Debra M Kenney

US Patent:

6751161, Jun 15, 2004

Filed:

Sep 26, 2001

Appl. No.:

09/962230

Inventors:

David B. Larrabee - Annapolis MD
William F. Flickinger - Arnold MD
Michael J. Grady - Ridley Park PA
Debra M. Kenney - Media PA
Kevin E. Crouchley - Pasadena MD

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H04B 1302

US Classification:

367143

Abstract:

An acoustic projector device having a piston exposed to pressure balanced air and water in an acoustically ideal position thereof within a piston chamber enclosing sleeve disposed in an outer housing to which deaerating water is selectively supplied in surrounding relation to the piston chamber sleeve while in communication with one side of the piston through axial slots in the sleeve uncovered by displacement of the piston from said acoustically ideal position.