Patents by Inventor Erik Haugaard
Erik Haugaard 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: 10711780Abstract: A hydraulic machine is described having a first part (2) and a second part (3) moveable relative to said first part (3), one of said first part (2) and said second part (3) having a first land (9) resting against the other one of said second part (3) and said first part (2), having a predetermined first height (H1), and being arranged between a high pressure area (7) and a low pressure area (8). Such a machine should have a long working life. To this end a second land (10) having a predetermined second height (H2) smaller than said first height (H1) is located adjacent to said first land (9).Type: GrantFiled: June 21, 2016Date of Patent: July 14, 2020Assignee: Danfoss A/SInventors: Stig Kildegaard Andersen, Poul Erik Hansen, Erik Haugaard
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Patent number: 10415565Abstract: A vane cell machine is provided comprising a housing having a stator bore with an outer limitation formed by a circumferential wall and two axial end faces (5), a rotor mounted rotatably in said stator bore, a plurality of vanes moveable in radial direction relative to said rotor and sliding along said circumferential wall, and sealing means (12) at least at one of said end faces (5), said sealing means (12) acting on said rotor in axial direction. Such a vane cell machine should have a simple construction. To this end said end face (5) is formed at an end plate (11) of said housing wherein said end plate (11) comprises a recess in which said sealing means (12) are rotated.Type: GrantFiled: February 8, 2016Date of Patent: September 17, 2019Assignee: Danfoss A/SInventor: Erik Haugaard
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Patent number: 10352322Abstract: A vane cell machine (1) is described comprising a stator (2) and a rotor (3), said rotor (3) having radially displaceable vanes (4) bearing on an inside (5) of the stator (2) and bordering, together with the rotor (3), the stator (2), and a side wall (7) at each axial end of the rotor (3), work chambers (6) the volume of which changes during a rotation of said rotor, at least one side wall (7) bearing an insert in form of a ring (9). Such a machine should be of simple construction. To this end, said ring (9) comprises a centric bore (10).Type: GrantFiled: June 21, 2016Date of Patent: July 16, 2019Assignee: Danfoss A/SInventors: Stig Kildegaard Andersen, Poul Erik Hansen, Erik Haugaard
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Patent number: 10288051Abstract: A hydraulic machine arrangement (1) is described having a housing (5), a working section and a hollow inside said housing (5), a supply port arrangement LPin, HPin, LPout connected to said working area, and a leakage path (7) between said working section and said hollow. It should be possible to detect wear with simple means. To this end, said housing (5) is provided with a leakage port (8) connected to said hollow.Type: GrantFiled: June 21, 2016Date of Patent: May 14, 2019Assignee: Danfoss A/SInventors: Stig Kildegaard Andersen, Poul Erik Hansen, Erik Haugaard
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Patent number: 10145366Abstract: A hydraulic arrangement (1) is provided comprising a pressure exchanger (2) having an axis (3) of rotation, and a booster pump (4), said pressure exchanger (2) and said booster pump (4) being connected to each other. Such a hydraulic arrangement should have a good efficiency. To this end a single connection flange (5) is provided between said pressure exchanger (2) and the booster pump (4).Type: GrantFiled: February 8, 2016Date of Patent: December 4, 2018Assignee: Danfoss A/SInventors: Stig Kildegaard Andersen, Erik Haugaard, Palle Olsen, Poul Erik Hansen
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Patent number: 9945231Abstract: The invention specifies a hydraulic vane-type machine (1) having a stator (2) and having a rotor (3) which has multiple vanes (4), each of which vanes is radially displaceable in a guide (5) in the rotor (3), bears against an inner circumference (6) of the stator (2), and, together with the rotor (3), the stator (2) and in each case one side wall (7) at each axial end of the rotor (3), delimits working chambers whose volumes vary in the event of a rotation of the rotor (3) relative to the stator (2). It is sought to obtain a certain degree of freedom for the design of the inner circumference. For this purpose, it is provided that each vane (4) has, on its radially inner side, an abutment surface (17) which bears radially at the outside against a cam disk (15).Type: GrantFiled: November 3, 2015Date of Patent: April 17, 2018Assignee: Danfoss A/SInventors: Erik Haugaard, Hans Christian Petersen
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Patent number: 9926930Abstract: A vane pump (1) is disclosed comprising a housing (2) having a stator bore, a rotor (4) being rotatably mounted within said stator bore, and having a number of vanes (5) slidably mounted in said rotor (4) in radial direction of said rotor (4), an inlet (11) and an outlet (12). Such a vane pump should have a good efficiency. To this end said inlet (11) opens in an axial end wall of said stator bore (3) and said outlet (12) is connected to an outflow area formed in a circumferential wall (3) of said stator bore.Type: GrantFiled: February 8, 2016Date of Patent: March 27, 2018Assignee: Danfoss A/SInventor: Erik Haugaard
