Patents Assigned to Grundfos A/S
-
Patent number: 9000650Abstract: The invention relates to a laminated core for electromagnetic applications with at least two segments (2), of which at least one on a side-edge (11), comprises an engagement groove (12) and the other at an opposite side-edge (9) comprises a corresponding engagement projection (10), via which the two segments (2) are connected to one another into a component, wherein the engagement groove (12) comprises an undercut in the form of a widened section (26) distanced to the groove opening, and the engagement projection (10) and the engagement groove (12) are dimensionally matched to one another in a manner such that the engagement projection (10) and/or engagement groove (12) are plastically deformed by way of inserting the engagement projection (10) into the engagement groove (12), so that the engagement projection (10) engages into the widened section (26) of the engagement groove (12), as well as to a method for the manufacture of such a laminated core.Type: GrantFiled: April 15, 2005Date of Patent: April 7, 2015Assignee: Grundfos a/sInventors: Niels Kristian Bach Andersen, Brian Lundsted Poulsen, Thomas Blad, Kjeld Hellegaard
-
Patent number: 8353676Abstract: A method for determining faults during the operation of a pump unit. At least two electric variables that determine the electric output of the motor and at least one fluctuating hydraulic variable of the pump are detected. The detected values or values formed from the variables by use of algorithms are automatically compared to predefined stored values using electronic data processing and the results of the comparison are used to determine whether or not faults have occurred.Type: GrantFiled: October 28, 2011Date of Patent: January 15, 2013Assignee: Grundfos a/sInventor: Carsten S. Kallesøe
-
Patent number: 8070457Abstract: A method is provided for determining faults during the operation of a pump unit. At least two electric variables that determine the electric output of the motor and at least one fluctuating hydraulic variable of the pump are detected. The detected values or values formed from these variables by algorithms are automatically compared to predefined stored values using electronic data processing and the results of this comparison are used to determine whether or not faults have occurred.Type: GrantFiled: February 5, 2005Date of Patent: December 6, 2011Assignee: Grundfos a/sInventor: Carsten Kallesøe
-
Patent number: 8067872Abstract: The invention relates to a permanent magnet rotor for an electric motor, in which the permanent magnets inside the rotor extend parallel to the rotation axis of the rotor, and in the area of the radially outer longitudinal edges of the permanent magnets, grooves that are open to the outside are formed on the outer periphery of the rotor. These groves are each, in a peripheral direction, slanted or curved with regard to the longitudinal edge of the adjacent permanent magnets. The center line of each groove intersects the longitudinal edge of the adjacent permanent magnet at least once. The grooves on the outside of the rotor have, in the peripheral direction, a smaller width than in an area of the groove situated radially further inside, and the cross-sectional shape of the groove is constant over the length of the rotor. The invention also relates to a method for producing a rotor of the aforementioned type.Type: GrantFiled: November 7, 2005Date of Patent: November 29, 2011Assignee: Grundfos a/sInventors: Henrik Ørskov Pedersen, Keld Folsach Rasmussen, Kjeld Hellegaard
-
Patent number: 7859211Abstract: A method for controlling the firing angle of a single-phase AC powered electric motor is provided which is triggered by at least one locking electronic switch, such as a triac (T1 and T4) located between the distribution voltage (UV) and at least one motor winding (A, B). According to said method, intervals are defined within which the triacs (T2 to T4) are to be fired according to the curve of the distribution voltage (UV) and the voltage (UEMK) induced in the respective winding in order to allow the motor to start as quickly and smoothly as possible and run quietly and at high efficiency.Type: GrantFiled: January 19, 2007Date of Patent: December 28, 2010Assignee: Grundfos a/sInventor: Jan Caroe Aarestrup
-
Patent number: 7823456Abstract: A pressure sensor is provided with a carrier (2), which in an inner region includes a membrane (4) on which at least one first measurement element (R1?) for detecting a pressure impingement of the membrane (4) is arranged. Additionally, at least one second measurement element (R3?) for detecting a pressure impingement of the membrane (4) is arranged on the membrane. The first measurement element (R1?) and the second measurement element (R3?) are arranged distanced differently far from the edge of the membrane. The output signals of the first and the second measurement element (R1?, R3?) are evaluated together in a manner such that the two measurement elements (R1?, R3?) detect a differential pressure acting on the membrane (4), and thereby compensate the influence of the system pressure acting on both sides of the membrane (4).Type: GrantFiled: March 17, 2009Date of Patent: November 2, 2010Assignee: Grundfos a/sInventors: Jens Peter Krog, Casper Pedersen, Carsten Christensen
-
