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| Number | Title | Issue Date |
| 8162600 | System, method and apparatus for two-phase homogenizing stage for centrifugal pump assembly A two-phase, homogenizing or mixing stage for a centrifugal pump assembly homogenizes the fluids being circulated therethrough. The mixing stage produces high shut-in head pressure and a very high maximum flow rate. The mixing stage has a diffuser with fixed diffuse... | 04/24/2012 |
| 8075260 | Centrifugal turbomachinery A centrifugal turbomachinery in accordance with the present invention can lower a fluid loss in a return flow path. In the centrifugal turbomachinery, a plurality of centrifugal impellers is attached to a rotating shaft, and the centrifugal turbomachinery is provide... | 12/13/2011 |
| 8066477 | Staged centrifugal pump apparatus for pumping a viscous fluid A pump apparatus comprising a series of stacked impellers rotating about a common axis, for pumping a viscous fluid mixture upwardly from an underground location. The pump apparatus comprises a generally cylindrical housing having an intake at or near its suction en... | 11/29/2011 |
| 7905703 | Centrifugal compressor return passages using splitter vanes A return section in a multistage centrifugal compressor includes a plurality of circumferentially positioned flow vanes, and a plurality of splitter vanes disposed between the flow vanes. The splitter vanes serve to minimize or eliminate regions of reverse or separa... | 03/15/2011 |
| 7866944 | Compact low noise efficient blower for CPAP devices A blower for providing a supply of air at positive pressure in the range of approximately 2 cm H2O to 30 cm H2O includes a motor, at least one impeller, and a stationary component. The stationary component includes an inlet and an outlet. The m... | 01/11/2011 |
| 7766613 | Pump and liquid supply system A pump includes a pump unit, a pump case, a motor unit, a plurality of guide blades forming plural guide paths in tangent directions of the impellers; and a multiplicity of return blades to form paths for collecting the liquid under pressure from the guide paths int... | 08/03/2010 |
| 7390163 | Radial flow turbine A multi-stage radial flow compressor and turbine includes a rotor having a first plurality of blades and a second plurality of blades radially outward from the first plurality. A stator has a plurality of blades radially positioned between the two sets of rotor blad... | 06/24/2008 |
| 7326034 | Pump apparatus and methods of making and using same Pump apparatus and methods of making and using same are disclosed. One inventive apparatus includes at least two pump stages having different performance characteristics combined in series to substantially match an intended pumping application. An inventive method i... | 02/05/2008 |
| 7290984 | Multistage pump A centrifugal pump includes plural pump stages, each comprising an impeller assembly, a stationary disc assembly and a diffuser assembly, all disposed about an impeller shaft. A floating impeller hub seal is supported by a diffuser assembly to minimize fluid recircu... | 11/06/2007 |
| 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 |
| 7179050 | Radial fan The invention relates to a radial fan with a casing and in it an axially placed wheel, wherein the casing has an axially placed air inlet, an exhaust (5), a bottom section (6) with a bottom reference surface (7) arranged orthogonally to the axis... | 02/20/2007 |
| 7150600 | Downhole turbomachines for handling two-phase flow Disclosed is a submersible pump assembly for handling two-phase flow. The pump assembly preferably includes a housing and a first stage. The first stage includes an impeller assembly and a diffuser assembly, which are collectively configured to produce a diagonal fl... | 12/19/2006 |
| 7150152 | Vibration limiter for coaxial shafts and compound turbocharger using same A compound turbocharger is provided, including at least one housing. A first turbocharger having an outer shaft is disposed within the housing, and a second turbocharger is provided having an inner shaft co-axial with and extending within the outer shaft. At least o... | 12/19/2006 |
| 7144226 | Centrifugal compressor having a flexible coupling This compressor unit comprises a motor (34) and at least one compressor (44) comprising a driven shaft (54) driven by the rotor of the motor and bladed wheels fitted on the driven shaft (54), the assembly composed of the motor and the com... | 12/05/2006 |
| 7001140 | Centrifugal fan diffuser At least one embodiment of the present inventive technology focuses on a vaneless diffuser adapted for establishment extra-radially of a centrifugal fan, wherein the diffuser may effect an optimal transformation of velocity pressure into static pressure of a fluid (... | 02/21/2006 |
| 6979174 | Stage pump having composite components A system and method is provided for pumping fluid. A pump incorporates composite components that provide a high degree of formability while maintaining wear resistance for use in potentially abrasive environments. The composite components may comprise one or more im... | 12/27/2005 |
| 6974304 | Centrifugal compressor for high pressure with improved efficiency A centrifugal compressor for high pressure (10) with improved efficiency, of the type comprising a rotor (12), an inner case (14), diffusers (16) and diaphragms (18), wherein the surfaces which are subjected to passage of the flow ... | 12/13/2005 |
| 6971848 | Multistage pump and method of making same A system and method is provided for constructing an elongated pump. The pump has multiple stages within an outer housing. Each stage comprises an impeller and a diffuser. The diffusers are divided into separate groups that are compressed during construction of the p... | 12/06/2005 |
| 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 |
| 6884031 | Pump assembly A pump assembly particularly for use in high pressure operations is disclosed, which pump assembly is a barrel casing cartridge pump assembly which includes a pump cartridge having a plurality of impeller stages, and a barrel body casing which encases a portion of t... | 04/26/2005 |
