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| Number | Title | Issue Date |
| 8113772 | Damping device for a shaft of a turbomachine A hollow shaft of a turbomachine including a cylindrical wall with an inner surface portion and at one end a member for attachment to a rotor disk of the turbomachine is disclosed. The shaft also includes a damping device wherein at least one vibration-damping lamin... | 02/14/2012 |
| 8070426 | System, method and apparatus for open impeller and diffuser assembly for multi-stage submersible pump A multi-stage submersible pump uses impellers having only one shroud to provide stages with shorter stack lengths to allow more stages per housing and more head pressure per housing. The impellers are biased with wave springs to keep the rotating impeller vanes clos... | 12/06/2011 |
| 7997858 | Arrangement for sealing off a gap between a first component and a second component The invention relates to a device for sealing the space between first and second components, wherein a sealing element is placed between the sealing surface of the first component and the sealing surface of the second component, means are used for displacing the sea... | 08/16/2011 |
| 7883315 | Seal assembly for a fan rotor of a tip turbine engine A seal assembly (118) mounted within a nonrotatable static inner support structure (16) for engagement with an axial seal face surface (114) and a radial seal face surface (116). The radial seal (120) engages the axial seal face su... | 02/08/2011 |
| 7544042 | Insert with sleeve for a molded impeller An impeller assembly includes a molded impeller and an insert within the impeller. The insert includes an unthreaded sleeve and a shoulder adjacent the sleeve for locating the impeller and the insert during manufacturing and installation. Methods of manufacturing an... | 06/09/2009 |
| 7429160 | Flexible floating ring seal arrangement for rotodynamic pumps A floating ring seal arrangement for rotodynamic pumps comprises a flexible ring that is structured to fit within a circular channel formed by generally concentric grooves in the rotating and non-rotating elements of the pump, the ring further being sized to rest ag... | 09/30/2008 |
| 7220099 | Sealing arrangement for a rotor of a turbo machine A sealing arrangement for a rotor of a turbomachine includes a blade (2), a heat shield (3, 4) and a sealing element (5, 6) for sealing between the blade (2) and the heat shield (3, 4) when the blade (2), heat shield (3, ... | 05/22/2007 |
| 7189054 | Self-compensating clearance seal for centrifugal pumps A radial seal is provided for installation within a centrifugal pump of the type having an impeller, a pump casing having a suction inlet, a sealing ring groove formed in the pump casing, and means for supplying flushing water to the sealing ring groove. The radial ... | 03/13/2007 |
| 7174719 | Gas turbine engine with seal assembly A gas turbine engine includes an interstage seal assembly positioned in a plenum between the compressor section and turbine section. The seal assembly includes an annular seal member positioned in the plenum adjacent to the compressor section for restraining a fluid... | 02/13/2007 |
| 7108266 | Fan cooled seal seat A seal assembly including a rotatable seal head subassembly also includes a fan that rotates with the seal head assembly, with the fan drawing air through a pump housing for purposes of cooling. ... | 09/19/2006 |
| 7101148 | Device for use in a blower configuration A device for application in a fan configuration is configured, in particular, to be directly driven by an electric motor. In the fan configuration, a centrifugal fan wheel is mounted to rotate in unison with a drive shaft. The centrifugal fan wheel, for producing a ... | 09/05/2006 |
| 7001159 | Motor-driven pump for pool or spa An improved motor-driven pump is provided for delivering a flow of water in a swimming pool or spa environment or the like. The improved pump includes a motor mounted within a motor housing having a seal plate mounted at one end thereof. The seal plate carries a sha... | 02/21/2006 |
| 6976681 | Slide ring seal assembly including a radial, rotation preventing arrangement A slide ring seal assembly includes a slide ring having an axially extending annular leg. The leg has radially outer and radially inner circumferential surfaces and a free axial end. A plurality of circumferentially spaced recesses are provided in leg at the free ax... | 12/20/2005 |
