Patents Assigned to Grundfos Management A/S
  • DEEP-WELL PUMP SYSTEM
    Publication number: 20130233533
    Abstract: A borehole pump system includes an immersion pump (20) and a riser (15) accommodated in the borehole (10). A water treatment system for cleaning pumped water is disposed in the riser.
    Type: Application
    Filed: December 4, 2010
    Publication date: September 12, 2013
    Applicant: GRUNDFOS MANAGEMENT A/S
    Inventor: Jørgen Bach
  • Can of a Drive Motor for a Pump Assembly
    Publication number: 20130221769
    Abstract: A can of a drive motor is provided for a pump assembly, wherein the can (22) is manufactured at least partly of plastic (52). At least in a part of the can (22) the plastic (52) is reinforced by individual fibers (32) distributed in the plastic (52). The fibers (32) in at least one layer (35) of the can (32) are aligned in a defined manner in the peripheral direction with respect to the longitudinal axis (Z) of the can (22). A method for manufacturing such a can is also provided.
    Type: Application
    Filed: April 17, 2013
    Publication date: August 29, 2013
    Applicant: GRUNDFOS MANAGEMENT A/S
    Inventor: GRUNDFOS MANAGEMENT A/S
  • CENTRIFUGAL PUMP
    Publication number: 20130216407
    Abstract: A centrifugal pump has at least one impeller, a pump housing and an electrical motor. The pump has a Q-H pump curve having a head H0 at zero flow and a head Href corresponding to the highest hydraulic power, and that Href is greater than H0. The pump has low energy consumption rate, especially at low flow corresponding to the conditions in which the pump is operated most of the time. Thus, the pump according to the invention is less energy consuming than the prior art centrifugal pumps.
    Type: Application
    Filed: July 11, 2011
    Publication date: August 22, 2013
    Applicant: GRUNDFOS MANAGEMENT A/S
    Inventors: Svend Rasmussen, Troels Jepsen, Pia Stenholt Laursen, Finn Jensen
  • Pump assembly as well as method for the modular construction of a pump assembly
    Patent number: 8485780
    Abstract: A pump assembly is provided with a pump (6) having one or more pump stages (10), wherein at least one of the components (12, 14) of the pump assembly, whose axial length depends on the number of pump stages (10). On at least one of its axial ends, the component has no connection configuration which is formed in the component (12, 14) itself and which is limited to the axial end. Instead, it is connected at this axial end with a friction fit and/or a positive fit to a connection element (20) which is coupled and/or connected to adjacent parts of the pump assembly, or is provided for coupling to adjacent parts of the pump assembly.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: July 16, 2013
    Assignee: Grundfos Management a/s
    Inventor: Per Frost Vedsted
  • DOSING PUMP ARRANGEMENT
    Publication number: 20130177462
    Abstract: A metering pump assembly includes a metering space (6) and a displacement body (8) which is linearly movable via a conrod (10). A helical spring (20) designed as a compression spring (20) impinges the conrod (10) with a force in a movement direction. The helical spring (20) at at least one axial end (24) is designed such that in a relaxed condition an end (26) of a spring wire projects axially with respect to a connecting winding (28).
    Type: Application
    Filed: July 6, 2011
    Publication date: July 11, 2013
    Applicant: GRUNDFOS MANAGEMENT A/S
    Inventors: Sergei Gerz, Klaus Müller, Bernd Rosner
  • Submersible pump
    Patent number: 8454330
    Abstract: A bore-hole pump has an electrical drive motor (3) and a multi-stage centrifugal pump (4) which is driven thereby. A sensor housing (9) is arranged at the end of the pump, in which one or more sensors are arranged, and which is surrounded by fluid and through which fluid flows (FIG. 1).
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: June 4, 2013
    Assignee: Grundfos Management a/s
    Inventor: Jan Lyngholm
  • Pump
    Patent number: 8403639
    Abstract: A pump, in particular a centrifugal pump, includes at least one flow-leading part with an at least regional surface layer (50) of an elastomer. The flow-leading part with the surface layer (50) is formed as a multi-component injection molded part, with a base structure (55) made of plastic as a first component, and with the elastomer as a second component.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: March 26, 2013
    Assignee: Grundfos Management a/s
    Inventors: Per Frost Vedsted, Oluf Eriksen
  • Method for the detection of errors in pump units
    Patent number: 8401806
    Abstract: A method is provided for detecting faults in a pump assembly having an electric motor, or faults in an electric motor, having at least one rotating shaft. A vibration signal is detected, the detected vibration signal is processed in a manner such that the influence of the current rotational speed of the shaft is eliminated, periodic signals are filtered out of the processed vibration signal, and the vibrational operating condition, in particular possible faults, is recognized by way of the periodic signals. Further, a pump assembly having an electric motor or an electric motor is provided in which this method is applied.
