Patents by Inventor Paul J. Sheffield

Paul J. Sheffield 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).

  • Light-weight oxygen delivery hood assembly for hyperbaric chamber
    Patent number: 4620538
    Abstract: A light-weight hyperbaric oxygen therapy hood assembly comprising a neckdam and hood having a gas inlet and outlet. The neckdam comprises a diaphragm which can be varied from an open to a closed condition for sealing of the neckdam around the neck of the patient, the diaphragm being concentric to the hood and neckdam. An inflatable bladder is providable at the back of the hood. A check valve is affixable to the gas outlet of the hood.
    Type: Grant
    Filed: March 19, 1985
    Date of Patent: November 4, 1986
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Ewald Koegel, Paul J. Sheffield