Patents by Inventor Alf Forssberg

Alf Forssberg 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).

  • Seal device
    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