Patents by Inventor Ulf Petersson
Ulf Petersson 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: 20240051107Abstract: A method performed in a control unit of a power tool driven by an electric motor, for detecting a fault state in the power tool, wherein the electric motor is associated with a motor current drawn over a motor interface, the method comprising monitoring a parameter of the electric motor during operation of the power tool, wherein the parameter is indicative of the motor current, obtaining a fault model, wherein the fault model is configured to classify a state of the power tool into a pre-determined number of states comprising one or more fault states, based on a series of electric motor parameter values, classifying a state of the power tool into the pre-determined number of states based on the fault model and on one or more values of the monitored electric motor parameter, and triggering an action by the power tool in case the state of the power tool is classified as a fault state.Type: ApplicationFiled: December 13, 2021Publication date: February 15, 2024Inventors: Ulf Petersson, Andreas Jönsson
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Publication number: 20230166340Abstract: A drilling machine (120) for a core drill (100), the drilling machine comprises a motor arranged to power a spindle, the spindle comprising a drill bit interface (121 ) arranged to hold a drill bit (110) and to rotate the drill bit (110) about an axle of rotation (101 ), the drilling machine (120) comprising a tag reader (125) connected to a reader coil, wherein the reader coil is arranged at the drill bit interface (121 ) and surrounding the spindle to inductively couple to a tag coil arranged on the drill bit, the drilling machine (120) further comprising a drilling machine control unit (140) connected to the tag reader (125), wherein the drilling machine control unit is arranged to read data associated with the drill bit (110) via the inductively coupled reader and tag coils, thereby obtaining information about the drill bit.Type: ApplicationFiled: April 1, 2021Publication date: June 1, 2023Inventors: Robert Nyström, Ulf Petersson, Fredrik Thorsell, Pär Berglund
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Publication number: 20230011888Abstract: The present disclosure relates to a floor surfacing machine (100) comprising drive wheels (171, 172) and a planetary head (140) with one or more satellite grinding heads (120), A first drive motor (110) is arranged to drive the planetary head (140) and a second drive motor (130, 430) is arranged to drive the one or more satellite grinding heads (120). The first drive motor (110) is arranged to be directly powered only by means of a re-chargeable internal electrical power source (310) comprised in the floor surfacing machine (100).Type: ApplicationFiled: October 29, 2020Publication date: January 12, 2023Inventors: Peter Lundgren, Ulf Petersson
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Publication number: 20220366207Abstract: A wireless identification tag for embedding into an electrically conductive surface of a rotatable work tool, the tag comprising at least a first and a second inductive planar loop having corresponding first and second terminals, wherein the first inductive planar loop and the second inductive planar loop are arranged in relation to a common plane and wherein the first inductive planar loop and the second inductive planar loop are arranged to cover separate areas of the common plane, where each area on the common plane is associated with a respective polarity of the magnetic flux normal to said plane.Type: ApplicationFiled: September 19, 2019Publication date: November 17, 2022Inventors: Fredrik Thorsell, Ulf Petersson, Robert Nyström
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Patent number: 11471013Abstract: Industrial vacuum cleaner configured for servicing at least one construction tool, said vacuum cleaner comprising a vacuum inlet, wherein said vacuum cleaner further comprises a controller and connected to said controller a wireless transceiver, a memory, and at least one location and/or orientation sensor configured for detection of vacuum cleaner location and/or localization of other objects in relation to the vacuum cleaner and wherein the vacuum cleaner further comprises means for propulsion controlled by said controller.Type: GrantFiled: May 21, 2021Date of Patent: October 18, 2022Assignee: HUSQVARNA ABInventors: Joakim Ed, Lars Gustafsson, Simon Andersson, Rajinder Mehra, Tommy Olsson, Ulf Petersson, Richard Bälter
