Patents by Inventor Jens Steffen

Jens Steffen 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).

  • Publication number: 20160143500
    Abstract: A mobile robot system is provided that includes a docking station having at least two pose-defining fiducial markers. The pose-defining fiducial markers have a predetermined spatial relationship with respect to one another and/or to a reference point on the docking station such that a docking path to the base station can be determined from one or more observations of the at least two pose-defining fiducial markers. A mobile robot in the system includes a pose sensor assembly. A controller is located on the chassis and is configured to analyze an output signal from the pose sensor assembly. The controller is configured to determine a docking station pose, to locate the docking station pose on a map of a surface traversed by the mobile robot and to path plan a docking trajectory.
    Type: Application
    Filed: November 20, 2015
    Publication date: May 26, 2016
    Inventors: Philip Fong, Jason Meltzer, Jens-Steffen Gutmann, Vazgen Karapetyan, Mario E. Munich
  • Publication number: 20160035223
    Abstract: Aspects of the disclosure relate to determining whether a vehicle should continue through an intersection. For example, the one or more of the vehicle's computers may identify a time when the traffic signal light will turn from yellow to red. The one or more computers may also estimate a location of a vehicle at the time when the traffic signal light will turn from yellow to red. A starting point of the intersection may be identified. Based on whether the estimated location of the vehicle is at least a threshold distance past the starting point at the time when the traffic signal light will turn from yellow to red, the computers can determine whether the vehicle should continue through the intersection.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 4, 2016
    Inventors: Jens-Steffen Ralf Gutmann, Andreas Wendel, Nathaniel Fairfield, Dmitri A. Dolgov, Donald Jason Burnette
  • Patent number: 9250081
    Abstract: Vector Field SLAM is a method for localizing a mobile robot in an unknown environment from continuous signals such as WiFi or active beacons. Disclosed is a technique for localizing a robot in relatively large and/or disparate areas. This is achieved by using and managing more signal sources for covering the larger area. One feature analyzes the complexity of Vector Field SLAM with respect to area size and number of signals and then describe an approximation that decouples the localization map in order to keep memory and run-time requirements low. A tracking method for re-localizing the robot in the areas already mapped is also disclosed. This allows to resume the robot after is has been paused or kidnapped, such as picked up and moved by a user. Embodiments of the invention can comprise commercial low-cost products including robots for the autonomous cleaning of floors.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: February 2, 2016
    Assignee: iRobot Corporation
    Inventors: Jens-Steffen Gutmann, Dhiraj Goel, Mario E. Munich
  • Patent number: 9221326
    Abstract: A drive system (DS) for a land craft comprises a machine system (M1, M2) for driving the land craft, the machine system comprising at least a first and a second electric machine (M1, M2) acting on a common drive shaft (S) for driving the land craft, and a control device (PE, PE1, PE2) which is adapted to control the machine system for operating in at least two rotating speed operation ranges (OR1, OR2) with different rotating speeds of the drive shaft (S). The first electric machine (MI) is controlled to operate in both rotating speed operation ranges (OR1, OR2) to provide a first drive torque, and the second electric machine (M2) is controlled to operate in only one of the rotating speed operation ranges (OR1) to provide a second drive torque in addition to the first drive torque.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: December 29, 2015
    Assignee: L-3 COMMUNICATIONS MAGNET-MOTOR GMBH
    Inventors: Jens Steffen, Roland Hagenlocher, Peter Ehrhart, Harald Tamm
  • Publication number: 20150076959
    Abstract: The invention relates to a method of producing a rotor (10) of an electric machine, the rotor (10) comprising a rotor body (14) adapted to be rotated about a rotor axis (A) as well as at least one rotor component (16) to be mounted to the rotor body (14), said method comprising the steps of: arranging the rotor component (16) on the rotor body (14) and winding a wire-like structure (20) around an outer circumference (12) of the rotor body having the rotor component (16) arranged thereon so as to form a bandage (18), with the wire-like structure (20) during winding thereof being held under an adjustable bias.
