A centrifugal pump including an outer case; an inner case; a first unit and a second unit placed in fluid communication with each other, each unit including a plurality of impellers; the inner case includes two half-parts joined along a connection plane containing the axis of rotation; a connecting element is placed between the first unit and the second unit, the connecting element is engaged with a last impeller of the first unit and with a last impeller of the second unit.

A non-return valve (19) for a water supply system (1) or a pump (4) is integrated in a flow channel (14) of the water supply system (1). The non-return valve (19) includes a sealing body (21) which is mounted within the channel (14), blocks the channel (14) in a first position forming the closure position and releases the channel (14) in a second position forming the opened position. The sealing body (21) is movably arranged on a holder (31) which includes a closure body (15), with which the holder (31) is releasably fastened in a housing opening.

A well pump includes a plurality of diffusers, wherein each diffuser comprises a first threaded coupling on one longitudinal end and a second threaded coupling on an opposed longitudinal end. An impeller is disposed in each diffuser. The plurality of diffusers are coupled end to end to form a pump housing, in which the first threaded coupling on one diffuser is threadedly engaged to the second threaded coupling on adjacent diffuser.

A ring section pump features a low-pressure end configured to receive fluid to be pumped into the ring section pump; a high-pressure end configured to provide the fluid to be pumped from the ring section pump; and an intermediate tie rod combination having a intermediate flange with upper tie rods configured to couple together the intermediate flange and the high-pressure end and with lower tie rods configured to couple together the intermediate flange and the low-pressure end. The low-pressure end has an inlet flange; the high-pressure end has an outlet/discharge flange; and the upper tie rods couple together the intermediate flange and the outlet/discharge flange and the lower tie rods couple together the intermediate flange and the inlet flange.

Technologies are generally described for holding an impeller of a pump assembly in place axially with an impeller locking collar by loading the collar against a ring element. In a centrifugal pump assembly, one side of the shaft has a larger diameter for the impeller to abut against. The other side of the shaft may be fitted with an impeller locking collar comprising two portions that can be threaded together and hold the impeller in place by tightening against a ring element such as a split ring or spiral lock. Anti-rotation to avoid loosening of the impeller locking collar may be achieved by providing counter threads against a shaft rotation. Secondary anti-rotation may be provided by one or more set screws in the impeller locking collar.

The present invention relates in general to the field of water pumps, and more specifically, to an attachment configured to connect to the rear wheel of a motorcycle or motorscooter to provide power to a water pump and a method of pumping water using the attachment. One aspect of the aquacycle pump includes a base plate and a kick-stand support bracket configured to slidably adjust so that the aquacycle pump may be compatible with different sizes of motorcycles or motorscooters. The aquacycle pump may further include a roller that is configured to abut against the rear wheel of the motorcycle or motorscooter. The aquacycle pump may further include a water pump, wherein the water pump is connected to the roller. The aquacycle pump is configured such that as the engine of the motorcycle or motorscooter is started and power is provided to rotate its rear wheel, the abutting roller of the aquacycle pump also rotates. The rotation of the roller, in turn, operates the water pump to convey water to a location where water is needed. The purpose of the invention is to provide a device and method that may utilize existing motorized vehicles prevalent in developing countries (e.g., motorcycles, motorscooters), instead of electricity or petrol generators, to provide energy to a water pump for delivering water.

A pump is provided for immersion in a fluid reservoir, such as a pit or lagoon containing liquid manure, from a position at an edge of the reservoir. The pump may be adapted for connection to a farm vehicle, such as a tractor, positioned at the edge of the reservoir. The pump comprises an extensible body, fluid conduit and drive means in order that a length of the pump may be varied in order to accommodate a variety of reservoir fluid heights. In addition, the pump may be pivotable relative to at least a portion of a frame in order that the entrance angle may be adjusted. The pump may comprise a housing with an inlet and an outlet, the outlet in fluid communication with the fluid conduit. An impeller within the housing may direct fluid from the inlet to the outlet in the housing.

A related heating or cooling apparatus, namely a fluid circulator (100) for heating or cooling systems comprising: a body pump (1) having an impeller for moving the fluid; an electric motor (2) for rotating the impeller, the electric motor (2) comprising at least one electrical winding (21); at least one terminal (22) of an electrical power supply wiring of the electric motor (2); at least one electrical connection (5) between the terminal (22) and an end of the at least one electrical winding (21). The at least one electrical winding (21) is made of aluminum or alloys thereof, and the fluid circulator is provided with a protection element configured for sealingly enclosing the at least one electrical connection (5).

A laundry treating machine includes a case, a tub, a drum, a drain pump housing, and a drain pump motor, wherein a plurality of fastening protrusions that are formed at one of the drain pump housing and the drain pump motor are inserted into a plurality of fastening grooves that are formed at the other of the drain pump housing and the drain pump motor, and wherein a length of one fastening protrusion is formed to be different from lengths of the other fastening protrusion such that the drain pump housing and the drain pump motor is prevented from being assembled wrongly.

An assembly structure of a multi-stage impeller and wheel housing for use in a submersible pump that includes a connecting seat having a drainage channel, shaft, intermediate unit which has a wheel housing, inner guide cover, and impeller. The wheel housing has a central partition plate, with an upper ring housing and lower ring canopy extending upward and downward, respectively, along the perimeter of the central partition plate. The intermediate unit has the upper ring housing connected to the canopy of the connecting seat by a swivel snap structure. A bottom unit has a bottom impeller and bottom wheel housing, which has a water suction port, a bottom plate and a bottom ring housing that extends upward along the perimeter of the bottom plate. A bottom ring canopy of an intermediate unit is connected by a rotating snap structure, and the bottom ring housing is pressed by a sealing ring.