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Publication number: 20210345844Abstract: Industrial vacuum cleaner configured for servicing at least one construction tool, said vacuum cleaner comprising a vacuum inlet, wherein said vacuum cleaner further comprises a controller and connected to said controller a wireless transceiver, a memory, and at least one location and/or orientation sensor configured for detection of vacuum cleaner location and/or localization of other objects in relation to the vacuum cleaner and wherein the vacuum cleaner further comprises means for propulsion controlled by said controller.Type: ApplicationFiled: May 21, 2021Publication date: November 11, 2021Inventors: Joakim Ed, Lars Gustafsson, Simon Andersson, Rajinder Mehra, Tommy Olsson, Ulf Petersson, Richard Bälter
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Patent number: 11089925Abstract: Industrial vacuum cleaner configured for servicing at least one construction tool (2), said vacuum cleaner (1) comprising a vacuum inlet (3), wherein said vacuum cleaner (1) further comprises a controller (8) and connected to said controller (8) a wireless transceiver (10), a memory (12), and at least one location and/or orientation sensor (11) configured for detection of vacuum cleaner location and/or localization of other objects in relation to the vacuum cleaner (1) and wherein the vacuum cleaner (1) further comprises means for propulsion (13) controlled by said controller (8).Type: GrantFiled: March 13, 2017Date of Patent: August 17, 2021Assignee: HUSQVARNA ABInventors: Joakim Ed, Lars Gustafsson, Simon Andersson, Rajinder Mehra, Tommy Olsson, Ulf Petersson, Richard Bälter
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Patent number: 10486250Abstract: An electric power saw/cutter includes a rotatable saw structure, a rear handle with a switch/speed control, a front handle, and a drive unit for rotating the saw structure. The drive unit includes a saw structure drive arrangement to which the saw structure is attachable, a transmission for driving the saw drive arrangement, an electric motor for driving an input shaft of the transmission, and a support structure for holding/carrying the saw structure drive arrangement. The transmission and the electric motor may be characterized in that the front handle and the rear handle are directly connected to each other to form a handle unit, which unit is resiliently connected to the drive unit, so that vibrations from the saw blade and drive unit will be reduced in the handle unit.Type: GrantFiled: April 19, 2017Date of Patent: November 26, 2019Assignee: HUSQVARNA ABInventors: Ulf Petersson, Bengt Allan Bergvall, Håkan Pinzani, Pär Carlsson, Adam Vidlund, Johan Berg, Anders Bennehag
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Publication number: 20190110651Abstract: Industrial vacuum cleaner configured for servicing at least one construction tool (2), said vacuum cleaner (1) comprising a vacuum inlet (3), wherein said vacuum cleaner (1) further comprises a controller (8) and connected to said controller (8) a wireless transceiver (10), a memory (12), and at least one location and/or orientation sensor (11) configured for detection of vacuum cleaner location and/or localization of other objects in relation to the vacuum cleaner (1) and wherein the vacuum cleaner (1) further comprises means for propulsion (13) controlled by said controller (8).Type: ApplicationFiled: March 13, 2017Publication date: April 18, 2019Inventors: Joakim Ed, Lars Gustafsson, Simon Andersson, Rajinder Mehra, Tommy Olsson, Ulf Petersson, Richard Bälter
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Publication number: 20170216941Abstract: An electric power saw/cutter includes a rotatable saw structure, a rear handle with a switch/speed control, a front handle, and a drive unit for rotating the saw structure. The drive unit includes a saw structure drive arrangement to which the saw structure is attachable, a transmission for driving the saw drive arrangement, an electric motor for driving an input shaft of the transmission, and a support structure for holding/carrying the saw structure drive arrangement. The transmission and the electric motor may be characterized in that the front handle and the rear handle are directly connected to each other to form a handle unit, which unit is resiliently connected to the drive unit, so that vibrations from the saw blade and drive unit will be reduced in the handle unit.Type: ApplicationFiled: April 19, 2017Publication date: August 3, 2017Inventors: Ulf Petersson, Bengt Allan Bergvall, Håkan Pinzani, Pär Carlsson, Adam Vidlund, Johan Berg, Anders Bennehag
