Patents by Inventor Bernhard Brecht
Bernhard Brecht has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8870521Abstract: A centrifugal pump for delivering hot fluids, having a contacting shaft seal, a seal housing (13) for the shaft seal (14), and a return line (8) for a partial flow of the delivered fluid, in which no delivered fluid is discharged out of the seal housing (13); a separate housing cover (9) is disposed between the seal housing (13) and the pump housing (1); there is a contact surface which minimizes heat transfer between the seal housing (13) and the housing cover (9); and the return line (8) is connected to the housing cover (9) and/or to the pump housing (1).Type: GrantFiled: December 2, 2011Date of Patent: October 28, 2014Assignee: KSB AktiengesellschaftInventors: Bernhard Brecht, Uwe Bruhns, Frank Sehr
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Patent number: 8657591Abstract: An engine pump assembly (1), particularly a main coolant pump, composed of a housing (4) of a rotary pump with delivery elements arranged therein, a heat barrier part (6), a motor part (5) which drives the delivery elements, and force transmitting connecting elements (7) between a housing flange (8) of the housing (4) of the rotary pump and a flange (21) of the engine part (5). For faster and more reliable assembly and disassembly, the housing flange (8) is provided with receptacles (12) over at least half of its periphery for the arrangement of screw heads (13, 15) of the connecting elements (7), which screw heads (13, 15) are held in a bayonet-like manner in the receptacles (12).Type: GrantFiled: March 19, 2010Date of Patent: February 25, 2014Assignee: KSB AktiengesellschaftInventors: Harald Hartmann, Uwe Bruhns, Ralf Graber, Bernhard Brecht, Juergen Kaufmann
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Publication number: 20120076643Abstract: A centrifugal pump for delivering hot fluids, having a contacting shaft seal, a seal housing (13) for the shaft seal (14), and a return line (8) for a partial flow of the delivered fluid, in which no delivered fluid is discharged out of the seal housing (13); a separate housing cover (9) is disposed between the seal housing (13) and the pump housing (1); there is a contact surface which minimizes heat transfer between the seal housing (13) and the housing cover (9);, and the return line (8) is connected to the housing cover (9) and/or to the pump housing (1).Type: ApplicationFiled: December 2, 2011Publication date: March 29, 2012Applicant: KSB AktiengesellschaftInventors: Bernhard BRECHT, Uwe Bruhns, Frank Sehr
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Patent number: 8079833Abstract: An electric motor (1) having a coaxially associated pump (6) for a coolant circuit, in particular in a system with temperature transfer and/or heat transfer, in which a shaft assembly (5) transmits a torque from the electric motor (1) to at least one impeller (8) arranged in the pump housing (7) within housing parts (7, 10) in the form of a hermetically sealed pressure enclosure, and a flywheel (12) is arranged between the electric motor (1) and the pump housing (7). All of the rotating parts are arranged within a hermetically sealed motor/pump unit, and the motor/pump unit is filled with fluid. The flywheel (12) comprises a flywheel body (13) made from a high-strength material having a large number of cavities (16, 17) with inserts (16, 17) formed of or containing a heavy metal having a density greater than 11.0 kg/dm3arranged in the cavities.Type: GrantFiled: July 26, 2006Date of Patent: December 20, 2011Assignee: KSB AktiengesellschaftInventors: Bernhard Brecht, Ralf Graber, Uwe Bruhns, Harald Hartmann
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Publication number: 20100221127Abstract: An engine pump assembly (1), particularly a main coolant pump, composed of a housing (4) of a rotary pump with delivery means arranged therein, a heat barrier part (6), a motor part (5) which drives the delivery means, and force transmitting connecting elements (7) between a housing flange (8) of the housing (4) of the rotary pump and a flange (21) of the engine part (5). For faster and more reliable assembly and disassembly, the housing flange (8) is provided with receptacles (12) over at least half of its periphery for the arrangement of screw heads (13, 15) of the connecting elements (7), which screw heads (13, 15) are held in a bayonet-like manner in the receptacles (12).Type: ApplicationFiled: March 19, 2010Publication date: September 2, 2010Applicant: KSB AktiengesellschaftInventors: Harald HARTMANN, Uwe BRUHNS, Ralf GRABER, Bernhard BRECHT, Juergen KAUFMANN
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Patent number: 7600535Abstract: A valve for switching over liquid paths, particularly for pressure exchanger installations with tubular pressure exchanger chambers (3) through which an alternating flow occurs, in which a rotatable control element (10, 10.1) having a plurality of flow paths is mounted in a housing (11), which in turn comprises a plurality of connection opening (12, 16, 17, 46) connected to a first pipe system and to an end of at least one pressure exchanger. Another end of the pressure exchanger is connected to a second pipe system through a valve. A motorized drive shaft (50) rotates the control element so as to alternately connect the control element flow paths to openings inside housing (11). Oncoming flow to the control element may come from an axial direction or from a radial direction, and outgoing flow from the control element occurs in the axial direction.Type: GrantFiled: September 12, 2005Date of Patent: October 13, 2009Assignee: KSB AktiengesellschaftInventors: Sven Baumgarten, Stephan Bross, Bernhard Brecht, Uwe Bruhns, Stefan Flak, Christoph Jaeger, Wolfgang Kochanowski, Wiltrud Knoebl, Mogens Ellegaard