    Type: Grant
    Filed: February 23, 2008
    Date of Patent: March 19, 2013
    Assignee: Grundfos Management a/s
    Inventors: Hakon Borsting, Flemming Munk
  • Frequency converter on a motor
    Patent number: 8391005
    Abstract: A frequency converter includes a housing, which is designed and envisaged for the peripheral assembly on an electric motor. The base of the housing is provided in the middle region on the outside with longitudinal ribs and is connected to heat-producing components of the power circuit of the frequency converter, is provided in outer regions with cooling ribs which are arranged on the outside transversely or obliquely to the longitudinal ribs, and on the inside is connected in a heat-conducting manner to heat-producing components of the input circuit and/or output circuit.
    Type: Grant
    Filed: April 11, 2009
    Date of Patent: March 5, 2013
    Assignee: Grundfos Management a/s
    Inventors: Peter Monster, Niels Hogholt Petersen
  • Multi-stage centrifugal pump assembly (shaft)
    Patent number: 8376701
    Abstract: With the multi-stage centrifugal pump assembly, the connection between the motor shaft (7) and the pump shaft (9) is effected by way of a thread (26, 27), which joins the fits (31, 34) lying therebehind, between a pocket hole bore (24) in the pump-side end of the motor shaft (7) and the motor-side end of the pump shaft (9). Thereby, a transition fit (32) is provided in the region of the bearing (11), and a press fit 34 in the free region therebehind.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: February 19, 2013
    Assignee: Grundfos Management a/s
    Inventor: Karl-Henrik Svendsen
  • Pump unit
    Patent number: 8376698
    Abstract: A pump assembly has a housing formed of at least two metallic housing parts (2) and at least one diffuser (12) arranged in the housing, wherein the diffuser (12) is fixed between the two housing parts in the axial direction, and the two housing parts (2) are directly or indirectly in metallic contact with one another, in a manner such that a force transmission in the axial direction between the housing parts (2) is effected via elements of metal.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: February 19, 2013
    Assignee: Grundfos Management a/s
    Inventor: Per Frost Vedsted
  • Multi-stage centrifugal pump (axial face seal)
    Patent number: 8366388
    Abstract: An axial face seal (13), which seals a pump housing in the region of the pump shaft (12), is constructed in an axially compact manner. Spring holders (24, 25), which transmit the required pressing force of a compression spring (23), are connected to one another with a positive fit in a rotation direction, and hold a rotating axial face seal ring (19) in a rotationally fixed manner to the pump shaft (12). The spring holders (24, 25) are compact and enclose an abutment ring (33) for pump impellers as well as the compression spring (23). A motor-side spring (24) engages over the rotating axial face seal ring (19), by which an axially extremely short constructional length is achieved.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: February 5, 2013
    Assignee: Grundfos Management a/s
    Inventors: Aage Bruhn, Lars Ostergaard
  • METHOD FOR OPTIMIZING THE ENERGY OF PUMPS
    Publication number: 20130017098
    Abstract: The device for energy-optimization on operation of several centrifugal pumps controlled in rotational speed, in a hydraulic installation, begins firstly with determining which pumps as pilot pumps are assigned directly to a consumer and which pumps are hydraulically connected in series upstream of the pilot pumps. Thereafter, one or more energy-optimization circuits are formed, which in each case consist of one or more pilot pumps and of one or more pumps connected in series upstream, which deliver into the pilot pumps, wherein the energy-optimization circuits are selected such that the pumps connected in series upstream in each case are assigned to only one energy-optimization circuit, whereupon the energy-optimization circuits are energy-optimized with respect to the pumps.
    Type: Application
    Filed: January 18, 2011
    Publication date: January 17, 2013
    Applicant: GRUNDFOS MANAGEMENT A/S
    Inventors: Carsten Skovmose Kallesøe, Claudio De Persis
  • Pump assembly
    Patent number: 8333575
    Abstract: A pump unit is provided having a wet-running electric motor, wherein a rotor of the pump unit can be driven by the electric motor at a maximum speed of greater than 20,000 rev/min, and the rotor is sealed off axially in the region of a suction port.
