Accession Number : ADD006134

Title :   Submersible Apparatus for Evacuating Seawater from Suction-Type Work-Handling Gripper Members.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Hackman,Donald J ; Brunel,Roger L

Report Date : 15 May 1979

Pagination or Media Count : 6

Abstract : A light-walled portable casing, filled with a hydraulic fluid, contains a high-pressure water pump driven by a hydraulic fluid-driven motor. An externally-carried, suction-type gripper member engages the work object. Pumping evacuated seawater from the engaged surface to establish a secure differential-pressure hold-down force. A pressurized source of hydraulic fluid is applied through the casing to the motor. Fluid discharges from the motor directly into the casing to establish an interior casing pressure that pressure compensates the light-walled structure. Seawater evacuation eventually stalls the motor. When leakage occurs, pumping immediately resumes. (Author)

Descriptors :   *Patents, *Underwater tools, *Underwater equipment, Attachment, Suction, Pumps, Sea water, Evacuation, Portable equipment, Salvage

Subject Categories : Machinery and Tools
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE