A pump assembly comprising a stator and a rotor having vanes of opposite handed thread arrangements is described. A radial gap is located between the stator vanes and the rotor vanes such that rotation of the rotor causes the stator and rotor to co-operate to provide a system for moving fluid longitudinally between them. The operation of the pump results in a fluid seal being is formed across the radial gap. The described apparatus can also be operated as a motor assembly when a fluid is directed to move longitudinally between the stator and rotor. The presence of the fluid seal results in no deterioration of the pump or motor efficiency, even when the radial gap is significantly greater than normal working clearance values. Furthermore, the presence of the radial gap makes the pump/motor assembly ideal for deployment with high viscosity and/or multiphase fluids.

A vortex pump including: a housing including a suction channel, a discharge channel, and a housing space communicating with the suction channel and the discharge channel; and an impeller housed in the housing space and configured to rotate about a rotation axis, where the housing includes an inner channel along an outer circumference of the impeller in the housing space, and a channel cross-sectional area of the inner channel is larger than a channel cross-sectional area of the suction channel and is larger than a channel cross-sectional area of the discharge channel over an entire length of the inner channel.

A material mover assembly, comprising a chamber having an inlet and an outlet; a first paddle; and a second paddle, wherein the first paddle is positioned in and configured to rotate circumferentially in the chamber, the second paddle is positioned in and configured to rotate circumferentially in the chamber, or is configured to be inserted into and retracted out of the chamber, and wherein relative motion of the first paddle and the second paddle causes material to be pulled into the chamber via the inlet and pushed out of the chamber via the outlet in a forward direction. A material mover assembly may be reversible in pumping direction and further may be used as an energy generator in either direction.

A material mover assembly, comprising a chamber having an inlet and an outlet; a first paddle; and a second paddle, wherein the first paddle is positioned in and configured to rotate circumferentially in the chamber, the second paddle is positioned in and configured to rotate circumferentially in the chamber, or is configured to be inserted into and retracted out of the chamber, and wherein relative motion of the first paddle and the second paddle causes material to be pulled into the chamber via the inlet and pushed out of the chamber via the outlet in a forward direction. A material mover assembly may be reversible in pumping direction and further may be used as an energy generator in either direction.

The present invention relates to a flow controller configured to selectively act as a pump or as a flow regulator. The flow controller comprises: an inlet for a fluid; an outlet for the fluid; a pump assembly arranged between the inlet and the outlet and configured to pump the fluid through the flow controller from the inlet to the outlet; a hydro electrical generator assembly arranged between the inlet and the outlet, the hydro electrical generator assembly configured to allow the fluid flow through the flow controller from the inlet to the outlet and to generate electricity by transforming flow energy of the fluid flowing through the flow controller into electricity; and a mode controller configured to selectively set the flow controller in a pumping mode or in an electricity generating mode.

There is disclosed a compressor comprising a case comprising a discharging part provided one side and configured to discharge a refrigerant, the case defining a predetermined space for storing oil; a drive part comprising a rotor coupled to an inner circumferential surface of the case and having coils wound there around and configured to generate a rotation magnetic field, and a rotor mounted in the rotor and configured to be rotatable by the rotation magnetic field; a shaft extending in a state of being coupled to the rotor; a compression part lubricated by the oil in a state of being coupled to the shaft and configured to compress and discharge the refrigerant; and a sealing part extending from the stator towards the compression part and configured to induce the winding of the coil.

A boundary layer turbine having a housing with an inlet that receives pressurized fluid, a rotatable shaft extending through the housing, nested cylindrical tubes of progressively wider diameter connected coaxially about the shaft wherein adjacent tubes define a cylindrical fluid passageway there-between that is in fluid communication with the inlet and an outlet, and at least one nozzle coupled to the inlet configured to direct the flow of fluid from the inlet into the plurality of passageways and against the plurality of tubes at an angle to a normal plane to the curvature of the plurality of tubes and at an angle to the longitudinal axis of the shaft, wherein the angled flow of fluid imparts rotation to the plurality of tubes and the shaft and flows towards the outlet where the fluid is discharged, and wherein the rotating shaft may be used to provide kinetic energy.

An electric fuel pump includes a housing having an oil inlet and an oil outlet, an impeller, a stator unit mounted in the housing and including a stator and a starter terminal set connected to the stator, a packaging adhesive encapsulating the stator and the starter terminal set to create an oil guide passage in communication between the oil inlet and the oil outlet, and a rotor unit mounted in the housing and including a rotor rotatably mounted in the stator and a rotating shaft mounted in the rotor and connected with the impeller. When the stator unit is electrically conducted, the rotor unit drives the impeller to draw a fuel oil into the oil guide passage. When the fuel oil goes through the oil guide passage, the stator and the starter terminal set are well protected by the packaging adhesive and prohibited from contacting the fuel oil.

Provided is a regenerative blower. According to an illustrative embodiment of the present invention, the regenerative blower comprises an impeller comprising a plurality of blades disposed spaced apart in the circumferential direction, wherein, in the plurality of blades, each blade gap is arranged at an incremental angle (i).

In accordance with at least one aspect of this disclosure, embodiments of fluid pumps, pump cases, valve bodies, and volutes are disclosed herein. Embodiments of methods for manufacturing fluid pumps, pump cases, valve bodies, and volutes are also disclosed herein. Embodiments can include additive manufacturing, for example. Certain embodiments can include additively manufacturing a pump case in a tilted orientation, utilizing only coincidental support structure having a unique shape, and with teardrop shaped volute and/or valve body.