    Type: Application
    Filed: December 6, 2011
    Publication date: March 19, 2015
    Applicant: L-3 Communications Magnet-Motor GmbH
    Inventors: Peter Ehrhart, Jens Steffen, Anton Mueller
  • Publication number: 20140051544
    Abstract: A drive system (DS) for a land craft comprises a machine system (M1, M2) for driving the land craft, the machine system comprising at least a first and a second electric machine (M1, M2) acting on a common drive shaft (S) for driving the land craft, and a control device (PE, PE1, PE2) which is adapted to control the machine system for operating in at least two rotating speed operation ranges (OR1, OR2) with different rotating speeds of the drive shaft (S). The first electric machine (Ml) is controlled to operate in both rotating speed operation ranges (OR1, OR2) to provide a first drive torque, and the second electric machine (M2) is controlled to operate in only one of the rotating speed operation ranges (OR1) to provide a second drive torque in addition to the first drive torque.
    Type: Application
    Filed: March 14, 2012
    Publication date: February 20, 2014
    Applicant: L-3 Communications Magnet-Motor GmbH
    Inventors: Jens Steffen, Roland Hagenlocher, Peter Ehrhart, Harald Tamm
  • Publication number: 20140031980
    Abstract: Vector Field SLAM is a method for localizing a mobile robot in an unknown environment from continuous signals such as WiFi or active beacons. Disclosed is a technique for localizing a robot in relatively large and/or disparate areas. This is achieved by using and managing more signal sources for covering the larger area. One feature analyzes the complexity of Vector Field SLAM with respect to area size and number of signals and then describe an approximation that decouples the localization map in order to keep memory and run-time requirements low. A tracking method for re-localizing the robot in the areas already mapped is also disclosed. This allows to resume the robot after is has been paused or kidnapped, such as picked up and moved by a user. Embodiments of the invention can comprise commercial low-cost products including robots for the autonomous cleaning of floors.
    Type: Application
    Filed: November 9, 2012
    Publication date: January 30, 2014
    Inventors: Jens-Steffen Gutmann, Dhiraj Goel, Mario E. Munich
  • Publication number: 20130138246
    Abstract: Vector Field SLAM is a method for localizing a mobile robot in an unknown environment from continuous signals such as WiFi or active beacons. Disclosed is a technique for localizing a robot in relatively large and/or disparate areas. This is achieved by using and managing more signal sources for covering the larger area. One feature analyzes the complexity of Vector Field SLAM with respect to area size and number of signals and then describe an approximation that decouples the localization map in order to keep memory and run-time requirements low. A tracking method for re-localizing the robot in the areas already mapped is also disclosed. This allows to resume the robot after is has been paused or kidnapped, such as picked up and moved by a user. Embodiments of the invention can comprise commercial low-cost products including robots for the autonomous cleaning of floors.
    Type: Application
    Filed: November 9, 2012
    Publication date: May 30, 2013
    Inventors: Jens-Steffen Gutmann, Dhiraj Goel, Mario E. Munich
  • Publication number: 20130138247
    Abstract: Vector Field SLAM is a method for localizing a mobile robot in an unknown environment from continuous signals such as WiFi or active beacons. Disclosed is a technique for localizing a robot in relatively large and/or disparate areas. This is achieved by using and managing more signal sources for covering the larger area. One feature analyzes the complexity of Vector Field SLAM with respect to area size and number of signals and then describe an approximation that decouples the localization map in order to keep memory and run-time requirements low. A tracking method for re-localizing the robot in the areas already mapped is also disclosed. This allows to resume the robot after is has been paused or kidnapped, such as picked up and moved by a user. Embodiments of the invention can comprise commercial low-cost products including robots for the autonomous cleaning of floors.
    Type: Application
    Filed: November 9, 2012
    Publication date: May 30, 2013
    Inventors: Jens-Steffen Gutmann, Philip Fong, Mario E. Munich
  • Publication number: 20120319526
    Abstract: An electric machine comprises a rotor (200) equipped with permanent magnets (204, 206, 208, 210), and a stator (100) equipped with electromagnetic poles. The electric machine is characterized in that several adjacent electromagnetic poles respectively constitute an electromagnetic pole group in which the adjacent electromagnetic poles are spaced apart at a first electromagnetic pole spacing, that adjacent electromagnetic poles belonging to different electromagnetic pole groups are spaced apart at an electromagnetic pole spacing greater than said first electromagnetic pole spacing, that each electromagnetic pole group has an even number of electromagnetic poles, and that adjacent electromagnetic poles of an electromagnetic pole group are linked to each other so as to generate magnetic fields of opposite direction in operation.
