Accession Number : AD0163997

Title :   Method and Apparatus for Rock Excavation.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Back,Earl J. , Jr

Report Date : 05 DEC 1972

Pagination or Media Count : 5

Abstract : The patent relates to an apparatus and method for producing a slug of water to be delivered at high impact velocity against a surface to be eroded. It includes a cylinder containing a reciprocable ram having a shaped end. Introduction of fluid tangentially into the cylinder forms a stable annulus of fluid and reciprocation of the ram rapidly expels the fluid as a jet our an end opening of the cylinder into contact with the work to be eroded.

Descriptors :   (*LIQUID JETS, *PATENTS), (*ROCK, REMOVAL), VIBRATION, EXCITATION, SPALLATION, OCEAN BOTTOM

Subject Categories : Mining Engineering
      Construction Equipment, Materials & Supplies
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE