Patent Number: 6,252,822

Title: Countermeasure device with air bag hover system and pressure compensated acoustic projectors

Abstract: A countermeasure device which is supplied with air in order to actively compensate for external water pressure at any depth, is disclosed. The countermeasure includes an air bag hover system and one or more acoustic projectors, both of which are connected by an air line to a high pressure air source. A sensor is provided which measures the external water pressure and transmits the measurements to a microprocessor. Upon sensing an increased external water pressure, a pressure regulator valve is opened and air is supplied to both the acoustic projectors and the air bag in order to compensate for the increased water pressure. Similarly, if the external water pressure decreases, then air is released from both the air bag and the acoustic projectors through a pressure vent valve connected to the air bag. The microprocessor can also be programmed to vary the deployment depth of the device by varying the internal pressure within the device relative to the external water pressure.

Inventors: Obara; Robert J. (Portsmouth, RI)

Assignee: The United States of America as represented by the Secretary of the Navy

International Classification: F41J 2/00 (20060101); G01S 7/537 (20060101); G01S 007/38 ()

Expiration Date: 06/26/2018