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8902712 Method for enhancing low frequency output of impulsive type seismic energy sources and its application to a seismic energy source for use while drilling  
A method for operating an impulsive type seismic energy source in a firing sequence having at least two actuations for each seismic impulse to be generated by the source. The actuations have a...
8900166 Automatic adjustable voltage to stabilize pressure for shockwave medical therapy device  
An electrohydraulic shock-wave therapy apparatus comprising a variable voltage source and a controller that controls the voltage source for accurate adjustment of the shock wave pressure. The...
8619503 Sparker type wellbore seismic energy source having controllable depth independent frequency  
A wellbore seismic source includes a sparker electrically coupled to a power source. The sparker is disposed in a pressure-sealed canister, wherein the canister is at least partially filled with...
8259534 Generator device for marine geophysical research  
The generator device is proposed for seabed survey, comprising a generator line, including electrodes, a hoist, hydraulic pump, air compressor, and at least one hose joined to the generator line,...
8088073 Device for the application of acoustic shock waves  
A device, in particular a therapy device, for the application of acoustic shock waves aimed at a region to be treated in a human or animal body and comprising a housing with a coupling surface for...
7505365 Lorentz acoustic transmitter for underwater communications  
Described is a device for generating an acoustic signal in an electrically conductive medium such as salt water. The device of the present invention has a broadband frequency response and supports...
7352653 High-resolution and high-power ultrasound method and device, for submarine exploration  
A method for underwater exploration which makes use of a parabolic transmitter (1) and a parabolic receiver (3), the transmitter (1) and the receiver (3) being both open at their lower side and...
7311678 Pressure-pulse therapy apparatus  
Disclosed is a device for producing an intracorporeal pressure pulse comprising a pressure pulse source configured to generate a collimated pressure pulse and an acoustic lens including at least...
7267654 Focused shock-wave devices with direct wave cavitation suppressor  
A reflector (14) reflects energy emitting from an energy source (16) and focuses and directs it to a target. An aperture stop or suppressor disk (18) is positioned between the energy source (16)...
7251195 Apparatus for generating an acoustic signal  
An apparatus for generating an acoustic signal which has a dielectric substrate having opposed first and second sides. A pair of electrodes are mounted on the first surface of the substrate so...
7245560 Acoustic source for infrasonic electromagnetic wave exploration using induced electrokinetic effect  
An acoustic source for infrasonic electromagnetic wave exploration including: an electrically conductive, generally cylindrical tubular member for containing an electrically conductive fluid, the...
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...
6687189 High efficiency long lifetime sparker sources  
An impulsive acoustic and radiation source is provided that maintains a constant electrode gap to provide efficient and long life operation. In one implementation the electrodes have a “toaster”...
6666834 Method and apparatus for generating shock waves  
A device for generating shock waves, specifically for medical applications, has electrodes arranged in a liquid medium, a high voltage being applied to the electrodes to generate an electrical...
6366535 Apparatus for generating ultrasonic fields  
The thermohydraulic principle is utilized for generating intensive ultrasonic fields. At least two electrodes which enclose a volume with an electrolyte are driven by a power pulse generator. The...
6217531 Adjustable electrode and related method  
The present invention relates to a electrode assembly and related method that includes a insulator assembly, an electrode assembly, a charging system, a mechanism for measuring electrical...
6215734 Electrohydraulic pressure wave projectors  
A projector (10) for creating electrohydraulic acoustic and pressure waves comprising an energy source (21) (such as a capacitor) within approximately one meter of an electrode array (23). Larger...
6186963 Device for generating acoustic shock waves, especially for medical applications  
A device for generating acoustic shock waves, comprising at least two electrodes which form a spark discharge gap G in a fluid volume and a reflector for the acoustic shock waves generated during...
6113560 Method and device for generating shock waves for medical therapy, particularly for electro-hydraulic lithotripsy  
The invention concerns a method and device for generating shock waves by spark discharge between electrodes which are intermittently fed with electric current in a fluid medium such as water. The...
6080119 Process and device for generating shock waves for medical uses  
Acoustic shock waves for medical uses are generated by an electrical discharge between two electrodes, which are mounted in a liquid medium. A catalyst is added to the liquid medium in the area of...
6018502 Long life coaxial sparker for underwater sound source  
An efficient sparker for a pulse powered underwater acoustic source for msweeping is capable of repetitive discharges at about 15 Hz for at least one hour without replacement or maintenance. The...
5995452 System for generating and transmitting acoustic signals underwater  
An array system, which provides a unipolar acoustic impulse with a broad spectral response underwater, utilizes a vertical array of airgun or electrical spark sources whose individual peak source...
5992559 Reversible polarity borehole seismic device for P and enhanced S-wave crosshole testing  
A seismic source for crosshole testing comprises a hammer rod supported by axial bearings in the ends of a cylindrical housing. Fasteners attach a down-blow hammer to the hammer rod inside the...
5903518 Multiple plasma channel high output variable electro-acoustic pulse source  
An acoustic impulse source has been developed and used to simulate the high coustic output of detonation driven acoustic sources. While detonation driven acoustic sources are capable of producing...
5889209 Method and apparatus for preventing biofouling of aquatic sensors  
A submersible ultrasonic emitter is integrated with a dissolved oxygen (DO) or other aquatic probe so that biofouling of the sensor's membrane is minimized. Sonification, that is, exposure to...
