Patents by Inventor Lars Hakansson

Lars Hakansson 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).

  • Patent number: 7340985
    Abstract: A device and method for vibration control in a machine for cutting, said machine comprising a cutting tool supported by a tool holder. The device comprises a control unit and converting means which are connectible to the control unit and comprise a vibration sensor and an actuator. The actuator comprises an active element which converts an A.C. voltage supplied by the control unit to the actuator into dimensional changes. Said active element is adapted to be embedded in the body of the tool holder and in such manner that said dimensional changes impart bending to the body of the tool holder.
    Type: Grant
    Filed: November 29, 2004
    Date of Patent: March 11, 2008
    Assignee: Staffansboda Compagnie AB
    Inventors: Ingvar Claesson, Thomas Lago, Lars Hakansson
  • Patent number: 7234379
    Abstract: An arrangement for reducing vibrations in a tool holder (4) with a cutting tool (3) and has a vibration sensor on the tool holder (4) that is connected to a guide unit (11). The tool holder (4) has further two piezo-electric actuators 14 and 15. Under the influence of the vibration sensor (9), the guide unit (11) provides an electric alternating current that is actively guided over time so that the actuators movably affect the tool holder (4) to reduce the vibrations in this. To also be able to dampen transients in the tool holder (4) this is movably connected with a passive dampening arrangement that is independent of the guide unit (11) and that is based on the principle of a springing (8) suspended mass (7). The invention also relates to a method for reducing vibrations. The vibrations in the tool holder are sensed and a corresponding signal is provided to a guide unit that over time provides actively guided signals to the actuators.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: June 26, 2007
    Inventors: Ingvar Claesson, Lars Hakansson, Thomas Lago, Rolf Zimmergen, Göran H{dot over (a)}llstedt
  • Publication number: 20060291973
    Abstract: An arrangement for reducing vibrations in a tool holder (4) with a cutting tool (3) and has a vibration sensor on the tool holder (4) that is connected to a guide unit (11). The tool holder (4) has further two piezo-electric actuators 14 and 15. Under the influence of the vibration sensor (9), the guide unit (11) provides an electric alternating current that is actively guided over time so that the actuators movably affect the tool holder (4) to reduce the vibrations in this. To also be able to dampen transients in the tool holder (4) this is movably connected with a passive dampening arrangement that is independent of the guide unit (11) and that is based on the principle of a springing (8) suspended mass (7). The invention also relates to a method for reducing vibrations. The vibrations in the tool holder are sensed and a corresponding signal is provided to a guide unit that over time provides actively guided signals to the actuators.
    Type: Application
    Filed: June 28, 2005
    Publication date: December 28, 2006
    Inventors: Ingvar Claesson, Lars Hakansson, Thomas Lago, Rolf Zimmergen, Goran Hallstedt
  • Patent number: 6925915
    Abstract: A device increases the surface smoothness of a turned surface. The device comprising a control system with a control unit and an actuator connectible to the control unit and connectible with a tool holder. The actuator in adapted to impart a vibrating motion in the lateral direction to the tool holder. A method will also increase the surface smoothness of a turned surface, comprising the step of controlling the vibrations of the tool holder during turning. The method also comprises the step of imparting a vibrating motion in the lateral direction to the tool holder. Moreover, a turning lathe and a turning tool holder which like the device are designed to generate vibrating motion in the lateral direction.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: August 9, 2005
    Assignee: Staffansboda Compagnie AB
    Inventors: Ingvar Claesson, Thomas Lago, Lars Hakansson
  • Publication number: 20050109174
    Abstract: A device and method for vibration control in a machine for cutting, said machine comprising a cutting tool supported by a tool holder. The device comprises a control unit and converting means which are connectible to the control unit and comprise a vibration sensor and an actuator. The actuator comprises an active element which converts an A.C. voltage supplied by the control unit to the actuator into dimensional changes. Said active element is adapted to be embedded in the body of the tool holder and in such manner that said dimensional changes impart bending to the body of the tool holder.
    Type: Application
    Filed: November 29, 2004
    Publication date: May 26, 2005
    Applicant: STAFFANSBODA COMPAGNIE AB
    Inventors: Ingvar Claesson, Thomas Lago, Lars Hakansson
  • Patent number: 6694213
    Abstract: A device for vibration control in a machine for internal turning uses a cutting tool supported by a tool holder, and has a control unit, a vibration sensor connectible to the control unit, and an actuator connectible to the control unit. The actuator has an active element, which converts an A.C. voltage supplied by the control unit to the actuator into dimensional changes. The active element is adapted to be embedded in the body of the tool holder, and is adapted to be embedded in such a manner that the dimensional changes impart bending to the body of the tool holder. A method for vibration control in internal turning and a tool holder for internal turning are provided.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: February 17, 2004
    Inventors: Ingvar Claesson, Thomas Lago, Lars Hakansson
  • Publication number: 20020036091
    Abstract: The present invention relates to a device for vibration control in a machine for internal turning, said machine comprising a cutting tool supported by a tool holder, the device comprising a control unit, a vibration sensor connectible to the control unit, and an actuator connectible to the control unit, and the actuator comprising an active element, which converts an A.C. voltage supplied by the control unit to the actuator into dimensional changes. Said active element is adapted to be embedded in the body of the tool holder, and is adapted to be embedded in such manner that said dimensional changes impart bending to the body of the tool holder.
    Type: Application
    Filed: April 20, 2001
    Publication date: March 28, 2002
    Inventors: Ingvar Claesson, Thomas Lago, Lars Hakansson
  • Publication number: 20020033083
    Abstract: The invention relates to a device for vibration control in a machine for cutting, said machine comprising a cutting tool supported by a tool holder. The device comprises a control unit and converting means which are connectible to the control unit and comprise a vibration sensor and an actuator. The actuator comprises an active element which converts an A.C. voltage supplied by the control unit to the actuator into dimensional changes. Said active element is adapted to be embedded in the body of the tool holder and in such manner that said dimensional changes impart turning moments to the body of the tool holder.
    Type: Application
    Filed: April 20, 2001
    Publication date: March 21, 2002
    Inventors: Ingvar Claesson, Thomas Lago, Lars Hakansson
  • Patent number: D760529
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: July 5, 2016
    Assignee: OBH Nordica IP A/S
    Inventor: Lars Hakansson
  • Patent number: D778439
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: February 7, 2017
    Assignee: CONROY MEDICAL AB
    Inventors: Lars Håkansson, Anders Krook, Erik Verrier
  • Patent number: D798815
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: October 3, 2017
    Assignee: CONROY MEDICAL AB
    Inventors: Lars Håkansson, Anders Krook, Erik Verrier
  • Patent number: D943040
    Type: Grant
    Filed: December 1, 2020
    Date of Patent: February 8, 2022
    Inventors: Olov Nyquist, Christoffer Carnmark, Mikaela Lagebjer Kekkonen, Alina Larm, Lars Håkansson