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Patent number: 9656336Abstract: An electric power saw/cutter includes a rotatable saw structure, a rear handle with a switch/speed control, a front handle and a drive unit for rotating the saw structure. The drive unit itself including a saw structure drive arrangement to which the saw structure is attachable, a transmission for driving the saw drive arrangement, an electric motor for driving an input shaft of the transmission, and a support structure for holding/carrying the saw structure drive arrangement, the transmission and the electric motor. The front handle and the rear handle are directly connected to each other to form a handle unit, which unit is resiliently connected to the drive unit, so that vibrations from the saw blade and drive unit will be reduced in the handle unit.Type: GrantFiled: June 12, 2013Date of Patent: May 23, 2017Assignee: HUSQVARNA ABInventors: Ulf Petersson, Bengt Allan Bergvall, Håkan Pinzani, Pär Carlsson, Adam Vidlund, Johan Berg, Anders Bennehag
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Publication number: 20150151447Abstract: An electric power saw/cutter (1) comprising: a. a rotatable saw structure (2) b. a rear handle (5) with a switch/speed control (6) c. a front handle (7) d. a drive unit (8) for rotating the saw structure (2), the drive unit (8) itself comprising: e. a saw structure drive arrangement (9) to which the saw structure is attachable f. a transmission (10) for driving the saw drive arrangement (9) g. an electric motor (11) for driving an input shaft (12) of the transmission h. a support structure (13) for holding/carrying the saw structure drive arrangement (9), the transmission (10) and the electric motor (11), characterised in, that the front handle (7) and the rear handle (5) are directly connected to each other to form a handle unit (4), which unit is resiliently connected to the drive unit (8), so that vibrations from the saw blade (2) and drive unit (8) will be reduced in the handle unit (4).Type: ApplicationFiled: June 12, 2013Publication date: June 4, 2015Inventors: Ulf Petersson, Bengt Allan Bergvall, Håkan Pinzani, Pär Carlsson, Adam Vidlund, Johan Berg, Anders Bennehag
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Patent number: 8975852Abstract: An electric motor (100) having a motor control system (400) including: —a current measuring means (402) for directly or indirectly measuring the electric current in the rotor windings (7) providing a rotor current value/s, —an ambient temperature measuring/estimation means (404) for measuring or estimating the ambient air temperature providing an air temperature value/s, —a rotor temperature estimation means (406, 407, 408, 409, 410, 411) for estimating a rotor temperature at least based on the rotor current value/s and the air temperature value/s, and—a current limiting means (405) for preventing overheating/burning of the rotor assembly (3) by limiting the electric current to the rotor windings (7) when the estimated rotor temperature exceeds a predetermined overheating threshold (412).Type: GrantFiled: September 29, 2009Date of Patent: March 10, 2015Assignee: Husqvarna ABInventors: Ulf Petersson, Anders Erestam
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Patent number: 8732969Abstract: According to an embodiment, a leveling aid (102) for a drilling tool (100) is disclosed. The leveling aid (102) includes a mounting means adapted to be attached to the drilling tool (100). The leveling aid (102) further includes a level detecting device adapted to provide information of inclination of the mounting means. In particular, the level detecting device is suspended on the mounting means via a resilient assembly. The resilient assembly is adapted to absorb vibrations from the drilling tool (100) to the level detecting device.Type: GrantFiled: April 16, 2010Date of Patent: May 27, 2014Assignee: Husqvarna ABInventors: Anders Erestam, Ulf Petersson
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Publication number: 20130034395Abstract: According to an embodiment, a leveling aid (102) for a drilling tool (100) is disclosed. The leveling aid (102) includes a mounting means adapted to be attached to the drilling tool (100). The leveling aid (102) further includes a level detecting device adapted to provide information of inclination of the mounting means. In particular, the level detecting device is suspended on the mounting means via a resilient assembly. The resilient assembly is adapted to absorb vibrations from the drilling tool (100) to the level detecting device.Type: ApplicationFiled: April 16, 2010Publication date: February 7, 2013Applicant: HUSQVARNA ABInventors: Anders Erestam, Ulf Petersson
