Abstract: A reactor, especially for exothermic reactions like methanol synthesis, comprises a tube bundle in which the coiling tube extends through a body of particles to facilitate the discharge of depleted particles from the catalyst space and to increase the pressure resistance of the assembly, the tube sheet at the opposite ends of the bore being convex inwardly. The tube bundle has a helical configuration and the tube sheets are hemispherical in shape in the region where the tubes intersect with the tube sheet. The tubes intersect the bottom tube sheet in radial rows of openings wherein the rows are spaced to facilitate the discharge of catalyst particles.

Abstract: A fuel injection system (FIG. 1) provided with pump/nozzles is proposed, which has a central fuel metering device which functions with a deviation or metering piston and a distributor or multi-way valve as a metering control member.

Abstract: A pump/nozzle for internal combustion engines is proposed wherein the hydraulically driven pump piston is braked in its motion after the pressure line leading to the injection valve is closed. The braking is effected after delivery is ended by means of the fuel which is forced out of an end section of the pump work chamber which serves as a filling chamber. Braking or damping occurs with a delay by means of a throttle apparatus, and in a further embodiment, braking occurs simultaneously with the relief, to a lower standing pressure level of the pressure line.

Abstract: A composite underground shaft lining assembly particularly suitable for use as a leak proof water conduit is formed with a plurality of annular concrete sections joined together by interposed layers of flexible joint material forming a composite concrete cylinder, with a composite steel cylinder formed of annular steel sections being arranged about the outer cylindrical surface of the composite concrete cylinder. The annular steel sections of the composite steel cylinder are joined together by spring rings located adjacent the flexible joints formed between the annular concrete sections.