    Type: Application
    Filed: November 29, 2010
    Publication date: December 20, 2012
    Inventors: Roland Hagenlocher, Jens Steffen, Anton Müller, Peter Ehrhart
  • Patent number: 7315099
    Abstract: An electric drive unit for a motor vehicle, comprising: (a) a stub axle; (b) an electric motor having a stator that is fixed with respect to the stub axle and having a rotor that is rotatably supported with respect to the stub axle; (c) a gear system having its input connected to the rotor for torque transmission; (d) a wheel carrier that is rotatably supported with respect to the stub axle and is connected to the output of the gear system for torque transmission; characterized in (e) that air cooling with air circulation is provided for cooling the rotor of the electric motor; (f) and in that the electric motor has provided therein a heat sink for taking up heat from the circulating air.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: January 1, 2008
    Assignee: Magnet-Motor Gesellschaft fuer mangnetmotorische Technik mbH
    Inventors: Jens Steffen, Roland Hagenlocher, Fritz Walter, Anton Müller, Peter Ehrhart
  • Patent number: 7214155
    Abstract: An electric drive unit for a motor vehicle comprises an electric motor having a motor housing, a stator mounted in the motor housing and having coil-wound poles, a rotor arranged internally of the stator with an air gap present between the stator and the rotor, and a planetary gear system having a sun wheel, a planet carrier, planet wheels and a ring gear. The planet wheels have a maximum diameter and axial positioning that an imaginary common envelope cylinder for all maximum diameters of the planet wheels is located radially inside of the winding heads present on one axial side of the stator and axially beside the portion of the rotor adjoining the air gap and that the planet wheels project in axial direction outwardly beyond said winding heads either not at all or with less than 50% of their tooth width in engagement with the sun wheel.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: May 8, 2007
    Assignee: Magnet-Motor Gesellschaft fuer magnetmotorische Technik mbH
    Inventors: Anton Mueller, Fritz Walter, Peter Ehrhart, Jens Steffen
  • Publication number: 20050245341
    Abstract: An electric drive unit for a motor vehicle comprises an electric motor having a motor housing, a stator mounted in the motor housing and having coil-wound poles, a rotor arranged internally of the stator with an air gap present between the stator and the rotor, and a planetary gear system having a sun wheel, a planet carrier, planet wheels and a ring gear. The planet wheels have a maximum diameter and axial positioning that an imaginary common envelope cylinder for all maximum diameters of the planet wheels is located radially inside of the winding heads present on one axial side of the stator and axially beside the portion of the rotor adjoining the air gap and that the planet wheels project in axial direction outwardly beyond said winding heads either not at all or with less than 50% of their tooth width in engagement with the sun wheel.
    Type: Application
    Filed: January 28, 2005
    Publication date: November 3, 2005
    Applicant: Magnet-Motor Gesellschaft fuer magnetmotorische Technik mbH
    Inventors: Anton Mueller, Fritz Walter, Peter Ehrhart, Jens Steffen
  • Publication number: 20050206250
    Abstract: An electric drive unit for a motor vehicle, comprising: (a) a stub axle; (b) an electric motor having a stator that is fixed with respect to the stub axle and having a rotor that is rotatably supported with respect to the stub axle; (c) a gear system having its input connected to the rotor for torque transmission; (d) a wheel carrier that is rotatably supported with respect to the stub axle and is connected to the output of the gear system for torque transmission; characterized in (e) that air cooling with air circulation is provided for cooling the rotor of the electric motor; (f) and in that the electric motor has provided therein a heat sink for taking up heat from the circulating air.
    Type: Application
    Filed: January 28, 2005
    Publication date: September 22, 2005
    Applicant: Magnet-Motor Gesellschaft fuer
    Inventors: Jens Steffen, Roland Hagenlocher, Fritz Walter, Anton Muller, Peter Ehrhart