Patents by Inventor Per Larsson
Per Larsson 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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Publication number: 20130213876Abstract: A device for cleaning a filter cloth (4) of at least one filter element (3) in a rotary disc filter (1), including at least one flush tube (6), the centre axis of which is located between two adjacent parallel filter elements, and which includes at least one outlet (9) arranged in a direction other than towards the respective filter cloth (4), and at least one spray nozzle (5) connected to said outlet (9). A connection (13) to the spray nozzle (5) extends essentially parallel to said filter element (3) and the spray nozzle (5) includes an angled redirecting channel (14) for distribution of cleaning liquid in a direction towards the filter cloth (4) of said filter element (3). A plurality of spray nozzles (5) are arranged in pairs around the flush tube (6) and with their respective outlet openings (8) located at a distance from the respective filter element (3), which is larger than half the spacing between two adjacent parallel filter elements (3).Type: ApplicationFiled: October 7, 2011Publication date: August 22, 2013Applicant: Veolia Water Solutions & Technologies SupportInventor: Per Larsson
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Publication number: 20130153486Abstract: A rotary disc filter device includes a rotary drum and one or more disc-shaped filter members secured about the drum. Each disc-shaped filter member includes a filter and a filter support comprising a series of modules. The modules each include a base that is secured to the rotary drum and a support arm projecting outwardly from the base. The modules are interconnected and disposed around the rotary drum.Type: ApplicationFiled: February 13, 2013Publication date: June 20, 2013Applicant: VEOLIA WATER SOLUTIONS & TECHNOLOGIES SUPPORTInventors: Åke Danielsson, Åke Ralvert, Emil Svensson, Per Larsson
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Patent number: 8409436Abstract: A rotary disc filter device includes a rotary drum and one or more disc-shaped filter members secured about the drum. Each disc-shaped filter member includes a filter and a filter support comprising a series of modules. The modules each include a base that is secured to the rotary drum and a support arm projecting outwardly from the base. The modules are interconnected and disposed around the rotary drum.Type: GrantFiled: July 1, 2011Date of Patent: April 2, 2013Assignee: Veolia Water Solutions & Technologies SupportInventors: Åke Danielsson, Åke Ralvert, Emil Svensson, Per Larsson
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Publication number: 20120103890Abstract: The present invention refers to a module (2) for assembly of a filter frame (1) for at least one filter disc (not shown) of a rotatable disc filter, which filter frame is provided for supporting at least two filter segments (not shown), which filter segments together form the outer part of said filter disc. The module (2) comprises an intermediate member (5) intended to beat least partially provided between two adjacent filter segments.Type: ApplicationFiled: May 5, 2010Publication date: May 3, 2012Inventors: Per Larsson, Emil Svensson, Kjell- Åke
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Publication number: 20120059572Abstract: A method is provided for controlling an exhaust gas temperature of an engine of a vehicle during interruption of fuel supply to the engine, wherein the engine drives a driveline of the vehicle. The method involves alternating between two or more operational modes, wherein at least one of the operational modes maintains a higher exhaust temperature than the one or more other operational modes.Type: ApplicationFiled: March 24, 2009Publication date: March 8, 2012Applicant: VOLVO LASTVAGNAR ABInventors: Per Larsson, Christer Alm, Hans Bernler
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Publication number: 20120000842Abstract: A rotary disc filter device includes a rotary drum and one or more disc-shaped filter members secured about the drum. Each disc-shaped filter member includes a filter and a filter support comprising a series of modules. The modules each include a base that is secured to the rotary drum and a support arm projecting outwardly from the base. The modules are interconnected and disposed around the rotary drum.Type: ApplicationFiled: July 1, 2011Publication date: January 5, 2012Applicant: VEOLIA WATER SOLUTIONS & TECHNOLOGIES SUPPORTInventors: Åke Danielsson, Åke Ralvert, Emil Svensson, Per Larsson
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Patent number: 7972508Abstract: A rotary disc filter device includes a rotary drum and one or more disc-shaped filter members secured about the drum. Each disc-shaped filter member includes a filter disposed on opposite sides thereof and each disc-shaped filter member includes a modular frame made up, in part at least, by a series of interconnected modules. One module of the modular filter frame includes a base that is secured to the rotary drum and a support projecting outwardly from the base. A series of these modules are interconnected to form a modular filter frame.Type: GrantFiled: September 30, 2009Date of Patent: July 5, 2011Assignee: Veolia Water Solutions & Technologies SupportInventors: Åke Danielsson, Åke Ralvert, Emil Svensson, Per Larsson
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Publication number: 20100101531Abstract: An engine brake system and a method for controlling the exhaust gas pressure of an exhaust system for a vehicle provided with an engine are provided. The system includes a main exhaust gas conduit connected to the turbine of a turbo arrangement and an Exhaust Pressure Governor (EPG) which is used to create a backpressure in the exhaust system so as to function as an engine brake. The turbo arrangement includes a Variable Geometry Turbine (VGT). The Exhaust Pressure Governor is located in a bypass conduit which is connected to the main exhaust conduit upstream the connection to the turbine of the turbo arrangement and the main exhaust conduit includes a valve arrangement downstream the bypass conduit connection for closing the main exhaust conduit. According to the method for controlling the system, the flow passage through the main conduit is open and the flow through the bypass conduit is closed in response to an output control indicating that no engine braking is desired.Type: ApplicationFiled: December 20, 2006Publication date: April 29, 2010Applicant: Volvo Lastvagnar ABInventors: Peter Carlström, Per Larsson