| 6834501 | Turbocharger compressor with non-axisymmetric deswirl vanes A compressor includes first-stage and second-stage impellers arranged back-to-back such that fluid is discharged from the first-stage impeller into a generally annular interstage duct that conducts the fluid into the second-stage impeller and the fluid discharged fr... | 12/28/2004 |
| 6726449 | Pump diffuser anti-spin device In a downhole centrifugal pump, diffusers are stacked one on top of each other inside of tubular pump housing without contacting the pump drive shaft or impellers. A first compressive device applies a pre-compressive force to a stack of diffusers to prevent the diff... | 04/27/2004 |
| 6715987 | Stator blading of return channels for two-dimensional centrifugal stages of a multi-stage centrifugal compressor with improved efficiency Stator blading (10) of return channels for two-dimensional centrifugal stages of a multi-stage centrifugal compressor with improved efficiency, of the type comprising a plurality of blades (20) disposed circumferentially equally spaced on a ring (12... | 04/06/2004 |
| 6589013 | Fluid flow controller A fluid flow controller and method of operation thereof are presented. The fluid flow controller may include a casing having a casing blade. The fluid flow controller may also include a rotor having a first rotor blade and a second rotor blade radially sp... | 07/08/2003 |
| 6568904 | Fluidal machine In a fluidal machine with an impeller rotating to urge a fluid radially outwardly by a centrifugal force, a vane guiding the fluid discharged from the impeller, a vane member which includes a front end of the vane facing to the impeller so that the fluid ... | 05/27/2003 |
| 6508621 | Enhanced performance air moving assembly The air moving assembly includes at least one air moving device and a stator, said stator being operable to at least reduce one expansion and/or one contraction for airflow passing through the assembly. The stator is also preferably operable to impart or ... | 01/21/2003 |
| 6488469 | Mixed flow and centrifugal compressor for gas turbine engine A two stage compressor for a gas turbine engine with a mixed flow first stage, a centrifugal second stage, and an intermediate duct. The mixed flow stage has a mixed rotor rotatable about the central compressor axis with a circumferential array of mixed f... | 12/03/2002 |
| 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 |
| 6439835 | Pump shell for multistage metal working pump An improved pump shell for a multistage metal working pump includes a plurality of pump shell units housed in series within a hollow cylindrical casing and has the impellers driven by a shaft. Each pump shell unit has a inner shell which forms a holding e... | 08/27/2002 |
| 6425737 | Turbine A turbine comprises a housing having an inlet and an outlet, a stator mounted in the housing and including an arcuate stator blade projecting radially inward, and a turbine rotor having a central annular jet path accommodating therein said arcuate stator ... | 07/30/2002 |
| 6406277 | Centrifugal pump with inducer intake An electrical submersible well pump assembly has an inducer and diffuser for applying a positive pressure to the first pump stage. The pump assembly includes a centrifugal pump with a housing having a well fluid inlet and a number of pump stages. Each pum... | 06/18/2002 |
| 6398493 | Floatable impeller for multistage metal working pump A floatable impeller for multistage metal working pump includes an impeller hub which has an impeller metal working member supporting a rear wall of the impeller and an impeller plastic member integrally formed with the impeller working member. The impell... | 06/04/2002 |
| 6368056 | Stage in a submerged multiple-stage pump A multistage oil-well pump for pumping out formation fluid has a higher pressure head at low delivery rates and higher stability of performance when gas pockets are present in the medium being transferred. To this end, in the stage of a multistage submers... | 04/09/2002 |
| 6361272 | Centrifugal submersible pump A submersible centrifugal pump for downhole pumping of methane-saturated water from wells drilled in coal formations, has an electric motor-driven vertical shaft having centrifugal impellers distributed therealong, each impeller being located in a station... | 03/26/2002 |
| 6345503 | Multi-stage compressor in a turbocharger and method of configuring same A method of configuring a compressor in a turbocharger for use in an internal combustion engine is provided with the steps of: providing a multi-stage compressor including a first compressor wheel carried by a shaft, an axially extending first inlet and a... | 02/12/2002 |
| 6343913 | Hydraulic turbomachine There is provided a hydraulic turbomachine comprising a housing, one or more impellers arranged rotatably around an axis within the housing, one or more resin-made diffusers provided around the one or more impellers for defining diffuser channels around t... | 02/05/2002 |
| 6340287 | Multistage centrifugal compressor impeller for multistage centrifugal compressor and method for producing the same By changing a vane height to produce different vanes from master vanes, different impellers are produced, and therefore there can be obtained an inexpensive and high-reliability multistage centrifugal compressor and an impellers therefor. An impeller for ... | 01/22/2002 |
| 6227802 | Multistage centrifugal pump The invention concerns a fluid pumping apparatus including a pump unit having an inlet housing, a plurality of pumping stages, and a discharge housing, surrounded by a continuous layer of waterproof material. The waterproof layer is further surrounded by ... | 05/08/2001 |
| 6203275 | Centrifugal compressor and diffuser for centrifugal compressor In a multi-stage centrifugal compressor, having a plurality of impellers mounted on a rotation shaft, or a single-stage centrifugal compressor, a vaned diffuser, having a plurality of vanes, is mounted at a downstream side of the impeller, and a vaneless ... | 03/20/2001 |
