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| Number | Title | Issue Date |
| 8064291 | Engine and technique for generating an acoustic signal An embodiment of device for generating an acoustic signal in a fluid includes an engine operable to repeat a thermodynamic process to vibrate a membrane of the engine to generate an acoustic signal having more than one period. The thermodynamic process includes heat... | 11/22/2011 |
| 7944776 | Engine and technique for generating an acoustic signal An embodiment of a device for generating an acoustic signal in a fluid includes an engine operable to repeat a thermodynamic process to vibrate a membrane of the engine to generate an acoustic signal having more than one period. The thermodynamic process includes he... | 05/17/2011 |
| 7936641 | Engine and technique for generating an acoustic signal An embodiment of a device for generating an acoustic signal in a fluid includes an engine operable to repeat a thermodynamic process to vibrate a membrane of the engine to generate an acoustic signal having more than one period. The thermodynamic process includes he... | 05/03/2011 |
| 7047724 | Combustion ignition Distributed initiation (e.g., multipoint or continuous) is utilized to obtain constant volume-like combustion performance in a pulse combustion device in the absence of detonation. A number of such devices may be utilized as turbine engine combustors. ... | 05/23/2006 |
| 7028807 | Non-explosive acoustic source A non-explosive acoustic source utilizes the combustion of aluminum and water to generate an acoustic pulse. The operation of the non-explosive acoustic source relies on a water/aluminum reaction to generate a burst pressure. The source may be deployed as a single c... | 04/18/2006 |
| 7011047 | Detonative cleaning apparatus Methods and apparatus are provided for cleaning a surface within a vessel. A fuel/oxidizer charge is provided within a combustion conduit. An initial deflagration commenced in a first portion of the charge produces a final detonation at least in another portion of t... | 03/14/2006 |
| 6738315 | Underwater target testing An underwater target such as the hull of a ship is tested for its susceptibility to damage from explosive shock waves emerging from a rigid conical shell in response to detonation of an explosive charge therein. Such shell is located underwater in close spaced relat... | 05/18/2004 |
| 6707760 | Projectile sonar Shells fired from the gun of a ship create an underwater explosion that is used to drive a sonar system. Sonobuoys [201] and/or a ship-towed array measure acoustic signals caused by the underwater explosion. A ship processing component [306] analyzes t... | 03/16/2004 |
| 6705425 | Regenerative combustion device A regenerative combustion device having a combustion zone, and chemicals contained within the combustion zone, such as water, having a first equilibrium state, and a second combustible state. Means for transforming the chemicals from the first equilibrium state to t... | 03/16/2004 |
| 6606932 | Method and apparatus for neutralization of mines and obstacles The invention provides a method and apparatus for neutralizing mines and obstacles that can quickly and efficiently clear a specified surf zone without human intervention. In a preferred embodiment, the invention utilizes firing tubes including a combusti... | 08/19/2003 |
| 6571906 | Underwater sound mitigation system for explosive testing A sound mitigation system and method reduce the transmission of acoustic output from explosions underwater. The system is submerged to bottom terrain of a body of water and has at a series of gas-generating devices providing volumes of gas that are fed to... | 06/03/2003 |
| 6430108 | Pyro-acoustic generator for protecting submarines and surface ships The present invention provide a pyroacoustic device for protecting submarines or surface vessels, the device being characterized by the fact that it comprises: a structure (240) suitable for forming a positioning device for controlled positioning under wa... | 08/06/2002 |
| 6408614 | High-power pressure wave source High-power pressure wave source for generating pressure waves that can be repeated by igniting a combustible fluid mixture and by increasing its rate of combustion up to detonation. The high-performance pressure wave source has a channel, which expands to... | 06/25/2002 |
| 6366534 | Underwater high energy acoustic communications device An underwater high energy acoustic communications device has inner shell-like structure having an outer surface connected to first ends of tuning springs and outer shell-like structure having an inner surface connected to second ends of the tuning springs... | 04/02/2002 |
| 6324956 | Method and apparatus for neutralization of mines and obstacles The invention provides a method and apparatus for neutralizing mines and obstacles that can quickly and efficiently clear a specified surf zone without human intervention. In a preferred embodiment, the invention utilizes firing tubes including a combusti... | 12/04/2001 |
| 6089345 | Elastic wave exploration tool for wells A well tool in accordance with the invention comprises an attenuation device which attenuates tube waves associated with an elastic wave emission and/or reception set (1, 12). The attenuation device comprises a bubble generator (2) which releases into the... | 07/18/2000 |
| 5864517 | Pulsed combustion acoustic wave generator A pulsed combustion acoustic wave generator includes a tubular barrel having an inlet end and an open outlet end, a fuel controller for metering a controlled quantity of fuel into the inlet end of the barrel, an oxidant controller for metering a controlle... | 01/26/1999 |
| 5430691 | Shock wave generator A two-phase shock wave generator including a combustion chamber including a first, combustion, portion having an input port and a second, detonation, portion downstream of the first portion and having an output aperture; an air-fuel supply line, operative... | 07/04/1995 |
