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7609586 |
Acoustic projector having minimized mechanical stresses
An acoustic projector which includes an outer shell ( 8 ) formed of a reinforced epoxy resin having a longitudinal slot ( 14 ) has an inner reinforcing liner ( 20 ) formed of metal to reduce...
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7573183 |
Flextensional vibration-free pressure oscillator
An apparatus for producing pressure oscillation of a fluid, incorporating hermetically sealed casing including a housing, a cover, a hermetic seal, a cylindrical flextensional transducer driven by...
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7569977 |
Laser capacitance trimmed piezoelectric element and method of making the same
A piezoelectric element suitable for use as a sensor element in a hydrophone. In a preferred embodiment, the sensor element comprises a ceramic lead zirconate titanate substrate defining opposed...
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7557492 |
Thermal expansion matching for acoustic telemetry system
Thermal expansion matching for an acoustic telemetry system. An acoustic telemetry system includes at least one electromagnetically active element and a biasing device which reduces a compressive...
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7557490 |
Systems and methods of a transducer having a plastic matching layer
Systems and methods of a transducer having a plastic matching layer. At least some of the illustrative embodiments are transducers comprising a housing (having a proximal end, a distal end and an...
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7551518 |
Driving means for acoustic marine vibrator
A marine vibrator that in a particular embodiment includes a substantially elliptically shaped outer shell, a driver having a first and second end, at least one outer spring connected between the...
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7495371 |
Cleaning tank with sleeved ultrasonic transducer
A ultrasonic cleaning system includes a tank composed of quartz or silicon carbide and one or more sleeved ultrasonic transducers mounted to the tank. The sleeved ultrasonic transducer has a...
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7456551 |
Packaging and integration system for micro sensors in the marine environment
The integrated unmanned, affordable, microsystem in accordance with the present invention is used to deploy physical or chemical sensors for continuous monitoring of sea space over large time...
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7382082 |
Piezoelectric transducer with gas matrix
A piezoelectric transducer defined by two faces comprises a plurality of piezoelectric cylinders. The axial length and composition of the piezoelectric cylinders determines the frequency of the...
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7336019 |
Apparatus, circuitry, signals, probes and methods for cleaning and/or processing with sound
The invention utilizes multiple frequency ultrasound generators driving multiple frequency harmonic transducer arrays at sweeping frequencies into the megasonic range. Generator signals that...
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7288878 |
Piezoelectric transducer assembly
A transducer assembly may comprise a thickness-mode piezoelectric ceramic body, a pair of foil conductors with mesh end portions, and a coupling medium used to fill in the interstices in the...
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7276839 |
Bondable fluoropolymer film as a water block/acoustic window for environmentally isolating acoustic devices
A combination transducer and water-blocking film for acoustic signaling through ambient water. The water-blocking film has an etched fluoropolymer film and adjacent bonding film interposed between...
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7161280 |
Ultrasonic transducer and method of joining an ultrasonic transducer
The invention concerns an ultrasonic transducer, which is assembled from several parts. These parts are a protecting plate, a piezoelectric disc and a housing. Joining of the parts for transducers...
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7103022 |
Communication control method and apparatus in mobile communication system
A communication control method used in a cellular mobile communication system in which each base station can radiate radio wave beams to a plurality of directions and each base station communicates...
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7093343 |
Method of manufacturing an acoustic transducer
An acoustic transducer design having a slotted oval-shaped shell and active transducer elements located on the inner surface of the shell is disclosed. The design provides a high power, ultra-low...
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7082810 |
Gas sensor
A gas sensor ( 10 ) including a measurement chamber ( 28 ) into which a gas GS is flown and a detection element main body ( 40 ) facing the measurement chamber ( 28 ). The detection element main...
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6993812 |
Method of manufacturing the piezoelectric transducer
Inner individual electrodes are formed at intervals on a piezoelectric ceramic layer so as to correspond in a one-to-one relationship with ink channels, and an inner common electrode are formed on...
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6919668 |
Composite piezoelectric element
A composite piezoelectric element has a layered configuration of a plurality of unit composite sheets. Each of the unit composite sheets includes a resin layer and a plurality of columnar...
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6873572 |
Low-frequency sonar countermeasure
A multi-port projector of acoustic energy in water includes a cylindrical hollow transducer having open annular ends. A thin, flexible member is secured to each annular end to extend across each...
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6868594 |
Method for making a transducer
A method for producing transducers having a 1-3 composite structure. The transducer element includes a plurality of thin piezoceramic wafers which are electroded on opposing major surfaces. The...
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6815872 |
Ultrasonic transducer system having an organic-structural-material housing
An ultrasonic transducer system has at least one ultrasonic transducer. Each ultrasonic transducer includes a housing having a wall that is made at least in part of an organic structural material...
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6798122 |
Lightweight underwater acoustic projector
A compound electro-acoustic transducer for producing acoustic signals has a plurality of elements. Each element has a piezoelectric disk with electrically conductive plates fixed on the top and...
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6750595 |
Underwater wide-band electroacoustic transducer and packaging method
An underwater wide-band electroacoustic transducer and a method of packaging the transducer. The underwater wide-band electroacoustic transducer comprises of several groups of piezoelectric ceramic...
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6711096 |
Shaped piezoelectric composite array
An underwater acoustic transducer includes a set of formed substrates of piezoelectric polymer composite, the formed substrates having at least a first and second surface. Conductive electrodes are...
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6700217 |
Apparatus for converting ocean wave motion to electricity
A power transfer system for converting recurring wave movement within the ocean to electrical energy. The system comprises pressure sensing structure such as a pressure transducer 10 or...
