An aircraft engine having a shaft, an engine casing, at least one bearing located between the shaft and the engine casing, the engine casing defining a bearing cavity containing the at least one bearing, an air distribution system configured to inject compressed air to the bearing cavity to in use provide a sealing air flow entering the bearing cavity, and a labyrinth seal having a seal rotor and a seal stator, fins extending from one of the seal rotor and the seal stator toward the other of the seal rotor and the seal stator, at least one of the fins extending in an angled upstream direction relative to a direction of the sealing air flow.

A wet-running pump bearing retainer (29) includes a radial bearing configured for a lubrication film between an inner sliding surface (41) and a rotor shaft (13) of a pump (1). The radial bearing is fitted into a radially inner section (49) that defines an axial fluid channel (45), located at a first radial distance (D1) to a rotor axis (R) and providing a fluid flow path (F1) in a first axial flow direction. The first radial distance is larger than a radius (D0) of the inner sliding surface. A radially outer section (51) extends from the inner section and defines a second axial fluid channel (47) for a flow path (F2) in a second axial flow direction, opposite to the first flow direction. The second axial fluid channel is located at a second radial distance (D2) to the rotor axis, which is larger than the first radial distance.

The present invention is directed to a spa tub (and to a spa chair that includes a spa tub) that has a sprayer with a thermal meter so that an employee does not need to touch or feel the water and/or fluids to gauge the temperature of the water and/or fluids. The spa tub may also have a water pump and/or an air pump assembly that is designed and configured to be mounted to the wall of a basin for providing massage therapy to a user. In addition, the spa tub may additionally have a liner and/or an air dispenser. As a non-limiting embodiment, a spa chair includes a spa tub, a basin, a mounting housing member, and a sprayer with a thermal meter. The spa chair may also include a jet assembly, an air pump assembly a spa base, a gasket or seal, an air dispenser, and/or a liner.

Embodiments of the invention are directed to a rotor for use in molten metal and devices including the rotor. The rotor has a rotor body and blades, wherein each blade includes a tip that is at least twice as hard as the rotor body.

Embodiments of the invention are directed to a rotor for use in molten metal and devices including the rotor. The rotor has a rotor body and blades, wherein each blade includes a tip that is at least twice as hard as the rotor body.

An aircraft engine having a shaft, an engine casing, at least one bearing located between the shaft and the engine casing, the engine casing defining a bearing cavity containing the at least one bearing, an air distribution system configured to inject compressed air to the bearing cavity to in use provide a sealing air flow entering the bearing cavity, and a labyrinth seal having a seal rotor and a seal stator, fins extending from one of the seal rotor and the seal stator toward the other of the seal rotor and the seal stator, at least one of the fins extending in an angled upstream direction relative to a direction of the sealing air flow.

A blood pump includes a housing having an inlet. A rotor disposed in the housing and configured to rotate substantially about the axis to pump blood from the inlet to the outlet. A stator is disposed within the housing and configured to drive rotation of the rotor about the axis. A bearing mechanism for supporting the rotor inside the housing includes a magnetic bearing configured to magnetically support the rotor inside the housing in a radial direction from the axis. The bearing mechanism includes a sliding bearing configured to physically support the rotor inside the housing in an axial direction along the axis of the housing and allow rotation of the rotor substantially about the axis, the sliding bearing comprising at least one point of contact where the rotor is configured to physically contact a trunnion affixed to the housing.

A centrifugal pump for delivering coolant in vehicles and providing a centering of a pump impeller and a dampening of motor vibrations. The centrifugal pump having a pump housing consisting of a pump head, which forms a single part with a suction nozzle, a discharge nozzle, a spoke, and a bearing support, in which a counter bearing is mounted, in which a first region of a shaft is supported, around which a pump impeller is rotatably mounted via a slide bearing secured in the pump impeller, the spoke retaining the bearing support in a central position within the pump head and having a containment shell, which separates a wet chamber from a dry chamber and in which a second region of the shaft is supported. The invention seeks to solve the problem of providing in a generic centrifugal pump.

A fluid pump assembly is provided. The pump has a pair of units magnetically coupled to each other. The first unit contains a drive motor and a magnetic assembly. The second unit contains a magnetic assembly and a blade of a propeller/impeller for imparting movement to a fluid. As the first unit is activated by the drive motor, a magnetic flux is created which in turn rotates the magnetic assembly in the second unit, driving the blade.

A pump bearing retainer (1), for a wet-running pump, includes a radially inner section (3) including an inner section surface (9) for a press-fit contact with an essentially cylinder-shaped radial outer surface (29) of a pump bearing (13). A radially outer section (7) includes an annular or essentially conical-shaped outer section surface (17) with a cone angle (.sub.1) equal to or larger than 45. An intermediate section (5) extends from the inner section (3) to the outer section (7). The intermediate section (5) includes an essentially conical-shaped intermediate section surface (15) with a cone angle (.sub.2) smaller than 45. A longitudinal cross-section area (A) of the inner section (3) is smaller than a longitudinal cross-section area (B) of the intermediate section (5).