Patents by Inventor Seppo Kupiainen

Seppo Kupiainen 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).

  • Control system for a vacuum pump used for removing liquid and a method of controlling said pump
    Patent number: 6592340
    Abstract: A control system for a vacuum pump used for removing liquid from a suction washer of a pulp mill includes a pump with adjustable rotation speed and means for defining the operating point of the vacuum pump and a control/central unit wherein the performance chart of the vacuum pump is recorded and wherein the defining data of the vacuum pump operating point is fed. The control system further includes a resistance function on the suction side of the vacuum pump which depicts the suction resistance formed of at least the suction object in the suction side. The resistance function is determined by changing the rotational speed of the vacuum pump and recording the operating points in the control/central unit at various rotational speeds.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: July 15, 2003
    Assignee: Sulzer Pumpen AG
    Inventors: Kaarlo Horo, Seppo Kupiainen