Patents by Inventor Norman D. Postma

Norman D. Postma 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).

  • Multiple regenerators
    Patent number: 3939657
    Abstract: A hot gas engine of the Stirling type is disclosed. The engine has a heater head assembly provided with a plurality of separated regenerators connected in series in the heater tube labyrinth. The regenerators may be cascaded in size and mass to meet predetermined heat exchange design conditions. The temperature of exhaust gases exiting directly from the heater head assembly can be optimized at less than 800.degree.F, but more practically at about 1,000.degree.-1,200.degree.F.
    Type: Grant
    Filed: September 5, 1974
    Date of Patent: February 24, 1976
    Assignee: Ford Motor Company
    Inventors: Norman D. Postma, David W. Barton