Patents by Inventor Harry S. Williams

Harry S. Williams 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).

  • Underwater excavator
    Patent number: 4408405
    Abstract: An underwater excavator comprising a modular non-metallic cofferdam wherein ater under pressure exits from a plurality of nozzles along at least one side of the base of the cofferdam and a fluid driven eductor driven by pressurized fluid evacuates the suspended solids raised by the pressurized fluid that flows through the nozzles, with a plurality of small barrier nozzles located along one or more horizontal conduits used to sink the cofferdam.
    Type: Grant
    Filed: April 2, 1981
    Date of Patent: October 11, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Harry S. Williams, Jan B. Yates, John J. Reidy, Ernest Faccini, Terry E. Hill, William K. Shafley