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Patent number: 7377744Abstract: A multistage centrifugal pump in which each stage includes a one-piece or multi-piece housing and an impeller disposed therein. The pump stages are arranged between an inlet end member and an outlet end member and retained therebetween by connectors so as to be connected to a flow-guiding system. All impellers are positioned on a single pump shaft that is supported by at least two pump bearings. One end of the pump shaft is provided with a device for receiving a connector of a drive unit, and outer support members are disposed at mounting points adjacent the end members in order to mount the centrifugal pump in its installation location. The pump shaft (3) is supported by two two pump bearings (11, 12), with the maximum distance (LL) between confronting sides of the two pump bearings (11, 12) being less than or equal to a minimum structural stage height (LM) multiplied by the number of pump stages (2.1-2.5) minus 1.Type: GrantFiled: November 17, 2005Date of Patent: May 27, 2008Assignee: KSB AktiengesellschaftInventors: Joerg Urban, Wolfgang Kochanowski, Bernhard Brecht, Stephan Scharpf
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Publication number: 20070025865Abstract: An electric motor (1) having a coaxially associated pump (6) for a coolant circuit, in particular in a system with temperature transfer and/or heat transfer, in which a shaft assembly (5) transmits a torque from the electric motor (1) to at least one impeller (8) arranged in the pump housing (7) within housing parts (7, 10) in the form of a hermetically sealed pressure enclosure, and a flywheel (12) is arranged between the electric motor (1) and the pump housing (7). All of the rotating parts are arranged within a hermetically sealed motor/pump unit, and the motor/pump unit is filled with fluid. The flywheel (12) comprises a flywheel body (13) made from a high-strength material having a large number of cavities (16, 17) with inserts (16, 17) formed of or containing a heavy metal having a density greater than 11.0 kg/dm3 arranged in the cavities.Type: ApplicationFiled: July 26, 2006Publication date: February 1, 2007Applicant: KSB AktiengesellschaftInventors: Bernhard Brecht, Ralf Graber, Uwe Bruhns, Harald Hartmann
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Patent number: 7152620Abstract: A valve for switching fluid paths, particularly for pressure exchanger installations with tubular chambers through which fluid flows in an alternating manner, including a rotatable closing element (12, 13) provided with a motorized drive shaft (14) and arranged inside a housing (2) having a plurality of connections (3, 4) for connecting lines leading to a pipe system and to a respective end of at least one pressure exchanger. Another end of each pressure exchanger is connected through a valve arrangement to a second pipe system. A splitter (7) provided with a plurality of overflow paths (17, 18, 27) is arranged inside the housing (2); mouths of the overflow paths are located on two axial end faces (10, 11) and on the circumference of the splitter (7), and a rotatable, disk-shaped control element (12, 13) is arranged in a sealing manner at each end face of the splitter (7).Type: GrantFiled: September 12, 2005Date of Patent: December 26, 2006Assignee: KSB AktiengesellschaftInventors: Sven Baumgarten, Stephen Bross, Bernhard Brecht, Uwe Bruhns, Mogens Ellegaard, Stefan Flak, Christoph Jaeger, Wolfgang Kochanowski, Wiltrud Knoebl
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Publication number: 20060127232Abstract: A multistage centrifugal pump in which each stage includes a one-piece or multi-piece housing and an impeller disposed therein. The pump stages are arranged between an inlet end member and an outlet end member and retained therebetween by connectors so as to be connected to a flow-guiding system. All impellers are positioned on a single pump shaft that is supported by at least two pump bearings. One end of the pump shaft is provided with a device for receiving a connector of a drive unit, and outer support members are disposed at mounting points adjacent the end members in order to mount the centrifugal pump in its installation location. The pump shaft (3) is supported by two two pump bearings (11, 12), with the maximum distance (LL) between confronting sides of the two pump bearings (11, 12) being less than or equal to a minimum structural stage height (LM) multiplied by the number of pump stages (2.1-2.5) minus 1.Type: ApplicationFiled: November 17, 2005Publication date: June 15, 2006Applicant: KSB AktiengesellschaftInventors: Joerg Urban, Wolfgang Kochanowski, Bernhard Brecht, Stephan Scharpf
