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| Number | Title | Issue Date |
| 7419354 | Centrifugal pump with screw pump accelerator Method and apparatus for pumping drilling fluid (mud) containing drill cuttings, comprising a centrifugal pump with screw pump accelerator. The screw pump creating positive pressure for centrifugal pump inlet to increase performance. The screw pump mud level fluctua... | 09/02/2008 |
| 7363830 | Discrete volume sampling device using a vacuum A discrete volume vacuum sampling device is provided with a vacuum tube, a sample tube, and a sample container. The container defines a discrete volume of product to be sampled from a product bed within a processing machine. The sampler tube extends between the cont... | 04/29/2008 |
| 7305827 | Inlet duct for rearward-facing compressor wheel, and turbocharger incorporating same A turbocharger includes a compressor wheel having back-to-back impellers (i.e., a forward-facing impeller and a rearward-facing impeller) mounted on the same shaft. The two impellers are independently supplied with inlet air via separate inlet ducts and discharge pr... | 12/11/2007 |
| 7247001 | Impeller An impeller (1) according to the present invention has a disk-like main plate (10), a blade (20) joined to the main plate, and a side plate (30) having a suction port. A boss hole (12) is formed in a central portion of the main pla... | 07/24/2007 |
| 7241104 | Two phase flow conditioner for pumping gassy well fluid A centrifugal pump pumps well fluid with a high gaseous content by conditioning the well fluid with a conditioning impeller and conditioning diffuser design for use with gaseous well fluid. The conditioning impellers have vanes that are curved with a leading edge th... | 07/10/2007 |
| 7214031 | Apparatus and method for processing fluids An apparatus and a method for a versatile, multi-stage, centrifugal fluids-processing device adaptable to efficiently mixing, blending, emulsifying, deagglomerating or homogenizing fluids. The device comprises a centrifugal-pump-type mechanism comprising an electric... | 05/08/2007 |
| 7096712 | Material testing system for turbines The wear resistance of impellers used in multi-stage turbine pumps is tested by using a multi-stage turbine pump having impellers with different physical properties to pump a fluid containing small amounts of an abrasive material. After the fluid has been pumped for... | 08/29/2006 |
| 6923621 | Diffuser for a turbo pump To suppress degradation of the pump efficiency while preventing the diffuser from stalling on a turbo pump Opening 48 is provided at a specified position in the cord length direction of vane 42 of diffuser 44. Opening 48 communicat... | 08/02/2005 |
| 6913444 | Thin-form centrifugal fan A small, lightweight and inexpensive thin-form centrifugal fan having a first moving blade; a second moving blade; and a stationary blade disposed between the first moving blade and the second moving blade and directing gas taken in by rotation of the first moving b... | 07/05/2005 |
| 6634856 | Integrally formed stamped sheet-metal blades having 3D structure Integrally formed stamping sheet-metal blades having 3D structure for impeller or diffuser of a centrifugal pump or blower includes at least two integral forming blade or vane members. Each blade or vane member has a plurality of relatively short 3D blade... | 10/21/2003 |
| 6481961 | Stage for a centrifugal submersible pump A stage for a centrifugal submersible pump has a base, a connecting plate and an impeller. The base has multiple ribs integrally formed in the base. The connecting plate is securely attached to one end of the base. The connecting plate has an annular core... | 11/19/2002 |
| 6446457 | Fan and tunnel with fans A intended in particular for equipping a tunnel for refrigeration of products such as food products, wherein this tunnel has a gaseous current flowing through it. The fan includes at least one pair of funnels (1) fixed onto one face of a support (2) mount... | 09/10/2002 |
| 6409468 | Turbo-molecular pump A compact turbo-molecular pump has a relatively short axial length and yet provides sufficient evacuation and compression capabilities. The turbo-molecular pump comprises a casing (10) which contains an exhaust vane section (L1) having rotary vanes (30) o... | 06/25/2002 |
| 6162015 | Centrifugal type fluid machine A highly efficient centrifugal type fluid machine is configured so that the vane outlet angle or the vane outlet diameter at a side plate end (4a) of a single stage or a plurality of stages of a diffuser (D) is made larger than the vane outlet angle or th... | 12/19/2000 |
| 6106224 | Downthrust pads for submersible centrifugal pumps A submersible centrifugal pump is claimed which includes an inner downthrust washer for receiving the downthrust load from the upward movement of the produced fluid, and an outer sealing washer, which is a non-load bearing washer, for allowing the reposit... | 08/22/2000 |
| 6012900 | Submergible pumping system with thermal sprayed polymeric wear surfaces In a pumping system, a PEEK composite material may be applied to wear areas on internal components. Typically, the internal component provides a metallic substrate which is prepared with a metallic bonding layer arc sprayed onto its surface, at least at t... | 01/11/2000 |
