Patents by Inventor Per-Stefan Gersbro

Per-Stefan Gersbro 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: 4848594
    Abstract: A device for contamination free and micro-organism penetration preventing, repeated access to a packaging container containing a pourable filling goods, for instance a sterile fluid or powder. A discharge portion forms a sluice space and is connectable into communication with a packaging container of a flexible material or a so called squeezable type container. At each end of the sluice chamber there are arranged closeable and openable valves or discharge openings. Between said valves or discharge openings there is said sluice chamber, which is of such a length that turbulence phenomena at the external valve do not propagate to the interior of the sluice.
    Type: Grant
    Filed: February 4, 1988
    Date of Patent: July 18, 1989
    Assignee: AB Akerlund & Rausing
    Inventors: Carl-Axel Bjorkengren, Magnus Bergstrom, Per-Stefan Gersbro
  • Patent number: 4811957
    Abstract: A device and a method for forming at least a liquid tight joint between two elements. Either or both elements have sealing portions, which in an area intended for abutment of the elements provide said joint when said elements are brought together in the abutment area. The sealing portion is formed as a seal which by being formed by sequential injection moulding technique is molecularly integral with an area directly adjacent to said seal. The injection moulding technique allows a choice of a relatively softer material for the sealing portion and a high degree of design freedom, including designs of high hygiene standards, especially well suited for aseptic or sterile packaging systems.
    Type: Grant
    Filed: December 1, 1987
    Date of Patent: March 14, 1989
    Assignee: AB Akerlund & Rausing
    Inventors: Magnus Bergstrom, Per-Stefan Gersbro, Jan-Olof Fransson