Patent number: 7713771Abstract: A differential pressure sensor includes a micro-electromechanical sensor die fabricated as a plurality of sensor die sites on a semiconductor wafer, and then singularized, the sensor die having a top face surface including die electrical output pads exposed to a first test fluid source and a bottom side surface exposed to a second test fluid source. The differential pressure further has a sensor die support member having a die support member fluid access port with a support member port perimeter; wherein one of the top face surface or the bottom side surface is sealed fully around the support member port perimeter by a wafer scale seal formed on the plurality of sensor die sites before die singulation. Wafer scale seals may be formed by a photofabrication process, screen printing, stamp printing, or pressure transfer printing. Some embodiments may include a photofabricated seal formed by a photosensitive polydimethylsiloxane material, by a filled photofabricated mold, and by photopatterned glass frit.Type: GrantFiled: September 1, 2006Date of Patent: May 11, 2010Assignee: Grundfos a/sInventors: Gert Friis Eriksen, Karsten Dyrbye, Heins K. Pedersen, Robert M. Mehalso, Stephen F. Pond
-
Publication number: 20090211362Abstract: A pressure sensor is provided with a carrier (2), which in an inner region includes a membrane (4) on which at least one first measurement element (R1?) for detecting a pressure impingement of the membrane (4) is arranged. Additionally, at least one second measurement element (R3?) for detecting a pressure impingement of the membrane (4) is arranged on the membrane. The first measurement element (R1?) and the second measurement element (R3?) are arranged distanced differently far from the edge of the membrane. The output signals of the first and the second measurement element (R1?, R3?) are evaluated together in a manner such that the two measurement elements (R1?, R3?) detect a differential pressure acting on the membrane (4), and thereby compensate the influence of the system pressure acting on both sides of the membrane (4).Type: ApplicationFiled: March 17, 2009Publication date: August 27, 2009Applicant: GRUNDFOS A/SInventors: Jens Peter KROG, Casper PEDERSEN, Carsten CHRISTENSEN
-
Patent number: 7578397Abstract: A device is provided for fluid treatment, in particular for waste water treatment. The fluid is led along a surface (3) coated with biological material. A wiper element (5) is provided, which brushes the surface (3) not as a whole, but in paths. The path course is selected such that the coated surface (3) is successively brushed in sections.Type: GrantFiled: June 29, 2005Date of Patent: August 25, 2009Assignee: Grundfos a/sInventors: Christian Rasmussen, Finn Beldring
-
Publication number: 20090127961Abstract: The invention relates to a permanent magnet rotor for an electric motor, in which the permanent magnets inside the rotor extend parallel to the rotation axis of the rotor, and in the area of the radially outer longitudinal edges of the permanent magnets, grooves that are open to the outside are formed on the outer periphery of the rotor. These groves are each, in a peripheral direction, slanted or curved with regard to the longitudinal edge of the adjacent permanent magnets. The center line of each groove intersects the longitudinal edge of the adjacent permanent magnet at least once. The grooves on the outside of the rotor have, in the peripheral direction, a smaller width than in an area of the groove situated radially further inside, and the cross-sectional shape of the groove is constant over the length of the rotor. The invention also relates to a method for producing a rotor of the aforementioned type.Type: ApplicationFiled: November 7, 2005Publication date: May 21, 2009Applicant: GRUNDFOS A/SInventors: Henrik Orskov Pedersen, Keld Folsach Rasmussen, Kjeld Hellegaard
-
Patent number: 7509866Abstract: The invention relates to a pressure sensor with a carrier (2), which in an inner region comprises a membrane (4) on which at least one first measurement element (R1?) for detecting a pressure impingement of the membrane (4) is arranged, wherein additionally at least one second measurement element (R3?) for detecting a pressure impingement of the membrane (4) is arranged on the membrane, wherein the first measurement element (R1?) and the second measurement element (R3?) are arranged distanced differently far from the edge of the membrane, and the output signals of the first and the second measurement element (R1?, R3?) are evaluated together in a manner such that the two measurement elements (R1?, R3?) detect a differential pressure acting on the membrane (4), and thereby compensate the influence of the system pressure acting on both sides of the membrane (4).Type: GrantFiled: August 6, 2005Date of Patent: March 31, 2009Assignee: Grundfos a/sInventors: Jens Peter Krog, Casper Pedersen, Carsten Christensen
-
Publication number: 20090038292Abstract: A metering pump assembly for admixing a fluid reduction agent from a supply container and a pressurized air flow into an exhaust gas flow of a combustion engine includes an assembly housing and a pre-mixer at least partially within the housing. A membrane pump within the housing is fluidly connected between the supply container and the pre-mixer. An electric motor generates a rotational output. A transmission converts the rotational output of the electric motor into translatory movement. The translatory movement drives the membrane pump to pump the reduction agent from the supply container into the pre-mixer. The pressurized air flow is in fluid communication with the pre-mixer and mixes with the reduction agent within the pre-mixer to form a reduction agent air mixture. An exit conduit fluidly connects the pre-mixer to the exhaust gas flow. The reduction air mixture is delivered through the exit conduit and into the exhaust gas flow.Type: ApplicationFiled: August 7, 2008Publication date: February 12, 2009Applicant: GRUNDFOS A/SInventor: Jan PLOUGMANN
-
Patent number: 7458204Abstract: A dosing pump assembly (9) is provided which is adapted to admix a liquid reducing agent to an exhaust gas flow. The dosing pump assembly includes an assembly housing (12) that houses an electric drive (15), a transmission (16), a membrane pump (17), and control and/or regulating electronics. The assembly housing (10) further includes a pre-mixing device in which the liquid reducing agent is impinged upon with a pressurized gas flow.Type: GrantFiled: June 23, 2005Date of Patent: December 2, 2008Assignee: Grundfos a/sInventor: Jan Plougmann