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Patent number: 9821273Abstract: The invention concerns a reverse osmosis system (1) with at least one membrane unit (2) comprising an inlet (3), a permeate outlet (4) and a concentrate outlet (5), a high-pressure pump (8) that is connected to the inlet (3), a pressure exchanger (11) comprising at least one high-pressure concentrate connection (HPC), and a booster pump. It is endeavored to achieve the lowest possible energy consumption. For this purpose, the booster pump is made as a displacement pump (16) that is arranged between the concentrate outlet (5) and the high-pressure concentrate connection (HPC) of the pressure exchanger (11).Type: GrantFiled: February 24, 2011Date of Patent: November 21, 2017Assignee: Danfoss A/SInventors: Welm Friedrichsen, Lasse Nicolai Langmaack, Palle Olsen, Erik Haugaard
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Publication number: 20160377080Abstract: A vane cell machine (1) is described comprising a stator (2) and a rotor (3), said rotor (3) having radially displaceable vanes (4) bearing on an inside (5) of the stator (2) and bordering, together with the rotor (3), the stator (2), and a side wall (7) at each axial end of the rotor (3), work chambers (6) the volume of which changes during a rotation of said rotor, at least one side wall (7) bearing an insert in form of a ring (9). Such a machine should be of simple construction. To this end, said ring (9) comprises a centric bore (10).Type: ApplicationFiled: June 21, 2016Publication date: December 29, 2016Inventors: Stig Kildegaard Andersen, Poul Erik Hansen, Erik Haugaard
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Publication number: 20160377070Abstract: A hydraulic machine arrangement (1) is described having a housing (5), a working section and a hollow inside said housing (5), a supply port arrangement LPin, HPin, LPout connected to said working area, and a leakage path (7) between said working section and said hollow. It should be possible to detect wear with simple means. To this end, said housing (5) is provided with a leakage port (8) connected to said hollow.Type: ApplicationFiled: June 21, 2016Publication date: December 29, 2016Inventors: Stig Kildegaard Andersen, Poul Erik Hansen, Erik Haugaard
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Publication number: 20160377079Abstract: A hydraulic machine is described having a first part (2) and a second part (3) moveable relative to said first part (3), one of said first part (2) and said second part (3) having a first land (9) resting against the other one of said second part (3) and said first part (2), having a predetermined first height (H1), and being arranged between a high pressure area (7) and a low pressure area (8). Such a machine should have a long working life. To this end a second land (10) having a predetermined second height (H2) smaller than said first height (H1) is located adjacent to said first land (9).Type: ApplicationFiled: June 21, 2016Publication date: December 29, 2016Inventors: Stig Kildegaard Andersen, Poul Erik Hansen, Erik Haugaard
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Patent number: 9416795Abstract: The invention concerns a reverse osmosis system (1) with a membrane unit (2) comprising an inlet (3), a permeate outlet (4) and a concentrate outlet (5), a high-pressure pump (8) that is connected to the inlet (3), a pressure exchanger (11) connected on its concentrate side (10) to the concentrate outlet (5), and a booster pump between the pressure exchanger (11) and the inlet (3). It is endeavored to make the energy consumption as small as possible. For this purpose, the booster pump is made as a displacement pump.Type: GrantFiled: August 28, 2009Date of Patent: August 16, 2016Assignee: Danfoss A/SInventors: Welm Friedrichsen, Palle Olsen, Erik Haugaard
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Publication number: 20160230761Abstract: A hydraulic arrangement (1) is provided comprising a pressure exchanger (2) having an axis (3) of rotation, and a booster pump (4), said pressure exchanger (2) and said booster pump (4) being connected to each other. Such a hydraulic arrangement should have a good efficiency. To this end a single connection flange (5) is provided between said pressure exchanger (2) and the booster pump (4).Type: ApplicationFiled: February 8, 2016Publication date: August 11, 2016Inventors: Stig Kildegaard Andersen, Erik Haugaard, Palle Olsen, Poul Erik Hansen
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Publication number: 20160230757Abstract: A vane cell machine is provided comprising a housing having a stator bore with an outer limitation formed by a circumferential wall and two axial end faces (5), a rotor mounted rotatably in said stator bore, a plurality of vanes moveable in radial direction relative to said rotor and sliding along said circumferential wall, and sealing means (12) at least at one of said end faces (5), said sealing means (12) acting on said rotor in axial direction. Such a vane cell machine should have a simple construction. To this end said end face (5) is formed at an end plate (11) of said housing wherein said end plate (11) comprises a recess in which said sealing means (12) are rotated.Type: ApplicationFiled: February 8, 2016Publication date: August 11, 2016Inventor: Erik Haugaard
