Abstract: Silo for storing solidify loose material, especially flue ash, which has a conveyor which can be moved on the surface of the stored material and which feeds the material loosened there to a conveyor device located in the silo which brings it to an exit opening provided on the silo floor. This conveyor device is simply and effectively constructed in accordance with the invention by forming it by a falling series of aeration devices on an essentially vertical silo wall. This silo wall is advantageously the circumference of a column provided in the center of the silo. In a first embodiment the mechanically separated and pneumatically loosened material passes through slideless openings into the inner space in the column, from which it is removed at the bottom. In a second embodiment the aeration devices are arranged on the circumference of the column in such a compact series that they result in the formation of an emptying column which follows the column surface and is filled by material fluidized by aeration.

Abstract: Disengageable clutch with two clutch flanges which enclose a meshing arrangement which can be released and closed by axially shifting one of the two clutch flanges. The meshing arrangement is formed by pairs of bores which are opposite each other in the flanges and by balls. A nut is used to engage the clutch, which nut can be screwed on the spindle carrying the clutch flanges. A spring between the nut and the movable clutch flange holds the clutch flanges and the meshing arrangements against each other in the disengaged state, but when the shaft is turned manually it allows the balls to jump out of one of the associated bores. The rotary position in which the clutch can be engaged by tightening the nut is easy to find on account of the click-stop action of the balls.

Abstract: Mixing silo for pneumatically homogenizing fine-grained or dust-like material, the bottom of which comprises groups of aeration zones which can be alternately supplied with compressed air in such a manner that in each group a bottom zone partially limited by the outer limit of the silo bottom is heavily aerated and a bottom zone located between the heavily aerated bottom zones is aerated only weakly. An even, progressive circulation of the entire silo contents with little expenditure of energy is achieved by separating the heavily aeratable bottom zones from each other with a star-shaped, exclusively weakly aeratable bottom zone and by constructing the outlet as an overflow.