| 5595473 | Centrifugal fluid machine At a vaned diffuser or a volute casing of a centrifugal fluid machine, pressure pulsation and vibrating forces acting upon the diffuser or the volute casing are mitigated or cancelled so as to abate the noise from the centrifugal fluid machine. The fluid ... | 01/21/1997 |
| 5562405 | Multistage axial flow pumps and compressors A multistage axial flow pump or compressor comprises at least one stage (10) including a rotor (16) and a stator (20). The rotor (16) is arranged to impart whirl in one direction, while the stator (20) is arranged to impart whirl in the opposite direction... | 10/08/1996 |
| 5385445 | Centrifugal pump A multi-stage open impeller centrifugal pump, primarily used for charging service. The pump uses multivane, 27 vanes, impellers, mounted on a single shaft. Rotor parts are a loose fit to the pump shaft and channel rings are pulled together with bolts. Jac... | 01/31/1995 |
| 5383764 | Diffusor pump having diffusor blades The present invention provides a novel diffusor for a diffusor pump. The diffusor comprises a body having a side portion and a plurality of blades placed on the side portion of the body so as to be along a flow direction of a liquid, each of the plural bl... | 01/24/1995 |
| 5344285 | Centrifugal pump with monolithic diffuser and return vane channel ring member A segmental ring centrifugal pump wherein the channel ring and the diffuser/crossover hydraulics are formed as a single monolithic casting. By casting the diffuser and the channel ring as a unit, the monolithic diffuser channel ring member and the diffuse... | 09/06/1994 |
| 5330318 | Centrifugal pump with an improved axial diffusor The invention provides a centrifugal pump having an axial diffusor with plural blades having such a specific incident angle as to prevent appearance of revolving and stall of a treating liquid. An incident angle of the blades of the axial diffusor is sele... | 07/19/1994 |
| 5286164 | Radial blower with blower wheel rotating in spiral housing A radial blower for producing an air stream which is supplied as a secondary air to a waste gas stream of an internal combustion engine has a spiral housing having a substantially tangentially oriented blower output and accommodating a blower wheel which ... | 02/15/1994 |
| 4938661 | Multistage centrifugal compressor A multistage centrifugal compressor has a shaft rotatable on an axis and a plurality of centrifugal impellers fixed on the shaft and having outlets at outer peripheries thereof. Conduits connect the impellers to from a path for fluid undergoing multi-stag... | 07/03/1990 |
| 4865519 | Oil submersible pump A multi-stage centrifugal pump mainly used for oil extraction, which incls two essential components, namely, a rotational impeller comprising several blades and a stationary diffuser. The shapes of blades and flow passages are designed by using three-dim... | 09/12/1989 |
| 4859144 | Fan stage configuration The invention comprehends an inter or after stage of a fan system in which the stage has curvilinear spiralling guidance blades and integral blade tips angled in an axial direction to provide guidance for air flow to the spiralling guidance blades.... | 08/22/1989 |
| 4802819 | Centrifugal pump A multistage centrifugal pump, incorporates a first housing (14) having a cylindrical wall (30) defining a portion of the outer surface of the pump. A first diffuser (15) is fixed to the first housing (14) and has a discharge opening (43). A first impelle... | 02/07/1989 |
| 4564334 | Guide wheel for multistage centrifugal pumps The follow-up guide wheels of a multistage centrifugal pump define flow paths whose cross-sectional area increases exclusively in the axial direction of the respective stages, or axially and radially inwardly, to thus allow for a reduction of the outer di... | 01/14/1986 |
| 4293288 | Submersible pump housing A housing of a single material of construction for a submersible pump adapted to integrally contain the usual diffuser stack and a mounting bracket for the pump motor. The housing is provided upwardly of the lower end thereof with a multiplicity of circum... | 10/06/1981 |
| 4135852 | Centrifugal slurry pump and method A multiple stage centrifugal pump for the handling of slurries. At each stage the slurry enters and is centrifugally discharged from an unobstructed chamber in which a vortex is created by an impeller disposed in a cavity located above the chamber. The va... | 01/23/1979 |
| 3975113 | Centrifugal pump A rotary centrifugal pump having an axial inlet and discharge in a casing together with an impeller having liquid impelling vanes on both surfaces thereof with the impeller having central openings enabling inlet liquid to be impelled by vanes on both surf... | 08/17/1976 |
| 3963370 | Laundry machine blower mechanism A combinaton washer-dryer laundry machine having a washing, extraction and drying operations. There is included in the machine a rotatable drum for tumbling the clothes, a liquid pump for removing liquid from the machine, a vacuum blower for extracting li... | 06/15/1976 |
