Accession Number : ADD012193

Title :   Underwater Sound Generator.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Hugus,George D ; Young,A M

Report Date : 03 Dec 1985

Pagination or Media Count : 8

Abstract : This patent discloses an underwater sound generator comprising dual opposed pistons in a housing. Dynamic seal assemblies of flexible waterproof material are compressed against the peripheries of the pistons and the housing and form a watertight seal that allows axial motion. Controllers regulate the delivery of pressurized hydraulic fluid to hydraulic actuators which drive the axial motion of the pistons according to a predetermined variation.

Descriptors :   *PATENTS, *UNDERWATER SOUND GENERATORS, *HYDRAULIC ACTUATORS, PISTONS, ACOUSTIC EMISSIONS, HYDRAULIC FLUIDS, UNDERWATER SOUND, CONTROL SYSTEMS, HIGH RATE, LOW FREQUENCY, FLEXIBLE MATERIALS, HOUSINGS, PRESSURIZATION, FLEXIBLE MATERIALS, SEALS(STOPPERS), MOTION, SERVOMECHANISMS, WATERTIGHTNESS, AXES

Subject Categories : Hydraulic and Pneumatic Equipment
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE