Abstract: A non-return valve for a hydraulic tensioning system which is used in traction mechanism drives of internal combustion engines and which manipulates a hydraulic fluid flow between a pressure chamber and a reservoir. The non-return valve has a valve body which is inserted in a housing and which is embodied as a ball and which, when the non-return valve is closed, is supported in a spring-loaded fashion against a valve seat of a through-flow cross-section. When the non-return valve is open, the valve body is assigned to a valve seat of the housing and the flow cross-section (19) of the valve seat ensures a fluid flow through the non-return valve.

Abstract: The invention relates to polynucleotides that are closely linked to the bolting gene or B gene within the sugar beet genome and can be used for the development of molecular markers. The invention further relates to molecular markers and kits comprising said markers that can be used for mapping, identification and isolation of the bolting gene or S gene in the sugar beet genome and to discriminate between the annual and bienniai genotype or between different haplotypes within plant groupings of sugar beet plants exhibiting a biennial genotype. The invention also relates to assays and methods of breeding sugar beet plants involving said markers.

Abstract: A friction wheel drive, especially for driving an auxiliary unit of an internal combustion engine in a frictionally engaging manner is provided. The friction wheel drive includes an adjustable friction wheel (3, 3?) which can be pressed at least against a contact disk (7, 9) of an output member (8) and/or an input member (10). In order to create a particularly simple, mechanically operating friction wheel (3, 3?), the friction wheel is provided with a running disk (5) which is mounted on a rolling bearing (19) that is fixed to the engine. The running disk (5) includes a tapered annular groove (24) having a width that can be varied by axially movable, spring-force impinged sidewalls (21). Further, a friction ring (4, 4?) having a diameter that is larger than that of the tapered annular groove (24) is inserted into the groove such that the friction ring (4, 4?) is disposed eccentric to the same, is guided in a radially movable fashion, and is spring mounted.

Abstract: A friction drive is provided, in particular for frictionally engaged driving of an auxiliary unit of an internal combustion engine, with an adjustable friction wheel (3), which can be brought into pressure contact with at least one contact disk (4, 6) of a drive element (5) and/or a driven element (7). A need-dependent drive of the auxiliary unit is achieved by a switchable coupling, which is used for need-dependent separation of the drive element (5) and auxiliary unit.

Abstract: In order to avoid evaporation of the propellant gas during the pressure-free filling of an aerosol formulation provided with a readily volatile propellant gas, the product to be filled is cooled prior to being fed into a metering means. In this context, fluoro-chlorinated hydrocarbons such as, for instance, R11 have been used up until now as the coolant, but their use is no longer permitted in Germany and in other nations.

Abstract: The invention relates to a computer system for knowledge management with a first database means for storing documents and meta-information on documents, a second database means for storing user data, a means for accessing an external data source for loading external documents and storing external documents in the first database means, a first program means for the inputting a search request by an internal client computer, a second program means for adding a document to the first database means by the internal client computer, a third program means for inputting an evaluation for a document of the first database means by an internal client computer, a fourth program means for awarding and storing bonus points to the credit of a user as a function of user behavior.

Abstract: A device for cleaning the outer cylindrical surfaces of cylinders in a rotary printing machine includes a cleaning cloth extending over the length of a respective cylinder and cooperating with a pressing-on element. The cleaning cloth is pressable against a respective outer cylindrical surface by the pressing-on element. The pressing-on element includes an elastically deformable body having an internal cavity. As internal pressure is applied to the hollow body, the hollow body expands to apply the cleaning cloth to the outer cylindrical surface of the cylinder. Suction is applied to the hollow body to return the cleaning cloth to a disengaged position a substantial distance from the outer cylindrical surface of the cylinder.