Method and device for low-noise underwater propulsion

A method and apparatus is disclosed for producing propulsion underwater with minimal acoustical emission. In basic concept, the method comprises the expulsion and sucking of liquid into and out of a liquid port of a watercraft in a manner generating compression and expansion waves adjacent the liqui...

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Bibliographische Detailangaben
Hauptverfasser:	JANAKIRAM RAM D, DOMZALSKI DAVID B, HASSAN AHMED A
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING HEATING LIGHTING MARINE PROPULSION OR STEERING MECHANICAL ENGINEERING PERFORMING OPERATIONS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS RELATED EQUIPMENT SHIPS OR OTHER WATERBORNE VESSELS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A method and apparatus is disclosed for producing propulsion underwater with minimal acoustical emission. In basic concept, the method comprises the expulsion and sucking of liquid into and out of a liquid port of a watercraft in a manner generating compression and expansion waves adjacent the liquid port. Such expansion and compression waves generate a positive net thrust on the watercraft in a direction opposite that of their expulsion. A reciprocating member and an actuator are also disclosed for generating the forces and energy necessary to create the expansion and compression waves.