Accession Number : ADD002804

Title :   Attachment Devices for Underwater Salvage.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Barrett,Frederick B ; Nielsen,Peter A

Report Date : 20 Jan 1976

Pagination or Media Count : 8

Abstract : The patent relates to an attachment device for underwater salvage operations which has an elongated cylindrical body and a plurality of extendable lugs supported in one or more apertures near the tapered end of the cylindrical body. After insertion in a predrilled hole, the lugs are extended either by a spring action or mechanically by a shaft passing through the center of the cylindrical body. An external concentric collar on the hollow body supports a shackle for attachment of a cable. A scalloped handle attached to the hollow body at the end adjacent to the shackle permits the collar to be tightened down firmly against the hull after attachment to increase side load bending strength by the lift cable attached to the shackle. The end of the cylindrical body adjacent to the extendable lugs may be tapered to aid in alignment and insertion in a predrilled hole.

Descriptors :   *Underwater objects, *Salvage, *Underwater tools, *Patents, Structural members, Attachment, Divers

Subject Categories : Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE