Abstract: A replaceable nozzle for use in high temperature environments. The nozzle includes a high-temperature-resistant, metal nozzle body that at least partially penetrates into the high temperature environment and a pipe that is connected to the nozzle body for supplying fluid. The nozzle also includes an expansion collar made of a high-temperature-resistant material, a nozzle block and a separating surface or a separating layer of high-temperature-resistant, elastic material. The expansion collar is designed to be disposed between the metal nozzle body and the nozzle block.

Abstract: A disc retarding conveyor comprises at least one continuous tractive element. At least two-part static plates are mounted on the tractive element. The static plates are separated from each other at a distance in the tractive direction. The static plates are divided in the cross-sectional plane of the tractive element into two preferably identical halves. Each half has a radial cut hole which permits the halves of the static plate to be mounted concentrically onto the tractive element.

Abstract: A scraper device to clean conveyor belts includes a bearing axle located below the conveyor belt for a blade holder having spring arms which can be mounted on the axle. The holder carries scraper blades at the end which in a preset angle of pitch are pressed against the conveyor belt. The spring arms comprise parallel guide rods of resilient material. The arms support the blade in a vertical position pressed against the lower segment of the belt. The angle of pitch is, in an advancing position of the scraper blades, maximally up to 10.degree.. In this way, with minimal wear and tear, optimum cleaning effects are achieved which, at the same time, show careful treatment of the belts.

Abstract: A blowing device for the elimination of compactions in bulk material storage silos by using air blasts, includes a compressed air storage container, a compressed air supply duct, a compressed air outflow duct and an interposed rapid exit valve. The rapid exit valve has a conduit in which a valve closure is guided whereby the conduit turns into the compressed air supply duct forming an afflux cross-section for the valve piston over a miter cut or tube turn. The afflux cross-section is selected to be significantly greater than the outflow cross-section in the compressed air outflow duct. In this way, the flow losses, and pressure losses, otherwise customary are considerably reduced, so that extremely high flow velocities can be achieved in the compressed air outflow duct until the velocity of sound is reached. The result is a rapid impulse-like discharge of the compressed air storage container and, consequently, faultless elimination of possible compactions.