-
Publication number: 20080054383Abstract: A differential pressure sensor includes a micro-electromechanical sensor die fabricated as a plurality of sensor die sites on a semiconductor wafer, and then singularized, the sensor die having a top face surface including die electrical output pads exposed to a first test fluid source and a bottom side surface exposed to a second test fluid source. The differential pressure further has a sensor die support member having a die support member fluid access port with a support member port perimeter; wherein one of the top face surface or the bottom side surface is sealed fully around the support member port perimeter by a wafer scale seal formed on the plurality of sensor die sites before die singulation. Wafer scale seals may be formed by a photofabrication process, screen printing, stamp printing, or pressure transfer printing. Some embodiments may include a photofabricated seal formed by a photosensitive polydimethylsiloxane material, by a filled photofabricated mold, and by photopatterned glass frit.Type: ApplicationFiled: September 1, 2006Publication date: March 6, 2008Applicant: GRUNDFOS A/SInventors: Gert Friis ERIKSEN, Karsten DYRBYE, Heins K. PEDERSEN, Robert M. MEHALSO, Stephen F. POND
-
Publication number: 20080022779Abstract: The invention relates to a pressure sensor with a carrier (2), which in an inner region comprises a membrane (4) on which at least one first measurement element (R1?) for detecting a pressure impingement of the membrane (4) is arranged, wherein additionally at least one second measurement element (R3?) for detecting a pressure impingement of the membrane (4) is arranged on the membrane, wherein the first measurement element (R1?) and the second measurement element (R3?) are arranged distanced differently far from the edge of the membrane, and the output signals of the first and the second measurement element (R1?, R3?) are evaluated together in a manner such that the two measurement elements (R1?, R3?) detect a differential pressure acting on the membrane (4), and thereby compensate the influence of the system pressure acting on both sides of the membrane (4).Type: ApplicationFiled: August 6, 2005Publication date: January 31, 2008Applicant: GRUNDFOS A/SInventors: Jens Peter Krog, Casper Pedersen, Carsten Christensen
-
Publication number: 20080006572Abstract: A device is provided for fluid treatment, in particular for waste water treatment. The fluid is led along a surface (3) coated with biological material. A wiper element (5) is provided, which brushes the surface (3) not as a whole, but in paths. The path course is selected such that the coated surface (3) is successively brushed in sections.Type: ApplicationFiled: June 29, 2005Publication date: January 10, 2008Applicant: GRUNDFOS A/SInventors: Christian Rasmussen, Finn Beldring
-
Patent number: 7317296Abstract: The electric motor is equipped with an electronic control, for example in the form of a frequency converter (2) and comprises at least one Seebeck element (6) whose one side is connected to the motor (1) in a heat-conducting manner and whose other side is in heat-conducting connection with a cooling medium. The electrical output power of the Seebeck element (6) is led to the electronic control (2) of the motor (1).Type: GrantFiled: May 19, 2004Date of Patent: January 8, 2008Assignee: Grundfos A/SInventor: Pierre Vadstrup
-
Patent number: 7264450Abstract: The method is provided for operating a pump unit with a centrifugal pump which is driven by an electric motor and which comprises a rotor running in a split tube. The rotor space is separated with respect to the stator in a fluid-tight manner. On running the motor to its operational rotational speed the fluid located in the rotor space due to the increasing rotational speed evaporates and is removed so that the motor finally functions as a dry-runner.Type: GrantFiled: December 22, 2000Date of Patent: September 4, 2007Assignee: Grundfos a/sInventor: Jorgen Christensen
-
Publication number: 20070196615Abstract: The invention relates to a laminated core for electromagnetic applications with at least two segments (2), of which at least one on a side-edge (11), comprises an engagement groove (12) and the other at an opposite side-edge (9) comprises a corresponding engagement projection (10), via which the two segments (2) are connected to one another into a component, wherein the engagement groove (12) comprises an undercut in the form of a widened section (26) distanced to the groove opening, and the engagement projection (10) and the engagement groove (12) are dimensionally matched to one another in a manner such that the engagement projection (10) and/or engagement groove (12) are plastically deformed by way of inserting the engagement projection (10) into the engagement groove (12), so that the engagement projection (10) engages into the widened section (26) of the engagement groove (12), as well as to a method for the manufacture of such a laminated core.Type: ApplicationFiled: April 15, 2005Publication date: August 23, 2007Applicant: GRUNDFOS A/SInventors: Niels Bach Andersen, Brian Lunsted Poulsen, Thomas Blad, Kjeld Hellegaard
-
Patent number: 7195462Abstract: The invention relates to a method for controlling several pumps in a pump sump, with which each pump comprises a switch which switches on the pump and each pump after its running is first blocked and depending on the running of the further pumps in the pump sump is released again. The invention further relates to a pump for carrying out this method.Type: GrantFiled: August 22, 2003Date of Patent: March 27, 2007Assignee: Grundfos a/sInventors: Peter Jungklas Nybo, Lasse Ilves, Heikki Yli-Korpela