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Publication number: 20100012570Abstract: A rotary disc filter device includes a rotary drum and one or more disc-shaped filter members secured about the drum. Each disc-shaped filter member includes a filter disposed on opposite sides thereof and each disc-shaped filter member includes a modular frame made up, in part at least, by a series of interconnected modules. One module of the modular filter frame includes a base that is secured to the rotary drum and a support projecting outwardly from the base. A series of these modules are interconnected to form a modular filter frame.Type: ApplicationFiled: September 30, 2009Publication date: January 21, 2010Applicant: HYDROTECH VEOLIA WATER SYSTEMS AKTIEBOLAGInventors: Åke Danielsson, Åke Ralvert, Emil Svensson, Per Larsson
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Patent number: 7597805Abstract: A rotary disk filter and a module for building a filter support for a rotary disk filter are disclosed. The rotary disk filter may comprise a drum, which is rotatable about its central longitudinal axis. The rotary disk filter may be adapted to receive a liquid which is to be filtered. In one implementation, the rotary disk filter may comprise at least one disk-shaped filter member which on the outside of the drum extends outwards in the transverse direction of the drum, and which has a filter support and at least one filter portion supported thereby. A first liquid duct may extend from the drum through the filter member and out through the filter portion. The filter portion may be made of filter segments, which are detachably secured to the filter support. At least one second liquid duct may extend between adjoining filter segments to provide liquid communication between the filter segments.Type: GrantFiled: February 24, 2004Date of Patent: October 6, 2009Assignee: Hydrotech Veolia Water Systems AktiebolagInventors: Åke Danielsson, Åke Ralvert, Emil Svensson, Per Larsson
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Patent number: 7501775Abstract: The invention concerns a switching device system including at least one switching device, signal means and control means. Each switching device includes at least one mobile contact part, an electric motor and, coupling means. The coupling means is arranged to transfer motion from the electric motor to the mobile contact part. The control means is arranged to control the switching device. According to the invention the control means is at least partly remotely located from the switching device. The signal means transmit signals from the switching device to the remotely located control means and vice/versa. The signals represent real-time data and/or off-line data. The invention concerns also a switching device, control means and methods related to the invented system as well as computer program products for such system and electric power system being provided with such system.Type: GrantFiled: September 18, 2001Date of Patent: March 10, 2009Assignee: ABB ABInventors: Stefan Valdemarsson, Per Larsson, Philip C. Kjaer, Per-Olof Thureson, Sjoerd G. Bosga
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Publication number: 20080253612Abstract: The invention relates to a method for locating and picking up objects that are placed on a carrier. A scanning operation is performed over the carrier. The scanning is performed by a line laser scanner whose results are used to generate a virtual surface that represents the area that has been scanned. The virtual surface is compared to a pre-defined virtual object corresponding to an object to be picked from the carrier, whereby a part of the virtual surface that matches the pre-defined virtual object is identified. A robot arm is then caused to move to a location corresponding to the identified part of the virtual surface and pick up an object from the carrier at this location.Type: ApplicationFiled: October 16, 2006Publication date: October 16, 2008Applicant: Morphic Technologies AktiebolagInventors: Anders Reyier, Per Larsson
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Patent number: 7166936Abstract: An apparatus for controlling an electric switching device (1) for alternating current arranged in a current path for opening the switching device and for breaking the current in the current path after occurrence of a fault current comprises members (15) adapted to detect the current in the current path and a unit (20) adapted to control the electric switching device to break the current in the current path directly after a half wave of the alternating current having a peak value below a predetermined current limit value, so that the breaking is completed through a zero-crossing of the alternating current terminating a said half wave.Type: GrantFiled: June 7, 2001Date of Patent: January 23, 2007Assignee: ABB Group Services Center ABInventors: Per Larsson, Magnus Backman, Lars Jonsson
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Patent number: 7151353Abstract: A method for evaluating a condition of a switching device. The switching device includes contact parts, an electric motor and a mechanical coupling device for transforming motion from the electric motor to at least one of the contact parts. A self-diagnostic test is performed on a component of the switching device. The test includes making at least one small movement with the electric motor. A switching device includes contact parts, an electric motor, a mechanical coupling device for transforming motion from the electric motor to at least one of the contact parts, and tester for making self-diagnostic tests, wherein the tester makes small motor movements that are a fraction of a full breaking movement, thereby producing data for evaluating a condition of the switching device.Type: GrantFiled: September 17, 2001Date of Patent: December 19, 2006Assignee: ABB ABInventors: Sjoerd G. Bosga, Philip C. Kiaer, Magnus Backman, Mats Svensson, Per-Olof Thureson, Lars Jonsson, Freddy Magnussen, Per Larsson, Stefan Valdemarsson
