Patents by Inventor Johan Bratthall

Johan Bratthall 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 arrangement
    Patent number: 6446975
    Abstract: The invention concerns a seal device for a submersible machine, such as a pump or a mixer. The seal device is designed as an easily replaceable unit comprising two mechanical face seals (4,6) and (5,7) resp. with an intermediate room for a barrier liquid in which a pump for circulation of said liquid is arranged. A spring housing (10) which serves as a uniting means for the seal device is provided with connecting means for the rotary seal rings (4) and (5) resp. and acts as a hub for impeller vanes (16) in said circulation pump.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: September 10, 2002
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventor: Johan Bratthall
  • Clamping spring ring
    Patent number: 6345928
    Abstract: The invention concerns a device for mutual locking of two concentric cylindrical parts such as parts to be used in a submersible pump unit. One outer part (10) and two inner parts (6) and (7) are locked mutually by help of a circumferential locking element (12) having resilient abilities and which is arranged at the intersectional point between the three parts (6), (7) and (10).
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: February 12, 2002
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventors: Johan Bratthall, Borje Stahl, Lars Ogren
  • Pump
    Patent number: D834067
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: November 20, 2018
    Assignee: XYLEM IP MANAGEMENT S.A R.L.
    Inventors: Borje Stahl, Johan Bratthall
  • Pump
    Patent number: D834619
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: November 27, 2018
    Assignee: XYLEM IP MANAGEMENT S.A R.L.
    Inventors: Borje Stahl, Johan Bratthall, Viktor Bredwad