy vehicle, in particular tractor, comprising at least two steerable wheels, with a pivoting motion of a steering wheel being converted via a steering gear into a pivoting motion of a bolster, with wheels being mounted on steering knuckles that are pivotably mounted on a front axle, and with the pivoting motion that is occasioned by a steering job pivoting steering pivot pins and thus the wheels via a track rod and via steering drop arms, it is provided, with a view to accomplishing the extreme wheel turning found in full size tractors also in a toy vehicle, mechanical conversion being put into practice in as simple and functionally safe a way and at as low a cost as possible, that the front axle is connected to a first end of the bolster; that the steering gear is formed on a second end of the bolster; that the bolster, between the first and the second end, comprises a pivot bearing for a pivoting motion relative to the chassis to be obtained; and that the track rod centrally comprises a pivot bearing

Abstract: In the method for controlling an intermittent screw process first a torque mode (DMM) is applied in which the torque is continuously measured. Upon attainment of a pre-torque (MF) a rotation angle mode (DWM) is carried out in which the rotation angle is measured. Proceeding from the rotation angle ?=0 (corresponding to the pre-torque (MF)) the rotation angle (?) is counted up during each stroke. In this connection that torque (MHE) is stored which has been reached at the end of the stroke. During the next stroke the angle (?) is continued to be counted only when the torque (MHE) at the stroke end of the previous stroke has been reached again. Upon attainment of a target angle (?z) the screw process is terminated.

Abstract: The invention relates to a gas turbine comprising a combustion chamber, into which fuel and combustion air are fed and caused to react, in order to produce a working fluid. The aim of the invention is to provide a particularly simple construction, which achieves a relatively high degree of efficiency for the installation. To achieve this, the inventive combustion chamber can be cooled and has a tubular structure, the combustion chamber wall being composed of coolant pipes.

Abstract: In a toy garbage transportation truck comprising a cargo space (3) for the garbage that is to be disposed of, having an opening (4) on its rear to which an emptying casing (5) for garbage cans that are to be emptied is adjoined that has a rear discharge opening (7), provision is made that the floor (9) below the discharge opening is curved approximately in the shape of a segment of a circle, the floor (9) transitions into a slanted feeding surface (10) that extends to below a feeding opening (6), the conveyor shovel (12) is disposed above the floor (9), the conveyor shovel (12) can be swiveled along the floor (9) above the same, lifted parallel to the slanted feeding surface (16) to at least the lower edge of the feeding opening (6) and subsequently swiveled back and lowered to reach the end of the floor (9) on the opening side and repeat the conveyor movement again.