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Publication number: 20060260999Abstract: A rotary disk filter and a module for building a filter support for a rotary disk filter are disclosed. The rotary disk filter may comprise a drum, which is rotatable about its central longitudinal axis. The rotary disk filter may be adapted to receive a liquid which is to be filtered. In one implementation, the rotary disk filter may comprise at least one disk-shaped filter member which on the outside of the drum extends outwards in the transverse direction of the drum, and which has a filter support and at least one filter portion supported thereby. A first liquid duct may extend from the drum through the filter member and out through the filter portion. The filter portion may be made of filter segments, which are detachably secured to the filter support. At least one second liquid duct may extend between adjoining filter segments to provide liquid communication between the filter segments.Type: ApplicationFiled: February 24, 2004Publication date: November 23, 2006Inventors: Ake Danielsson, Ake Ralvert, Emil Svensson, Per Larsson
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Patent number: 7014414Abstract: Apparatus for for stacking papermaking pulp bales is disclosed, comprising two sets of lifting forks, which are directed towards each other for lifting bales, and a conveyor for inserting a new bale beneath the lifted bales. The lifting forks are horizontally movable between an advanced active lifting position and an inactive retracted position and have forward portions with a continuously decreasing thickness. The drive means for the lifting forks comprise a motor and a freewheel clutch for lifting and lowering the lifting forks, so that the lowering movement for both sets of lifting forks is automatically and individually adapted to their pulling-out movement when they rest on the underlying bale, although the speed of the drive motors which operate in a synchronized manner need not be controlled.Type: GrantFiled: January 28, 2002Date of Patent: March 21, 2006Assignee: Metso Paper, Inc.Inventors: Göran Forhaug, Mats Norberg, Per Larsson
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Patent number: 7010436Abstract: An apparatus (14) for detecting a zero-crossing of an alternating current after occurrence of a fault in a current path (2) for determining a suitable time for opening an electric switching device (2) arranged in the current path for breaking the current in the current path comprises members (15) adapted to detect the current in the current path. An arrangement (19) is adapted to calculate the dc-level of the current and the decay of the dc-level with time on the basis of values of the alternating current detected and also predict the time for a future zero-crossing of the alternating current on the basis of at least current values obtained through said current detection, the dc-level calculated, the dc-decay calculated and information about the period time of the alternating current.Type: GrantFiled: June 7, 2001Date of Patent: March 7, 2006Assignee: ABB Group Services Center ABInventors: Per Larsson, Magnus Backman, Lars Jonsson
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Patent number: 6960844Abstract: An electric switching device for alternating current comprises two branches (2, 3) connected in parallel in a current path and having each at least two contact members (4–7) connected in series. A semiconductor device (8) is adapted to interconnect the midpoints between the two contact members of each branch. When opening the current path a first contact member (5) of one, first branch located before said midpoint as seen in the current direction existing is controlled to open and a second contact member (6) of the second branch located after the midpoint as seen in the current direction is controlled to open for transferring the current to a temporary current path through the semiconductor device. The current path through the switching device is then broken when the semiconductor device is in a blocking state by opening a contact member (4, 7) of the switching device arranged in the temporary current path.Type: GrantFiled: November 20, 2000Date of Patent: November 1, 2005Assignee: ABB Technology AGInventors: Falah Al-Hosini, Jan Smede, Jan-Anders Nygren Nolemo, Magnus Backman, Philip Kjaer, Lennart Balgård, Per Larsson, Ove Albertsson, Lars Jonsson, Jan Johansson
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Patent number: 6895753Abstract: Apparatus and method for supplying sealing air to an exhaust turbine (15) that interacts with an internal combustion engine for turbo-compound operation in a vehicle. Exhaust gases from the internal combustion engine are received in an exhaust system having a supercharger turbine (11) and which drives a compressor (13) for the engine combustion air. Residual energy in the exhaust gas flow is recovered via the exhaust turbine (15) for transfer to the crankshaft of the internal combustion engine. The exhaust turbine (15) is supported in a bearing housing (32), which is fed with sealing air via a fluid line (36). The exhaust system includes an exhaust brake throttle (16) having an exhaust gas pressure regulator (22) for regulating the exhaust brake pressure. The exhaust gas pressure regulator (22) is connected via a compressed air line (28) to a compressed air source (29, 30), which can be connected in parallel to the bearing housing (32) via a prioritizing valve (35) and a compressed air line (36).Type: GrantFiled: December 20, 2003Date of Patent: May 24, 2005Assignee: Volvo Lastvagnar ABInventors: Per Larsson, Nils-Olof Håkansson
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Patent number: D597208Type: GrantFiled: April 9, 2008Date of Patent: July 28, 2009Assignee: Directa ABInventors: Dan Ericsson, Per Larsson, Stefan Leffler, Olof Larsson