Patents by Inventor Lennart Nils Johansson

Lennart Nils Johansson 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).

  • Heating device for an external combustion engine
    Patent number: 4055952
    Abstract: An external combustion engine has an insulated cylinder with one open end and heater tubes mounted at the closed end to permit entry of a heater unit concentrically within the open end to abut the heater tubes.
    Type: Grant
    Filed: November 11, 1975
    Date of Patent: November 1, 1977
    Assignee: Forenade Fabriksverken
    Inventors: Lennart Nils Johansson, Claes-Goran O. Svensson
  • Hot gas engine
    Patent number: 3942324
    Abstract: A hot gas engine including an injector for introducing a mixture of air and fuel into the combustion chamber to heat the working medium which is circulated in a system of ducts. Fresh air for the combustion of the fuel is preheated in a heat exchanger by exhaust gases from the combustion chamber and conducted to the fuel injector. A heating system for passing a heat exchange fluid to a space to be heated surrounds the combustion chamber, and the heat exchange fluid is thus heated by heat exchange with the exhaust gases.
    Type: Grant
    Filed: July 12, 1974
    Date of Patent: March 9, 1976
    Assignee: Forenade Fabriksverken
    Inventors: Lennart Nils Johansson, Ragnar Karl Olof Gronvall