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Publication number: 20060060245Abstract: A valve for switching fluid paths, particularly for pressure exchanger installations with tubular chambers through which fluid flows in an alternating manner, including a rotatable closing element (12, 13) provided with a motorized drive shaft (14) and arranged inside a housing (2) having a plurality of connections (3, 4) for connecting lines leading to a pipe system and to a respective end of at least one pressure exchanger. Another end of each pressure exchanger is connected through a valve arrangement to a second pipe system. A splitter (7) provided with a plurality of overflow paths (17, 18, 27) is arranged inside the housing (2); mouths of the overflow paths are located on two axial end faces (10, 11) and on the circumference of the splitter (7), and a rotatable, disk-shaped control element (12, 13) is arranged in a sealing manner at each end face of the splitter (7).Type: ApplicationFiled: September 12, 2005Publication date: March 23, 2006Applicant: KSB AKTIENGESELLSCHAFTInventors: Sven Baumgarten, Stephan Bross, Bernhard Brecht, Uwe Bruhns, Mogens Ellegaard, Stefan Flak, Christoph Jaeger, Wolfgang Kochanowski, Wiltrud Knoebl
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Publication number: 20060054223Abstract: A valve for switching over liquid paths, particularly for pressure exchanger installations with tubular pressure exchanger chambers (3) through which an alternating flow occurs, in which a rotatable control element (10, 10.1) having a plurality of flow paths is mounted in a housing (11), which in turn comprises a plurality of connection opening (12, 16, 17, 46) connected to a first pipe system and to an end of at least one pressure exchanger. Another end of the pressure exchanger is connected to a second pipe system through a valve. A motorized drive shaft (50) rotates the control element so as to alternately connect the control element flow paths to openings inside housing (11). Oncoming flow to the control element may come from an axial direction or from a radial direction, and outgoing flow from the control element occurs in the axial direction.Type: ApplicationFiled: September 12, 2005Publication date: March 16, 2006Applicant: KSB AKTIENGESELLSCHAFTInventors: Sven Baumgarten, Stephan Bross, Bernhard Brecht, Uwe Bruhns, Stefan Flak, Christoph Jaeger, Wolfgang Kochanowski, Wiltrud Knoebl, Mogens Ellegaard
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Patent number: 6568901Abstract: A balancing arrangement which is used to relieve or take up axial thrust in a multistage centrifugal pump, having a balancing device with at least one axial gap (8) and at least one radial gap (6,7) and in which a balancing flow is conducted through the gaps, and having an axial bearing which receives remaining axial thrust. Associated with the axial bearing is a cardanic ring (10) which serves to offset alignment errors. Highly reliable operation with only low leakage losses is achieved by configuring the balancing device such that a residual thrust in the direction of the suction side of the pump exists in all operating conditons and the cardanic ring is designed such that it is elastically deformed by the residual thrust and has a spring constant such that the axial gap (s) will close from a maximum width position when the pump is at rest to a minimum width position during operation while still avoiding contact between the surfaces which define the axial gap.Type: GrantFiled: December 14, 2001Date of Patent: May 27, 2003Assignee: KSB AktiengesellschaftInventors: Bao Wang, Bernhard Brecht, Juergen Schill
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Publication number: 20020125649Abstract: A seal which is arranged between a shaft and a casing opening and separates, from one another, two spaces at different pressures, with the exception of a residual annular gap which permits a slight leakage caused by a gap flow. The seal can replace prior seal types and only permits a very small leakage volume flow while being relatively uncomplicated in terms of components, assembly and maintenance. The seal includes a bush (13) tightly surrounding the shaft (2), having at least one grooves (14) in each of which is arranged, with slight axial clearance, an elastic annular element (15, 18, 20, 21, 23) split by a longitudinally extending gap (16, 17, 19). The pressure difference between axial end surfaces of the annular element(s) (15, 18, 20, 21, 23) urges the annular element(s) (15, 18, 20, 21, 23) into sealing contact with the casing opening (3) in such a way that the gap flow is guided via the annular gap between the groove(s) (14) and the annular element(s) (15, 18, 20, 21, 23).Type: ApplicationFiled: December 13, 2001Publication date: September 12, 2002Inventors: Stephan Bross, Gerhard Schwarz, Bernhard Brecht, Ruediger Koepp
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Publication number: 20020114713Abstract: A balancing arrangement which is used to relieve or take up axial thrust in a multistage centrifugal pump, having a balancing device with at least one axial gap (8) and at least one radial gap (6,7) and in which a balancing flow is conducted through the gaps, and having an axial bearing which receives remaining axial thrust. Associated with the axial bearing is a cardanic ring (10) which serves to offset alignment errors. Highly reliable operation with only low leakage losses is achieved by configuring the balancing device such that a residual thrust in the direction of the suction side of the pump exists in all operating conditons and the cardanic ring is designed such that it is elastically deformed by the residual thrust and has a spring constant such that the axial gap (s) will close from a maximum width position when the pump is at rest to a minimum width position during operation while still avoiding contact between the surfaces which define the axial gap.Type: ApplicationFiled: December 14, 2001Publication date: August 22, 2002Inventors: Bao Wang, Bernhard Brecht, Juergen Schill