5841737 Sparker source systems  
An impulsive acoustic radiation source includes an enclosure disposed about an impulse generator to control the generated acoustic spectrum. In some implementations, the impulse source includes...
5748563 Energy converter for generating high-power pulses  
An energy converter for generating high-power pulses includes a housing defining a chamber having an open side; an electrode assembly supported in the chamber; a power supply for applying a...
5636180 System for preventing biofouling of surfaces exposed to water  
Acoustical shock waves are generated by electrical sparks within a gap between electrodes adjustably positioned for exposure to water adjacent a surface immersed therein. High voltage electrical...
5529572 Method and apparatus particularly useful for treating osteoporosis  
A method and apparatus for increasing the density and strength of bone, particularly for preventing or treating osteoporosis, by subjecting the bone to unfocussed compressional shock waves.
5458652 Device for generating shock waves for non contact disintegration of calculi  
The invention relates to a device for generating shock waves by means of a park gap by using two electrodes. At a spark gap, apart from the desired shock waves, low frequency sound parts are...
5432756 Zebra mussel (Dreissena polymorpha) and other aquatic organism control  
Water is treated with sound waves produced by means of a submerged plasma sparking device (16) to mitigate detrimental effects of aquatic organisms in the water. For example, the incrustation of...
5408049 Multiple-phase electrical system  
An electrical system comprises an inverter, a three-phase electric motor and a cable to transfer energy from the inverter to the motor. The cable further comprises a center conductor and two...
5398217 Method of high-resolution sea bottom prospecting and tuned array of paraboloidal, electroacoustic transducers to carry out such method  
A method of and an apparatus for the high-resolution sea bottom prospecting, in which an electroacoustic paraboloidal transducer is placed into water, the electrodes of which are near the focus of...
5331952 Water system for lithotripter  
A water system is provided for an extracoporeal lithotripter. The reflector is aimed downwardly and has a spark gap at the first focus point thereof for generating a shock wave. A rubber diaphragm...
5305287 High-frequency borehole seismic source  
An acoustic source for seismic exploration has a generally cylindrical tube ith spaced upper and lower closed ends. An insulated continuous conductor has a first portion with an exposed internal...
5301169 Seismic source  
A source of seismic waves operable within a borehole filled with liquid crises a module supported by a cable. The module includes means to generate a high voltage and to charge a bank of...
5259368 Apparatus for comminuting concretions in the body of a patient  
An apparatus for comminuting concretions in a patient's body includes a liquid filled focusing chamber, defined by a reflector (2) with an inner wall having the form of an open revolution...
5245988 Preparing a circuit for the production of shockwaves  
The ignition of spark gaps for the production of shockwaves in the contactless comminution of concrements, using a capacitor discharge is improved by providing at least for some time prior to the...
5239985 Electrode to destroy renal stones  
A medical electrode arrangement for urological use, has a core with an aperture going therethrough. This aperture receives a first electrode. A cage is defined by at least a side wall having first...
5231976 Apparatus for triggering shock waves  
Apparatus for triggering shock waves for therapeutic purposes, and generated with the aid of spark discharge in a liquid includes a signal analyzer disposed for receiving the ECG signal from a...
5228011 Variable multi-stage arc discharge acoustic pulse source transducer  
A method of and a system for remotely controlling an adjustable, electrodeless arc discharge acoustic pulse transducer for borehole and underwater operations using high-energy arc discharges to...
5208788 Discharge circuit, and use thereof in a method and in apparatus for detecting and correcting the positions of electrodes, in particular as used in apparatuses for generating pressure waves  
The invention relates to an electrical discharge circuit between two electrodes. The circuit includes switch means connected in parallel between the electrodes and constituting a switch that is...
5195508 Spark gap unit for lithotripsy  
A spark gap unit that is easy to manufacture and significantly lighter than previously used spark gap units for generating underwater shock waves, particularly for non-invasive lithotrispy, has an...
5146912 Variable energy shock wave production  
An arrangement for the comminution of concrements of various kinds in the body of living being, uses an underwater or submerged arc gap with spark discharge, and an electrical energizing circuitry...
5105801 Method and apparatus for improving the reproducibility and efficiency of the pressure waves generated by a shock wave generating apparatus  
The present invention relates to a method and device for discharging an electric current between two electrodes, comprising considerably reducing the resistance to the passage of electric current...
4962753 A method and device for improving the discharge regime between two electrodes  
The invention relates to a method and to a device for improving the dische regime of an electric arc produced between two electrodes. The device is characterized in that it includes means an...
4868791 Method and apparatus for detecting and correcting the positions of electrodes, in particular in shock wave generator apparatus using a feeler finger, e.g. the rod of an actuator, movable to the focus  
The invention relates to a method and to apparatus for detecting and correcting the positions of electrodes. The device comprises means for advancing the electrodes to cause them to advance and...
4764906 Plasma jet underwater acoustic source  
A novel device and method are provided herein for the production of underwater sound. This device, termed a plasma jet underwater acoustic source includes a central electrode and a concentric...
4734894 Electroacoustic pulse source for high resolution seismic prospectings  
A seismic source consists of an electroacoustic transducer having a metallic structure, shaped like an empty round paraboloid (1) closed at the base by means of an elastic diaphragm and filled...
4715375 Degassification of water in hydraulic spark gap shock wave generator  
Kidney stones are disintegrated by extracorporeal apparatus generated shock waves. A reflector open at one end, has a liquid such as water therein and a resilient disphragm across the open end of...

Matches 1 - 50 out of 77 1 2 >