| 6932567 | Method and apparatus for controlling fluid leakage through gas turbine engines A method for controlling fluid leakage between a first pressure region and a second pressure region within a gas turbine engine using a first sealing member and a second sealing member. The first sealing member is movably coupled to a portion of the gas turbine engi... | 08/23/2005 |
| 6837677 | Impeller sealing arrangement A seal arrangement for an impeller assembly, the impeller assembly including an impeller housing (34) adapted to receive a drive shaft. An impeller (10) is located within the impeller housing (34) and is adapted for connection to the drive shaft... | 01/04/2005 |
| 6808179 | Turbomachinery seal A turbomachinery seal (20) attached to annular member (30) which surrounds and rotatably engages a shaft (34). The seal is capable of sealing pressure differentials between a high pressure region (24) and a low pressure region (26)... | 10/26/2004 |
| 6739833 | Compressor with built-in motor, and mobile structure using the same A compressor in which an electric motor and a compressing mechanism are accommodated in a case, a main shaft and an auxiliary shaft of a rotating shaft of the motor are supported by a radial plain bearing and a rolling bearing with a predetermined clearance given to... | 05/25/2004 |
| 6739829 | Self-compensating clearance seal for centrifugal pumps A seal for use in a centrifugal pump of the type used for pumping an abrasive slurry, and having a sealing ring groove formed in the pump casing and an arrangement for supplying flushing water, comprising a radial seal having a sealing end, a water receiving end, an... | 05/25/2004 |
| 6685428 | Integrated boot, seal and impeller system An integrated boot, seal and impeller system is adapted for being driven by a pump shaft. The system includes an impeller unit having a plurality of radially extending blades, a hub portion, a recess in the hub portion and a tubular portion extending from... | 02/03/2004 |
| 6676369 | Aspirating face seal with axially extending seal teeth A gas turbine engine aspirating face seal includes a rotatable engine member and a non-rotatable engine member and a leakage path therebetween. Annular generally planar rotatable and non-rotatable gas bearing face surfaces circumscribed about a centerline... | 01/13/2004 |
| 6622490 | Turbine power plant having an axially loaded floating brush seal An axially loaded floating brush seal useful in a stationary gas turbine engine having a first rotary compressor component having a rotor having a radial surface, a second non-rotary component having an end ending near the radial surface with the floating... | 09/23/2003 |
| 6533540 | Double-seal/oil-reservoir system for a motor/pump assembly A double-seal/oil-reservoir system for motor/pump assembly includes first seal (S1) and a second seal (S2) of a carbon/ceramic ring type that are axially spaced from one another along a drive shaft (24). A containment volume "V" is defined between the fir... | 03/18/2003 |
| 6328528 | Elastomeric pump impeller A water pump with a plurality of elastomeric blades on a rigid impeller is disclosed. The impeller has a tubular extension with a pair of flats on the outer diameter of the extension. The seal seat has a corresponding pair of flats on its inner diameter t... | 12/11/2001 |
| 6226975 | Turbine power plant having a floating brush seal A floating brush seal useful in a stationary gas turbine engine having a first rotary compressor component having a rotor having a land region, a second non-rotary component having an end extending over and around at least a portion of the land region wit... | 05/08/2001 |
| 6224322 | Seal assembly for centrifugal pumps with barrier ring In a centrifugal pump, a barrier ring in the form of a dynamic seal member is interposed between relatively rotating, generally circular wall portions which undergo relative axial movement to vary the width of a gap between the wall portions, the seal mem... | 05/01/2001 |
| 6123448 | Agitator for fixing and/or conveying aggressive liquids and/or liquids containing solids or fibers An agitator includes a drive motor having a shaft projecting through an axial end of a housing and having connected thereto a propeller boss. The propeller boss and housing define a circumferential gap spanned by a circumferentially extending radially out... | 09/26/2000 |
