Patents by Inventor Erkki E. Putkonen

Erkki E. Putkonen 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).

  • Method and apparatus for pneumatic feeding or additives into converters
    Patent number: 4676826
    Abstract: A method and apparatus for pneumatic feeding of additives along pipes from an additive silo to converters. The additive is allowed to flow into a dispatching device, a scale or a similar device in it stopping the entrance of the additive when the desired quantity of additive has arrived in the dispatching device. The dispatching device is pressurized thereafter by means of compressed air, by means of which the quantity of additive is fed via a pipe into the converters.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: June 30, 1987
    Inventors: Markku J. Jortikka, Eino H. Forss, Harry A. Heino, Erkki A. Lajunen, Erkki E. Putkonen, Toivo E. Julkunen, Timo Laurio