Patents by Inventor Istvan Szentgyorgyi

Istvan Szentgyorgyi 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).

  • Multi-stage heat pump of the compressor-type operating with a solution
    Patent number: 4688397
    Abstract: A hybrid heat pump wherein the operating medium is a mixture of media which dissolve in each other and have different boiling points. The condensation and/or the evaporation is performed on more than one pressure levels and at variable temperatures. The compressor performs the suction on more than one pressure levels and performs the discharge on more than one pressure level. Between low pressure operating medium (p.sub.1, p.sub.2) and large pressure operating medium (p.sub.3, p.sub.4, p.sub.5) the heat transfer is performed by the internal heat exchangers.
    Type: Grant
    Filed: December 3, 1985
    Date of Patent: August 25, 1987
    Assignee: Energiagazdalkodasi Intezet
    Inventors: Arpad Bakay, Gyorgy Bergmann, Geza Hivessy, Istvan Szentgyorgyi