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
Distribution Statement : APPROVED FOR PUBLIC RELEASE