Patents by Inventor Peter Fröberg

Peter Fröberg 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).

  • Radiation therapy device
    Patent number: 6968036
    Abstract: A radiation therapy device and a method of changing the spatial dose distribution surrounding a focus are disclosed. A subset of radioactive sources in a source carrier arrangement is displaceable relatively to collimator passage inlets, while the rest of the sources are fixed relatively to said collimator passage inlets.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: November 22, 2005
    Assignee: Elekta AB
    Inventors: Per Carlsson, Gert Hanner, Ivars Alksnis, Anders Nilsson, Peter Fröberg
  • Radiation therapy device
    Patent number: 6931096
    Abstract: A radiation therapy device and a method of changing the spatial dose distribution surrounding a focus are disclosed. At least a subset of the radioactive sources in a source carrier is linearly displaceable relatively to at least a subset of collimator passage inlets, or vice versa.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: August 16, 2005
    Assignee: Elekta AB
    Inventors: Per Carlsson, Gert Hanner, Ivars Alksnis, Anders Nilsson, Peter Fröberg
  • Device for coupling a work piece to a machine tool
    Patent number: 6609851
    Abstract: Disclosed is a coupling device having two coupling parts and clamping means for releasably axially clamping both coupling parts. A plurality of circumferentially spaced non parallel grooves are cut into the surface of one of both coupling parts for having a reference in a plane perpendicular to the clamping direction. Pins project from the surface of the other coupling part each pin having two opposing parallel lateral surfaces for obtaining alignment of the grooves with the pins upon clamping. At least one of the lateral surfaces of each pin forms an angle with the associated flank of each groove upon axial alignment of the coupling parts. For improving the repeated precision of the positioning of one of the coupling parts relative to the other coupling part even upon high stress on one of the coupling parts in circumferential direction a clamping plate is provided between the lateral surface and the associated flank which is axially elastic and is mounted to one of the coupling parts.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: August 26, 2003
    Assignee: System 3R International AB
    Inventors: Hakon Nordquist, Dan Holm, Hans Hellman, Peter Fröberg
  • Tool holder
    Patent number: 6467826
    Abstract: An essentially C-shaped tool holder (10), preferably having a long inner edge, which holder at its free shank ends can carry a tool such as a riveting, glueing or welding unit. The holder (10) comprises a truss or frame work which includes an outer and an inner C-shaped frame (11, 23) and a plurality of slewing brackets (27-32) connected to the C-shaped frames. The frames (11, 23) and the slewing brackets (27-32) are arranged to form a number of connected triangular sections, defined by connection points 18-22, 37) which are designed as intersections or joints. The outer C-shaped frame (11) is arranged to support only thrust forces; the inner frame (23) is arranged to support thrust and tensile forces, and the slewing brackets (27-32) are arranged substantially to support tensile forces.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: October 22, 2002
    Assignee: C-Power AB
    Inventors: Karl-Otto Strömberg, Hans Hellman, Dan Holm, Peter Fröberg