| 5341343 | Underwater explosive acoustic signature device An explosive actuated acoustic device emits sound to be used in torpedo countermeasures. Numbered devices are delivered over an extended area and sink through the water. The devices are actuated at different times as they sink, to provide sound masking ov... | 08/23/1994 |
| 5339288 | Underwater sound source with remote controlled actuator An underwater sound source with a remote controlled actuator comprising a oy having a buoyant portion, a plurality of launch tubes storing acoustic charges, a radio transceiver, control circuitry, hinged doors at the bottom of the tubes, and a safety rele... | 08/16/1994 |
| 5229977 | Directional underwater acoustic pulse source A closed-cycle combustion low-frequency acoustic pulse source for use underwater. An elongated combustion chamber, having a first end and a second end and an elongated elastic sleeve, is filled with a stoichiometric mixture of oxygen and hydrogen from an ... | 07/20/1993 |
| 5175712 | Underwater sound source with timed actuator An autonomous underwater acoustic charge deployment buoy that can deploy ustic charges at preselected time periods. The device can operate away from any control vessels or structures. The device comprises a plurality of launch tubes disposed within a fra... | 12/29/1992 |
| 5003515 | Submarine emergency communication transmitter An underwater acoustic transmitter adapted to be released from a submerged ubmarine to float towards the surface of the water and explode a plurality of signalling charges at a predetermined depth in a predetermined time sequence.... | 03/26/1991 |
| 4975890 | Underwater sound transmitting system An underwater signalling device to fire explosives at a preselected depth a prearranged time sequence, which is intended to be part of an underwater sound communication system.... | 12/04/1990 |
| 4691803 | Projectile powered piston A transportable seismic energy source having a baseplate for contacting the earth, an upper master cylinder affixed at its lower end to the base plate and extending uprightly from it, a receiving cylinder of outside diameter less than the internal diamete... | 09/08/1987 |
| 4633969 | Signalling device A device for under-water signalling has a chamber (38) which is normally closed by a replaceable element (39). A cartridge (16) in the device can be fired to release gas into the chamber and rupture the element (39), thus causing a sound wave to travel th... | 01/06/1987 |
| 4384632 | Charging system for seismic gas exploder Oxygen and propane are supplied to the combustion chamber of a marine seismic gas exploder from a pair of pressure regulated gas charging cylinders. Ignition of the resultant explosive gas mixture drives a piston connected with means for creating an acous... | 05/24/1983 |
| 4353431 | Recoil reducing system for gas guns Disclosed herein are improvements in a recoil reducing system of a gas gun which create pulses in a liquid medium by introducing therein gas under high pressure. The release of high pressure gas from the barrel of such a gas gun causes recoil of the barre... | 10/12/1982 |
| 4324310 | Seismic apparatus A high resolution seismic data acquisition system is made up of an electronically-fired shotgun source integrally connected to a detector-recording means displaced from the shotgun source.... | 04/13/1982 |
| 4189026 | Underwater generation of low frequency sound A device for underwater generation of low frequency sound comprising a coally shaped explosion chamber open at both ends, a firing chamber having inlet and outlet passages at opposite ends thereof, ignition means in the firing chamber, a restricted orifi... | 02/19/1980 |
| 4100991 | Fast cycle seismic gas exploder and method Within a stationary upstanding cylindrical housing, a piston and a base member resting on the ground are separated by an expansible detonation chamber. Means are provided for feeding successive charges of a combustible gas mixture into the chamber at a ra... | 07/18/1978 |
| 4057780 | Method for describing fractures in subterranean earth formations The configuration and directional orientation of natural or induced fractures in subterranean earth formations are described by introducing a liquid explosive into the fracture, detonating the explosive, and then monitoring the resulting acoustic emission... | 11/08/1977 |
| 4016952 | Marine gas exploder A pair of movable pistons are separated within an enclosed, submerged cylinder by an expansible combustion chamber. Piston rods extend from these pistons through the opposite ends of the cylinder. A pair of dish-shaped, circular plates are carried on the ... | 04/12/1977 |
| 3968855 | Seismic marine gun assembly The underwater gun assembly of this invention has an acceleration barrel and a firing gun. Percussion-initiatable cartridges are carried to the acceleration barrel by a stream of water. Each cartridge has an outside diameter which is nearly equal to the i... | 07/13/1976 |
| 3952832 | Pulsed high pressure liquid propellant combustion powered seismic sources A liquid propellant is burned in the bulk mode and in pulses to produce high combustion pressures with large power outputs. The pulsed high pressure liquid propellant combustion is also used for producing sound waves for underwater seismic exploration. Th... | 04/27/1976 |
| 3951229 | Method and apparatus for imparting a seismic pulse to the earth An apparatus and method for controlling the travel of a vehicle mounted seismic gas exploder adapted to deliver a downwardly directed pulse to the earth and thereafter be driven in an upward direction by the resultant reaction force. The exploder is flexi... | 04/20/1976 |
| 3937296 | Firing device, explosive charge, method, and system, for seismic exploration A firing device is provided for initiation of delay type seismic charge assemblies, which comprises means for conveying and guiding the charge assemblies, in the seismic test zone, into electrical initiation contact with one of any number of available pai... | 02/10/1976 |
