A microfluidic pump composed of a cylindrical chamber, transfer ports having an inlet port and an outlet port positioned on the cylindrical chamber, a magnet member attached outside the cylindrical chamber, a magnetic piston in sliding communication with an inner wall of the cylindrical chamber, a magnetic material, and a valve member. The magnetic material self assembles to form a seal plug separating the inlet and outlet port, where the seal plug forms a link between the magnet member and the magnetic piston to rotate the magnetic piston along the inner wall of the cylindrical chamber, where a working fluid suctioned within the cylindrical chamber is discharged at the outlet port during a movement of the magnetic piston from the inlet to outlet port. The valve member positioned at the outlet port prevents the backflow of the working fluid towards the inlet port after the magnetic piston rotates past the outlet port.

A surface-driven fluid recovery system for recovery of hydrocarbons, having an uphole prime mover, typically an electric motor, and an uphole speed-reduction transmission to reduce speed of rotation supplied by the prime mover to a rod string to thereby reduce frictional and cyclic fatigue stresses imparted on the rod string. A downhole speed-increasing transmission is provided to increase rotational speed prior to supply of rotational energy to a downhole centrifugal or progressive cavity pump, to thereby allow optimal rotational speeds to be supplied to the downhole pump. A magnetic coupling is interposed between the prime mover and the speed reduction gearbox or between the speed reduction gearbox and the rod string, to advantageously provide damping of high transient rotational stresses between the prime mover and the rod string and/or provide a means for selectively coupling or partially coupling/decoupling the rod string to the prime mover.

A magnetically engaged pump includes a pump housing with a rotatable magnetic drive assembly, a cylindrical canister and a rotatable driven magnet assembly. This magnetic coupling is associated with a pump rotor and a laterally positioned gear wheel to define a gear pump. This magnetic coupling is alternatively associated with a pump rotor with an impeller to define a centrifugal pump. Either pump includes a stationary shaft to mount the driven magnet assembly and pump rotor. A rotatable carrier with bushings and thrust bushings coaxially supports the rotatable driven magnet assembly and pump rotor.

A pump (10) comprising a casing (12) that encloses a pumping group (14). On the casing (12) at least one inlet conduit (F) and at least one outlet conduit are obtained. The pumping group (14) comprises a pair of mutually coupled gears defining a pump chamber. A first support shaft (16) is operatively connected to an actuator assembly (18) so that the first gear can operate as a driving gear to set the second gear in rotation. The pump (10) comprises at least one element (20) for compensating the increase in volume of the fluid (F) and/or the increase in the pressures inside such a pump (10). The element (20) for compensating the pressure/volume is at least partially manufactured from a shape memory metal alloy having superelastic properties.

The disclosure provides a gear pump rotor assembly that includes a rotor body, a rotor head having a plurality of gear teeth and being connected to the rotor body, at least one connector extending between the rotor body and the rotor head, at least one radial deformation control member that extends into at least one gear tooth of the rotor head and reduces the radial deformation of the rotor head relative to the rotor body when a change in temperature causes radial deformation of the rotor body and rotor head.

A rotor assembly for a rotary fluid device that includes a first body at least partially exposed to a process fluid, a second body at least partially exposed to the process fluid, a connecting apparatus that includes at least one connector and at least one seal that connects the first body to the second body and seals the at least one connector from exposure to the process fluid.

A gear pump according to the present invention is configured such that a first pump chamber comprises a first intake space into which a fluid is taken in and a first discharge space from which the fluid is discharged, in accordance with rotation of an internal gear and external gears, a second pump chamber comprises a second intake space into which the fluid is taken in and a second discharge space from which the fluid is discharged, in accordance with rotation of the internal gear and the external gears, the first intake space and the second intake space are provided to be symmetrical about a rotational center of the internal gear, and the first discharge space and the second discharge space are provided to be symmetrical about the rotational center of the internal gear.

To reduce frictional heat generated between a rotation shaft and a bearing portion in a gear pump in which the rotation shaft having a gear mounted thereon is received by the bearing portion and an image recording apparatus having the gear pump. Provided is a gear pump which has a rotation shaft, a bearing portion which receives the rotation shaft, and a gear which is mounted on the rotation shaft and rotates with the rotation shaft, in such a manner that the gear feeds liquid. Furthermore, at least either a concave portion or a convex portion is provided in at least either the rotation shaft or the bearing portion.

A pump arrangement is disclosed including a magnetically drivable micropump for pumping a liquid pumping medium, a bearing carrier as a base part, and an outer magnet and an inner magnet which transmit a torque to the micropump via an axial shaft. Three radial bearing pieces for the rotational mounting (guidance) of the shaft and of the micropump are positioned and fixed in the bearing carrier. The micropump is held in an eccentric bearing by a cover arranged at an end. A duct structure for a forced flow is provided including at least one radial duct portion in the cover and an axial duct portion in the bearing carrier to flush and/or to lubricate the bearings actively with the pumping medium. One of the bearings is arranged closer to the inner magnet and/or another of the bearings is arranged closer to the micropump.

The present disclosure provides a multi-piece containment canister assembly for use in magnetically coupled fluid handling devices such as rotary pumps, mixers, flowmeters or valves. The canister assembly includes a generally tubular single-piece body and an end cap that are sealingly fastened together to form a generally cup-shaped canister. The canister body may be made of strong, non-conductive or low conductive materials, such that it greatly reduces eddy currents. The generally tubular shape of the canister body is easier, and therefore less costly to manufacture than typical cup-shaped canisters.