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Publication number: 20160230758Abstract: A vane pump (1) is disclosed comprising a housing (2) having a stator bore, a rotor (4) being rotatably mounted within said stator bore, and having a number of vanes (5) slidably mounted in said rotor (4) in radial direction of said rotor (4), an inlet (11) and an outlet (12). Such a vane pump should have a good efficiency. To this end said inlet (11) opens in an axial end wall of said stator bore (3) and said outlet (12) is connected to an outflow area formed in a circumferential wall (3) of said stator bore.Type: ApplicationFiled: February 8, 2016Publication date: August 11, 2016Inventor: Erik Haugaard
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Publication number: 20160138398Abstract: The invention specifies a hydraulic vane-type machine (1) having a stator (2) and having a rotor (3) which has multiple vanes (4), each of which vanes is radially displaceable in a guide (5) in the rotor (3), bears against an inner circumference (6) of the stator (2), and, together with the rotor (3), the stator (2) and in each case one side wall (7) at each axial end of the rotor (3), delimits working chambers whose volumes vary in the event of a rotation of the rotor (3) relative to the stator (2). It is sought to obtain a certain degree of freedom for the design of the inner circumference. For this purpose, it is provided that each vane (4) has, on its radially inner side, an abutment surface (17) which bears radially at the outside against a cam disk (15).Type: ApplicationFiled: November 3, 2015Publication date: May 19, 2016Applicant: DANFOSS A/SInventors: Erik Haugaard, Hans Christian Petersen
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Patent number: 9279424Abstract: The invention concerns a vane cell machine with a stator and a rotor having radially displaceable vanes arranged in guides, said vanes bearing on an inside of the stator and bordering, together with the rotor, the stator and a side wall, work chambers at each axial end of the rotor. It is endeavored to provide a vane cell machine that has a good internal tightness, in which the wear is still kept small. For this purpose, in a radially internal area the side wall comprises an insert that is axially movable in the side wall and has a pressure application surface axially inside and axially outside.Type: GrantFiled: October 24, 2012Date of Patent: March 8, 2016Assignee: Danfoss A/SInventors: Hans Christian Petersen, Ove Thorboel Hansen, Lars Martensen, Palle Olsen, Erik Haugaard
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Patent number: 8951027Abstract: The invention concerns a vane cell machine having a stator and a rotor that is made of a first material, the rotor having guides comprising radially displaceable vanes that rest on an inside of the stator and border work chambers at each axial end of the rotor together with the rotor, the stator and individual stationary side walls, the vanes having, at least at some contact faces with the rotor and the stator, a second material that interacts unfrictionally with the first material. It is endeavoured to keep the wear small. For this purpose, in a radially inner area, the side wall comprises a surface of a third material interacting unfrictionally with the first material and, in a radially outer area a surface made of the first material.Type: GrantFiled: October 24, 2012Date of Patent: February 10, 2015Assignee: Danfoss A/SInventors: Hans Christian Petersen, Ove Thorboel Hansen, Lars Martensen, Palle Olsen, Erik Haugaard
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Patent number: 8444110Abstract: The invention concerns a valve arrangement (7) comprising a flow path (11) connecting an inlet (9) and an outlet (10), a closing means (12) arranged in said flow path (11), a resetting means and a first pressure in a first pressure chamber (14) acting in a closing direction on said closing means (12), a pressure of said outlet (10) and a second pressure in a second pressure chamber (18) corresponding to a pressure of said inlet (9) when said closing means (12) is closed acting in opening direction on said closing means (12), said first pressure chamber (14) being connectable to the outlet (10) via an auxiliary valve (13). It is intended to keep small a pressure pulse when opening the valve arrangement (7). This is achieved in that the closing means (12) having a first opening state (A) and a second opening state (B), a flow resistance of said closing means (12) in said first opening state (A) being larger than a flow resistance of said closing means in said second opening state (B).Type: GrantFiled: May 24, 2010Date of Patent: May 21, 2013Assignee: Danfoss A/SInventors: Verner Smidt, Lasse Nicolai Langmaack, Siegfried Zenker, Erik Haugaard, Carsten Christensen, Welm Friedrichsen
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Patent number: D763322Type: GrantFiled: July 15, 2015Date of Patent: August 9, 2016Assignee: Danfoss A/SInventors: Erik Haugaard, Poul Erik Hansen, Stig Andersen