| 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 |
| 6068444 | Submergible centrifugal pump having improved diffuser bushings A submergible, centrifugal pump utilizes an improved bushing system for absorbing downthrust at each stage of the pump. The centrifugal pump is a multi-stage pump having a plurality of impellers keyed to a rotatable shaft. Diffusers cooperate with the imp... | 05/30/2000 |
| 6062815 | Unitized seal impeller thrust system A unitized seal impeller thrust system includes an impeller unit which includes a tubular neck portion that has flat surfaces on opposite sides of one another. The impeller unit includes a plurality of radially extending blades and a circular trough surro... | 05/16/2000 |
| 6042337 | Sealing system for a hydraulic machine A Kaplan turbine or similar hydraulic machine has a hub body (1) fixed to the turbine shaft with radial blades attached to the hub body. The blades are fitted with oil lubricated bearings in the hub body. A sealing arrangement for the oil system has first... | 03/28/2000 |
| 6019571 | Side channel compressor Side channel compressor, in which the gap (7) existing between the rotor (2) and the housing parts (1) surrounding the rotor (2) is sealed off using a sealing tape (8) introduced into a peripheral groove (9) provided in the corresponding wall regions of t... | 02/01/2000 |
| 5921748 | Centrifugal pump A centrifugal pump comprises an impeller (2a and 2b) which is rototable about an axis (X--X) inside a static volute (1). The pump is further provided with a sealing arrangement (11). The sealing arrangement (11) reduces or substantially eliminates the cle... | 07/13/1999 |
| 5873698 | Centrifugal pump An improved centrifugal pump is disclosed comprising a slip ring arranged around a central opening of a guidevane proximate the intake conduit shoulder of an impeller which is positioned, dimensioned and formed from a material sufficient to creat a lamell... | 02/23/1999 |
| 5846049 | Modular containment apparatus for adjusting axial position of an impeller in a magnetically coupled apparatus A pump is provided which includes an axially adjustable impeller in order to adjust the distance between the impeller and a housing section adjacent the impeller and thereby increase pump efficiency. The pump also can be made to have a removable module in... | 12/08/1998 |
| 5810553 | Pump provided with at least one rotary shaft In order to reduce the requirements for cleaning and provide a structure which is also easy to disassemble for cleaning without the use of tools, a pump, which has a rotary element such as an impeller shaft, is provided with a seal which is arranged so th... | 09/22/1998 |
| 5328328 | Sealing device between blade stages and a rotary drum, particularly for preventing leaks around the stages of straightener blades A device for ensuring the sealing in a rotary machine between a rotor and fixed blade stages. Blade edges are joined by rings carrying circular seals in slots. Springs force the seals in the longitudinal direction towards transverse faces of reinforcement... | 07/12/1994 |
| 5320482 | Method and apparatus for reducing axial thrust in centrifugal pumps A control stator comprising a plurality of stationary vanes, ribs, or cavities is provided in a centrifugal pump having a shrouded impeller. The function of the control stator is to slow the swirl of fluid in the cavity between the casing and the impeller... | 06/14/1994 |
| 5297928 | Centrifugal compressor A centrifugal compressor has a plurality of seals arranged at the back of an impeller for sealing the impeller outlet and form an annular space defined at the back of the impeller. The annular space is fed with a cold gas under a higher pressure than that... | 03/29/1994 |
| 5233824 | Turbine engine interstage seal A turbine engine includes adjacent compressor and turbine sections and an interstage seal assembly interposing therebetween in cooperation with a rotor assembly of the engine to inhibit leakage of pressurized air between the sections. The interstage seal ... | 08/10/1993 |
| 5209636 | Method and apparatus for setting clearance between fluid displacement housing and rotors A spacer of a desired thickness sets the clearance between an end face of a fluid displacement device rotor and an end plate of a fluid displacement device housing. Initially the spacer is located on either the end face or the end plate. The end face is t... | 05/11/1993 |