    Type: Grant
    Filed: September 20, 2006
    Date of Patent: December 18, 2012
    Assignee: Grundfos Management a/s
    Inventors: Helge Grann, Christian Rasmussen
  • DOSING PUMP
    Publication number: 20120312399
    Abstract: A dosing pump includes a dosing chamber (14), a suction channel (32) communicating with the dosing chamber (14) and a pressure channel (20) communicating with the dosing chamber (14).
    Type: Application
    Filed: February 16, 2011
    Publication date: December 13, 2012
    Applicant: GRUNDFOS MANAGEMENT A/S
    Inventors: Sergei Gerz, Jan Knedler, Andreas Kraus
  • PUMP UNIT
    Publication number: 20120308401
    Abstract: A pump unit includes a drive motor (14) and a first housing (2), in which a control electronics unit (18) is arranged for operating the drive motor (14). An operating unit (20) having at least one display or operating element (26, 28, 30) can be detachably connected to the first housing in at least two different positions.
    Type: Application
    Filed: January 17, 2011
    Publication date: December 6, 2012
    Applicant: GRUNDFOS MANAGEMENT A/S
    Inventors: Jan Knedler, Klaus Müller, Karsten Antonius, Matthias Ulmer, Mohammad Mehdi Ayatollahzadeh
  • Reactor comprising a stack of filter plates
    Patent number: 8318014
    Abstract: A reactor includes a tubular-shaped housing in which a stack of filter plates can be rotationally arranged. The cross-sectional area of the reactor container is, in the region of the stack of filter plates, a maximum of 40% greater than the cross-sectional area of the stack of filter plates. The longitudinal extension of the reactor housing is a multiple of the longitudinal extension of the stack of filter plates, such that inside the reactor, adjacent to the stack of filter plates, additional processing devices can be arranged. The rotating stack of filter plates ensures that the entire reactor is cross-flown in an intensive manner.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: November 27, 2012
    Assignee: Grundfos Management a/s
    Inventors: Finn Beldring, Christian Rasmussen
  • Flow-routing component of a pump
    Patent number: 8317468
    Abstract: A flow-routing component of a pump is composed of at least two parts, a first part (2) of the component being manufactured by metal-powder injection molding, and a second part (4) of the component being manufactured from sheet metal. A pump assembly is also provided having such a flow-routing component.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: November 27, 2012
    Assignee: Grundfos Management a/s
    Inventors: Per Frost Vedsted, Martin Vad
  • Method for testing a main memory
    Patent number: 8315115
    Abstract: A method for testing a primary memory of control and regulation electronics of a frequency converter is described. The primary memory includes (i) at least one matrix of memory cells, (ii) means for addressing the at least one memory cell matrix, and (iii) a write/read circuit The method includes examining at least a part of the means for addressing with regard to address errors and examining at least a part of the memory cells with regard to cell errors. The examining steps are performed independently of one another. The examining at least a part of the means for addressing includes examining individual address bits of an n-bit wide address bus in steps that are performed independently of one another. The examining is dependent on use of the primary memory for operation of the frequency converter.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: November 20, 2012
    Assignee: Grundfos Management a/s
    Inventors: John Bomholt, Flemming Hedegaard, Jorn Skjellerup Rasmussen, Neils Jorgen Strom
  • Moineau pump
    Patent number: 8308459
    Abstract: A Moineau pump or Moineau compressor includes a conically designed inner (4) and a conically designed outer (8) element, whose longitudinal axes (X1, X2) run at an angle to one another and intersect at a point. The pump or compressor has at least two sections (2a, 2b, 2c, 2d) in the axial direction. A part (4b) of the inner element (4) located in a second section (2b) is arranged rotated with respect to a part (4a) of the inner element located in a first section (2a) about the longitudinal axis (X1) of the inner element (4). A part (8b) of the outer element (8) located in the second section (2b) is arranged rotated with respect to an other part (8a) of the outer element (8) located in the first section (2a) about the longitudinal axis (X2) of the outer element (8).
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: November 13, 2012
    Assignee: Grundfos Management a/s
    Inventors: Helge Grann, Sebastien D'Antonio