Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Reexamination Certificate
2000-04-27
2001-11-20
Pihulic, Daniel T. (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
Reexamination Certificate
active
06320821
ABSTRACT:
The present invention relates generally to the translation of acoustical energy into a body of liquid such as water from a high power acoustical source.
BACKGROUND OF THE INVENTION
Acoustical energy projector devices, such as a fluidborne noise source delivering underwater sound are generally known in the art. Such projector devices when adapted for use in a piping system operating under high pressures of up to 1000 psi for example, have been found to be unsuitable because of their fragility, subjecting it to damage during operation and its inability to deliver acoustical energy at a relatively high power level. It is therefore an important object of the present invention to provide an acoustical projector of fluidborne sound or noise within a wide acoustical spectrum, with a monitored input under control and to prevent damage due to changing system pressures entrapped in the delivery device.
SUMMARY OF THE INVENTION
In accordance with the present invention, an acoustical projector device is provided for a fluidborne noise generating system, within which input acoustical energy at controllable power level is translated to a body of liquid through a piston undergoing displacement to a static position within a pressure sealed chamber assembly through which gas and liquid are applied to the piston under automatically balanced pressures, with further regulated positioning of the piston being effected by controlled pressurization and venting of the gas within the piston chamber. Displacement of the piston is also mechanically limited to prevent damage by changing operational pressures exerted thereon to thereby accommodate a wide diversity of characteristics of the acoustical energy to be translated, such as sound frequencies, tones, bands and wave forms.
REFERENCES:
patent: 3516052 (1970-06-01), Bouyoucos
patent: 4030063 (1977-06-01), Wallen
patent: 4483411 (1984-11-01), Mifsud
patent: 5467322 (1995-11-01), Walter
patent: 5894451 (1999-04-01), DeJaco et al.
Goldring Jeffrey S.
Henry, IV John W.
Larrabee David B.
Pihulic Daniel T.
Schuster Jacob
The United States of America as represented by the Secretary of
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