Patents by Inventor Jan Backlund

Jan Backlund 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).

  • Method for machining and forming a transcurrent opening in a fiber-reinforced composite material
    Patent number: 6200197
    Abstract: The invention relates to a method for machining and forming transcurrent openings in fibre-reinforced composite materials. Openings with damage-free edges can be formed with high precision by positioning a rotating grinding tool in a preformed hole. In conjunction with this the material is arranged in such a way that the axis of rotation of the grinding tool is essentially perpendicular to the longitudinal direction of the fibres at the edge of the hole. The opening is machined and formed by causing the grinding tool on the one hand to rotate about its own axis and on the other hand to describe an orbital motion relative to the edge of the hole. Any damage/defects caused in the course of preforming are removed in this way.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: March 13, 2001
    Assignee: AB Strukturteknologier i Stockholm
    Inventors: Ingvar Eriksson, Jan Bäcklund, Leif Zackrisson
  • Method for producing holes in fibre reinforced composites
    Patent number: 5641252
    Abstract: The invention relates to a method for producing a hole in a workpiece consisting of a fibre-reinforced composite material. The central axis of the hole passes through a predetermined point on the surface of the workpiece and is oriented in a certain determined direction in relation to the longitudinal directions of the fibres in the immediate vicinity of the point. The material is machined simultaneously in both an axial and a radial sense by causing the tool to describe an axial motion and to rotate not only about its own axis (5), but also eccentrically about the central axis.
    Type: Grant
    Filed: June 23, 1995
    Date of Patent: June 24, 1997
    Assignee: Novator AB
    Inventors: Ingvar Eriksson, Jan Backlund, Leif Zackrisson
  • Method for the vertical manufacture of sandwich structural elements
    Patent number: 5114524
    Abstract: Method and apparatus for manufacturing so-called sandwich structural elements in laminated materials, where a core (10) is provided with a covering layer (18) on at least one side. The core in the form of a solid or expandable material is advanced from above and downwards in a substantially vertical path, and the covering layer or layers (18) are pressed against, and joined to the core during continued vertical advance thereof from above and downwards.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: May 19, 1992
    Inventors: Paul Svensson, Christer Nilsson, Jan Backlund, Karl G. Ericsson, Leif Jilken, Harry Kihlberg
  • Method for the vertical manufacture of sandwich structural elements
    Patent number: 4961810
    Abstract: Method and apparatus for manufacturing so-called sandwich structural elements in laminated materials, where a core (10) is provided with a covering layer (18) on at least one side. The core in the form of a solid or expandable material is advanced from above and downwards in a substantially vertical path, and the covering layer or layers (18) are pressed against, and joined to the core during continued vertical advance thereof from above and downwards.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: October 9, 1990
    Inventors: Paul Svensson, Christer Nilson, Jan Backlund, Karl G. Ericsson, Leif Jilken, Harry Kihlberg