Patents by Inventor Dean M. Nielsen

Dean M. Nielsen 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).

  • Refrigeration system with carbon dioxide injector
    Patent number: 4399658
    Abstract: A system for producing refrigeration from a source of liquid carbon dioxide. The liquid carbon dioxide is injected through a nozzle into a primary stream within an elongate enclosure. The enclosure is mounted with its inlet end spaced about the nozzle to define an opening through which an annular stream of ambient gas is directed about the primary stream. The ambient gas turbulently intermixes with the injected coolant for subliming any solid carbon dioxide or snow so that the resulting stream exhausting from the enclosure is free of snow.
    Type: Grant
    Filed: February 8, 1978
    Date of Patent: August 23, 1983
    Assignee: Safeway Stores, Incorporated
    Inventor: Dean M. Nielsen