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6671230 |
Piezoelectric volumetric array
A three-dimensional array of acoustic sensors. The array can be used for both the transmission and reception of acoustic signals. The array comprises electroplated piezoelectric polymer layers that...
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6661160 |
High power density dual-rotor device
A torsional motor, comprising: a plurality of segments in the shape of a tube comprising an electroactive material with a poling along the length dimension with adjacent segments arranged with...
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6643222 |
Wave flextensional shell configuration
A flextensional transducer projector shell design is disclosed. The shell design has a shape formed so as to reduce the stress placed on the transduction driver as compared to other shell designs....
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6619394 |
Method and apparatus for treating a wellbore with vibratory waves to remove particles therefrom
A process and apparatus for treating a wellbore, comprising subjecting a substantially same portion of the wellbore to vibratory waves produced by a plurality of vibratory wave generators. The...
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6567343 |
Flextensional resonant pipe projector
An underwater acoustic projector comprising a pair of spaced apart end walls with an acoustic driver positioned between the end walls, the driver having smaller cross-sectional dimensions than the...
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6567342 |
Flared wave-guide projector
An underwater acoustic projector comprising a pair of spaced apart end walls with an acoustic driver positioned between the end walls, the driver having smaller cross-sectional dimensions than the...
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6555947 |
Pressure-balanced underwater acoustic transducer
Provided is a pressure-balanced underwater acoustic transducer. The transducer includes an oscillator unit having an oscillator oscillating by an electrical signal supplied to electrodes, provided...
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6545949 |
Axial drive resonant pipe projector (ADRPP)
An underwater acoustic projector comprising a pair of spaced apart end walls with an acoustic driver positioned between the end walls, the driver having smaller cross-sectional dimensions than the...
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6465936 |
Flextensional transducer assembly and method for its manufacture
A flextensional transducer assembly having a single flextensional cell with a transducer housed with a platten. The transducer expands and contracts in a transverse direction to cause inverse...
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6429575 |
Device for transmitting ultrasonic energy to a liquid or pasty medium
A device for transmitting ultrasonic energy to a liquid or pasty medium, comprising an alternating current generator ( 23 ) intended to operate in a frequency range of 1 to 100 kHz, a...
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6404106 |
Pressure tolerant transducer
This invention concerns a transducer comprising a layer of active material and a backing plate ( 110 ). The backing plate ( 110 ) has first and second major surfaces. A layer ( 111 ) of active...
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6323584 |
Interchangeable vessel having a level sensor therewith
An interchangeable vessel having a substance therein where the vessel is constructed to be inserted into a larger apparatus so that the apparatus may use the substance therein, the interchangeable...
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6318497 |
Pressure-sensitive switch, its method of calibration and use in a hydrophone array
A pressure-sensitive switch comprises a base member having a mounting surface formed of electrically-insulating material; two electrodes mounted on the base member and each having an...
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6310427 |
Connecting apparatus for electro-acoustic devices
Modified configurations for electrical connectors to ceramic transducers are designed to reduce failure rates due to fatigue during transducer operation. These modifications eliminate or reduce one...
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6277299 |
High-sensitivity piezocomposite material and ultrasonic transducer made therefrom
A piezoelectrically active conformal filler material is incorporated in a 1-3, 3-3 or 2-2 piezocomposite structure. The piezoelectrically active conformal filler material has a 0-3 structure and is...
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6242847 |
Ultrasonic transducer with epoxy compression elements
The invention provides systems, methods and apparatus for processing delicate parts within a process tank such as an ultrasonic tank. Typically, one or more transducers connect to the tank and...
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RE37204 |
Transducer assembly
A support member preferably made of a metal such as cold rolled steel is disposed in a looped configuration and is provided with a gap. A transducer member preferably made of a piezoelectric...
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6222306 |
Actuators of active piezoelectric or electrostrictive material
A piezoelectric or electrostrictive actuator, comprising a plurality of stages of piezoelectric or electrostrictive active blocks distributed so as to form a tubular structure, the polarization of...
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6211601 |
Multi-tuned acoustic cylindrical projector
A system and method for operating a cylindrical acoustic projector is provided which allows efficient operation of the projector over a wide bandwidth. The system and method use multiple power...
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6191523 |
Tranducing composite of sintered piezoelectric ceramic granules in a polymer matrix
A piezoelectric ceramic-polymer composite is made of a substantially two-dimensional polymer matrix and a monolayer of sintered piezoelectric ceramic granules dispersed throughout the matrix so...
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6188162 |
High power megasonic transducer
A megasonic transducer comprised of a stainless steel plate attached to a piezoelectric crystal by an indium attachment layer. To facilitate the attachment, a chromium layer and a silver layer are...
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6151277 |
Hydrophone with ferroelectric sensor
An arcuate or flat ferroelectric sensor is incorporated in a seismic streamer. The structure comprises two half-cylinders which are mounted together around a cable. The half-cylinders are coupled...
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6081979 |
Method of making a transducing composite of sintered piezoelectric ceramic granules in a polymer matrix
A piezoelectric ceramic-polymer composite is made of a substantially two-dimensional polymer matrix and a monolayer of sintered piezoelectric ceramic granules dispersed throughout the matrix so...
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6069845 |
Composite marine seismic source
A marine seismic source for generating acoustic source energy from electrical power. A slotted housing has an exterior surface engaged with an electrically activated transducer such as a...
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6046961 |
Multi-layer tiled array
A sonar sensor array having a multi-layer tiling arrangement for the indiual elements that increases surface area available for each element while maintaining the inter-element spacing required to...
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