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Publication number: 20120299521Abstract: An electric motor (100) having a motor control system (400) including:—a current measuring means (402) for directly or indirectly measuring the electric current in the rotor windings (7) providing a rotor current value/s,—an ambient temperature measuring/estimation means (404) for measuring or estimating the ambient air temperature providing an air temperature value/s,—a rotor temperature estimation means (406, 407, 408, 409, 410, 411) for estimating a rotor temperature at least based on the rotor current value/s and the air temperature value/s, and—a current limiting means (405) for preventing overheating/burning of the rotor assembly (3) by limiting the electric current to the rotor windings (7) when the estimated rotor temperature exceeds a predetermined overheating threshold (412).Type: ApplicationFiled: September 29, 2009Publication date: November 29, 2012Applicant: HUSQVARNA ABInventors: Ulf Petersson, Anders Erestam
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Patent number: 8037948Abstract: A drilling machine includes a motor housing, a gear box housing, a shaft driven by the motor and extending into the gear box housing, a drilling shaft extending through the gear box housing and having an outgoing channel arranged in the drilling shaft for supply/removal of a drill flow medium to/from a tool part that is connectable to the drilling shaft, a drill flow medium room, between the motor housing and gear box housing, that can be supplied with drill flow medium when the drilling machine is in operation, and an incoming drill flow medium conduit for the supply/removal of the drill flow medium to/from the drill flow medium room. The motor housing includes a detachable end cover which forms the rear unit of the drilling machine. The gear box housing includes a detachable end cover that forms the front unit of the drilling machine.Type: GrantFiled: August 31, 2007Date of Patent: October 18, 2011Assignee: Husqvarna AktiebolagInventors: Mari Albinsson, Klas Nordgren, Ulf Petersson
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Publication number: 20100014932Abstract: A drilling machine includes a motor housing, a gear box housing, a shaft driven by the motor and extending into the gear box housing, a drilling shaft extending through the gear box housing and having an outgoing channel arranged in the drilling shaft for supply/removal of a drill flow medium to/from a tool part that is connectable to the drilling shaft, a drill flow medium room, between the motor housing and gear box housing, that can be supplied with drill flow medium when the drilling machine is in operation, and an incoming drill flow medium conduit for the supply/removal of the drill flow medium to/from the drill flow medium room. The motor housing includes a detachable end cover which forms the rear unit of the drilling machine. The gear box housing includes a detachable end cover that forms the front unit of the drilling machine.Type: ApplicationFiled: August 31, 2007Publication date: January 21, 2010Inventors: Mari Albinsson, Klas Nordgren, Ulf Petersson
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Patent number: 7613543Abstract: A method and an electronic search system for operating an automatic device, preferably an automatic lawnmower. The system comprises at least one first electrical cable (1,4,5,6) connected to at least one first signal generator (3,7,8) and at least one sensing system arranged on said device. Said sensing system detects at least one magnetic field being transmitted via said cable (1,4,5,6) and propagating through the air, the sensing system transmitting a processed signal to at least one driving element which contributes to the movements of said device in relation to a surface.Type: GrantFiled: June 3, 2003Date of Patent: November 3, 2009Assignee: Aktiebolaget ElectroluxInventors: Ulf Petersson, Bengt-Allan Bergvall
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Patent number: 7574282Abstract: The present disclosure relates to an arrangement and an electronic navigational control system for a self-propelling device (5), preferably a lawn-mowing robot. The system comprises at lease one navigational control system (3) connected to at least one signal generator (1) and a sensing unit arranged at the self-propelling device (5). The sensing unit senses at least one, in the air medium propagating, time and space varying magnetic field, at least transmitted via the navigational control station (3) and in turn retransmits at least one signal processed by the unit to at least one driving source which contributes to the device's movements across the surface. The system comprises structure by which the signal generator (1) sends a current through the navigational control station (3), the current generating the time and space varying magnetic field, whereby the sensing unit comprises structure by which the device (5) is maneuvered based on the properties of the sensed magnetic field.Type: GrantFiled: June 3, 2003Date of Patent: August 11, 2009Assignee: Husqvarna ABInventors: Ulf Petersson, Bengt-Allan Bergvall