Abstract: A submersible agitator device for circulating drinking water includes a submersible motor including a cylindrical housing, from one end of which there extends a shaft, a hyperboloid agitator mounted on the shaft, a frame with a plurality of supports extending along the housing and connected to the housing, wherein the supports have radially outwardly angled bend portions, which extend over a peripheral edge of the hyperboloid agitator body in order to support the frame on a base, and a flow-guiding element, which is annular in plan view and which is mounted on the bend portions of the supports.

Abstract: A hyperboloid agitator for circulating liquids, in particular water, wastewater or the like, in the centre of which a connection portion (2) for connection to a hollow agitator shaft (1) is provided, characterised in that the hyperboloid agitator is formed as a hollow body, with a central aperture (3) for supplying air being provided in the connection portion (2), and in that an air distribution device (9, 10, 11) for distributing air supplied through the aperture (3) to a plurality of air outlet openings (14) provided in the hollow body is provided downstream of the aperture (3).

Abstract: An apparatus for aerating bodies of water includes a floating platform, a motor supported by the floating platform, a transmission which is coupled to the motor and whose output shaft is in the form of a hollow shaft, a fan for supplying air through an air supply line connected thereto, wherein the air supply line is connected to one end of the hollow shaft, a hollow stirring shaft coupled to the other end of the hollow shaft, an stirrer affixed to the free end of the approximately vertical stirring shaft, wherein the stirrer is designated as a hollow body and has a central opening through which air supplied by the stirring shaft can pass, and a multiplicity of air outlet openings.

Abstract: A wastewater purification apparatus includes an elongate tank, which has an inflow for feeding wastewater, a first vertical agitator with a first hyperboloid agitator body mounted on a vertical first agitator shaft and provided in a first treatment portion downstream of the inflow on the first narrow side, a second vertical agitator with a second hyperboloid agitator body mounted on a vertical second agitator shaft and provided in a second treatment portion downstream of the first vertical agitator, an aeration device with a fan for aerating wastewater received in the tank, a first drive device for rotating the first hyperboloid agitator body in a first rotation direction, a second drive device for rotating the second hyperboloid agitator body in a second rotation direction opposite the first rotation direction, and a decanter for discharging purified wastewater in a third treatment portion on a second narrow side opposite the first narrow side.

Abstract: The invention relates to a propeller, which is intended to be fastened to a shaft in a clamping manner, the shaft having a driver profile extending in the axial direction, wherein: the propeller is formed from multiple elements, each element (A, B, C, D) having a hub portion (1) with a counter profile (2) corresponding to the driver profile; a first connection portion (3) and a propeller blade (4) extending from the first connection portion (3) are formed on one side of the hub portion (1), and a second connection portion (5) is formed on the opposite other side of the hub portion (1); the first connection portion (3) is designed to bear interlockingly against a further second connection portion (5) of an adjacent further element (A, B, C, D); and, when the elements (A, B, C, D) are connected such that their connection portions (3, 5) bear against one another, the hub portions (1) of all the elements (A, B, C, D) complement one another to form a hub surrounding the shaft in an interlocking manner.

Abstract: A hyperboloid agitator for circulating liquids, in particular water, wastewater or the like, in the centre of which a connection portion (2) for connection to a hollow agitator shaft (1) is provided, characterised in that the hyperboloid agitator is formed as a hollow body, with a central aperture (3) for supplying air being provided in the connection portion (2), and in that an air distribution device (9, 10, 11) for distributing air supplied through the aperture (3) to a plurality of air outlet openings (14) provided in the hollow body is provided downstream of the aperture (3)

Abstract: An apparatus for aerating bodies of water, comprising a floating platform (19), a motor (15) supported by the floating platform (19), a transmission (16) which is coupled to the motor (15) and whose output shaft is in the form of a hollow shaft (17), a fan for supplying air through an air supply line (18) connected thereto, wherein the air supply line (18) is connected to one end (E1) of the hollow shaft (17), a hollow stirring shaft (1) coupled to the other end (E2) of the hollow shaft (17), an stirrer (K) affixed to the free end of the approximately vertical stirring shaft (1), wherein the stirrer (K) is designated as a hollow body and has a central opening (3) through which air supplied by the stirring shaft (1) can pass, and a multiplicity of air outlet openings (14).

Abstract: A submersible agitator device for circulating drinking water includes a submersible motor including a cylindrical housing, from one end of which there extends a shaft, a hyperboloid agitator mounted on the shaft, a frame with a plurality of supports extending along the housing and connected to the housing, wherein the supports have radially outwardly angled bend portions, which extend over a peripheral edge of the hyperboloid agitator body in order to support the frame on a base, and a flow-guiding element, which is annular in plan view and which is mounted on the bend portions of the supports.

Abstract: A stirring and aerating device for activated sludges, wherein a towerlike frame is formed by a carrier element (2, 3) receiving a drive device (1) and at least three support elements (4) extending from said carrier element, wherein an air inlet is provided for an aerating device (7) located in a plane beneath a stirring element (9) that is connected to the drive device (1) by the shaft (10). In order to increase service life of the device, the air is let in through a passage resembling a line that extends in a longitudinal direction in at least one of the support elements (4).

Abstract: A stirring and aerating device for activated sludges, wherein a towerlike frame is formed by a carrier element (2, 3) receiving a drive device (1) and at least three support elements (4) extending from said carrier element, wherein an air inlet is provided for an aerating device (7) located in a plane beneath a stirring element (9) that is connected to the drive device (1) by the shaft (10). In order to increase service life of the device, the air is let in through a passage resembling a line that extends in a longitudinal direction in at least one of the support elements (4).