Patents by Inventor Boris Fredriksson

Boris Fredriksson 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: 6224354
    Abstract: The invention concerns a device for a submersible machine, such as a pump, a turbine or a mixer. The machine includes a driving unit (1) and a hydraulic unit (2) having an impeller connected to the driving unit via a rotary shaft (3). In order to prevent the medium in the hydraulic unit from entering the driving unit along the driving shaft, an intermediate seal device is arranged. The seal device includes two mechanical face seals (5) and (6) and an intermediate room (7) containing barrier liquid. In order to prevent possible leaking barrier liquid from damaging the shaft bearing (4), a storage tank (9) for collecting said liquid is arranged within the room (7).
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: May 1, 2001
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventors: Bengt-Ake Brandt, Boris Fredriksson
  • Patent number: 5181729
    Abstract: Two identical mechanical seals (6, 7) and (8, 9) respectively and an intermediate spring device (17) are arranged in a holder which is easily replaceable. The spring (17) is common for the two seals and is connected to sockets (13) and (14) respectively which anchor the rotating seal rings (6) and (8) respectively. The oil containment area (20) of the machine is connected to the area containing the spring (17).
    Type: Grant
    Filed: August 26, 1991
    Date of Patent: January 26, 1993
    Assignee: ITT Flygt AB
    Inventors: Alf Forssberg, Boris Fredriksson
  • Patent number: 4494758
    Abstract: A device for transporting lubricant to the mechanical sealds in a submersible machine includes a funnel shaped guide means arranged on a rotating shaft in an oil room. Oil will be sucked in at the small end of the guide means and flow out at its big end thus obtaining a transport of oil.
    Type: Grant
    Filed: March 22, 1984
    Date of Patent: January 22, 1985
    Assignee: ITT Industries, Inc.
    Inventors: Valdemar Carlsson, Boris Fredriksson
  • Patent number: D284380
    Type: Grant
    Filed: May 24, 1983
    Date of Patent: June 24, 1986
    Assignee: ITT Industries, Inc.
    Inventors: Kurt Berg, Boris Fredriksson, Bengt Ramstrom, Bengt Sodergard