Patents by Inventor Fredrik Ahrentorp

Fredrik Ahrentorp 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).

  • Device and method for indicating if a fastening element has reached a tensile yield limit load
    Patent number: 8910526
    Abstract: A device and method for indicating if a fastening element upon fastening to a piece has reached a tensile yield limit load. The fastening element includes a threaded shaft having a magnetostrictive material. The device includes a mechanism for generating an alternating magnetic field that penetrates the shaft, a mechanism for measuring a physical quantity that depends on the momentary magnetic susceptibility of the shaft and a control unit adapted to detect a significant change of the physical quantity and determine and indicate if the shaft of the fastening element has reached the tensile yield limit load.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: December 16, 2014
    Assignee: Rocan System AB
    Inventors: Rolf Carlsson, Christer Johansson, Fredrik Ahrentorp, Christian Jonasson, Jakob Blomgren
  • COIL COMPRISING A WINDING COMPRISING A MULTI-AXIAL CABLE
    Publication number: 20130134964
    Abstract: The present invention relates to a coil comprising a winding (45). The winding comprises a multi-axial cable with one shielding layer connected to ground.
    Type: Application
    Filed: May 20, 2011
    Publication date: May 30, 2013
    Applicant: IMEGO AB
    Inventors: Fredrik Ahrentorp, Jakob Blomgren, Christian Jonasson, Andrea Prieto-Astalan, Christer Johansson
  • DEVICE AND METHOD FOR INDICATING IF A FASTENING ELEMENT HAS REACHED A TENSILE YIELD LIMIT LOAD
    Publication number: 20130074606
    Abstract: A device and method for indicating if a fastening element upon fastening to a piece has reached a tensile yield limit load. The fastening element includes a threaded shaft having a magnetostrictive material. The device includes a mechanism for generating an alternating magnetic field that penetrates the shaft, a mechanism for measuring a physical quantity that depends on the momentary magnetic susceptibility of the shaft and a control unit adapted to detect a significant change of the physical quantity and determine and indicate if the shaft of the fastening element has reached the tensile yield limit load.
    Type: Application
    Filed: June 8, 2011
    Publication date: March 28, 2013
    Applicant: ROCAN SYSTEM AB
    Inventors: Rolf Carlsson, Christer Johansson, Fredrik Ahrentorp, Christian Jonasson, Jakob Blomgren