Accession Number : ADD013435

Title :   Underwater Excavator.

Descriptive Note : Patent, Filed 2 Apr 81, patented 11 Oct 83,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Williams, Harry S ; Yates, Jan B ; Reidy, John J ; Faccini, Ernest ; Hill, Terry E

Report Date : 11 Oct 1983

Pagination or Media Count : 8

Abstract : An underwater excavator comprising a modular non-metallic cofferdam wherein water 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.

Descriptors :   *PATENTS, *EXCAVATION, BARRIERS, CONDUITS, DISPERSIONS, EJECTORS, FLUID FLOW, FLUIDS, HORIZONTAL ORIENTATION, NOZZLES, PRESSURIZATION, SOLIDS, WATER, UNDERWATER EQUIPMENT

Subject Categories : Construction Equipment, Materials & Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE