Patents by Inventor Hans Persson

Hans Persson 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: 20030183334
    Abstract: A process for the manufacture of a decorative boards, which boards includes a decorative layer, wherein a decor sheet is placed as a surface layer on a base layer and bonded thereto by pressing under elevated temperature and pressure. The decor sheet is cut to a predetermined format from a web, the cut being arranged on a fixed position related to possible repetition frequency of a decor pattern of the web. The decor sheet is then accurately placed on a base layer with a predetermined format. The decor sheet is spot welded to the base layer. A number of such base layers with attached decor sheets are then, one after the other, fed in between the belts of a continuous laminate press, optionally together with an uppermost wear layer. The base layers, the decor sheets and possibly the optional wear layer is then laminated together under heat and pressure in the laminate press.
    Type: Application
    Filed: March 27, 2003
    Publication date: October 2, 2003
    Inventors: Ake Sjoberg, Fredrik Fackler, Hans Persson, Tomas Stjernberg, Patricio Villarroel, Roger Johansson, Anders Karlsson
  • Patent number: 6568333
    Abstract: A protecting device for a wheel axle of a rail vehicle is intended to be arranged on the axle (1, 9, 13). The protecting device has the form of a cylindrical pipe with at least one slot (4, 10, 17) extending from one end of the pipe to the other.
    Type: Grant
    Filed: January 7, 2002
    Date of Patent: May 27, 2003
    Assignee: Bombardier Transportation GmbH
    Inventors: Camilla Kontio, Hans Persson, Mats Karlsson
  • Patent number: 6443508
    Abstract: A device for interlocking two disc-like parts (2, 3) comprises a locking element (4), which presents first locking means (5) for fixing the locking element to a first one (3) of the parts, and second locking means (6) for fixing the second one (3) of the parts in relation to the locking element, and thereby in relation to the first part (2) as the latter and the locking element are interconnected. The first locking means (5) of the locking element and the first part (2) comprise a first set of first and second locking members (6′, 7) engaging each other. These first and second locking members are designed as a projection (6′) and a recess (7), respectively. These are mobile into engagement with each other in a direction (R1) which forms an angle that is preferably generally perpendicular in relation to the plane (3) of the first part (2).
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: September 3, 2002
    Assignee: Nefab AB
    Inventor: Hans Persson
  • Patent number: 5007959
    Abstract: A process for the production of blister copper from high-grade copper matte or similar copper sulphide comprises the steps of solidifying and cooling molten copper matte produced in a primary smelting furnace followed by crushing of the solidified matte if necessary to produce a coarse solid matte less than about fifteen centimeters in size, heating a bath smelting reactor to a temperature at which converting reactions take place and providing a bath of molten copper, continuously feeding measured quantities of coarse solid matte and flux into the bath smelting reactor, continously introducing sufficient quantities of oxygen or oxygen enriched air through submerged fluid protected tuyeres such that the iron and sulphur present in the copper matte are oxidized, and periodically withdrawing molten blister copper, liquid slag and continously withdrawing off-gas from the bath smelting reactor.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: April 16, 1991
    Assignee: Noranda Inc.
    Inventors: Marc Reist, Hans Persson, Daniel Poggi
  • Patent number: 4896865
    Abstract: Expansive forces in a furnace of cylindrical shape (e.g. a ladle furnace) are absorbed by means of a metallic ring positioned in the bottom of the furnace which substantially fits the inner, lower side wall of the cylindrical steel shell of the furnace and absorbs the expansive forces directed against this side wall.
    Type: Grant
    Filed: April 23, 1987
    Date of Patent: January 30, 1990
    Assignee: ASEA Aktiebolag
    Inventor: Hans Persson
  • Patent number: 4573335
    Abstract: A hydraulic press with a pressure cell comprises a tray-shaped press plate with a bag-like diaphragm and a forming rubber pad and a press tray for a forming tool and a workpiece. The end wall portions projecting from the mid portions of each of the press plate and from the base of the press tray, provide thickness transitions which define a cavity in the operating position of the press tray. Between the press plate and/or the base of the press tray and the confronting force-absorbing surfaces of the yokes of the press frame of the press, play is provided in a portion above and below, respectively, the thickness transitions. This play allows the high stress levels which would otherwise arise at the thickness transitions to be reduced.
    Type: Grant
    Filed: January 18, 1985
    Date of Patent: March 4, 1986
    Assignee: ASEA Aktiebolag
    Inventor: Hans Persson
  • Patent number: 4149399
    Abstract: In a method of forming tubes or pipes from a flat blank of a plastically deformable material, three spaced apart portions of the blank are first bent to the wanted curvature of the finished tube or pipe, so that two smaller unbent portions are obtained between the curved portions. Then, the blank is closed to essentially tubular form by means of forces acting on the curved portions, so that the principal deformation in connection with the closing is obtained in the unbent portions located between the curved portions.
    Type: Grant
    Filed: January 9, 1978
    Date of Patent: April 17, 1979
    Assignee: AB Carbox
    Inventors: Hans Persson, Jan-Erik Soderstrom
  • Patent number: D465720
    Type: Grant
    Filed: December 18, 2000
    Date of Patent: November 19, 2002
    Assignee: Nefab AB
    Inventor: Hans Persson
  • Patent number: D421562
    Type: Grant
    Filed: July 28, 1998
    Date of Patent: March 14, 2000
    Assignee: NEFAB AB
    Inventor: Hans Persson