Patents by Inventor John J. Quartarone

John J. Quartarone 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).

  • Elastomeric cut-off valve
    Patent number: 5878778
    Abstract: A cut-off valve consists of a hollow rigid body and a flexible or supple forated plug. The plug defines a flow pate therethrough and is sealed in the rigid body between the rigid body's inlet and outlet to define a free volume in the rigid body between the inlet and the plug. The plug flexes or deforms in response to a differential pressure thereacross to collapse into the flow path when the differential pressure exceeds a predetermined threshold thereby stopping the flow.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: March 9, 1999
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: James R. Quartarone, John J. Quartarone