| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 367157000 | Piezoelectric | 25 |
| 20090257317 | Macrosonic Generator for the Air-Based Industrial Defoaming of Liquids - This invention refers to a sonic and/or ultrasonic generator for emission in air with a power capacity and certain radiation characteristics which permit the necessary acoustic levels (>170 dB ref. 2·10 | 10-15-2009 |
| 20090303838 | Acoustic Sensor and Method - The invention relates to a sensor apparatus ( | 12-10-2009 |
| 20110026366 | Water Inflatable Volumetric Hydrophone Array - A hydrophone array includes an inflatable shaped housing enclosing an interior space and formable between a collapsed configuration and an expanded configuration, a framework of compliant material disposed within the interior of the inflatable housing, and a plurality of hydrophones attached to the compliant material at respective positions, wherein said hydrophones are arranged in a predetermined geometric array when the shaped housing is in the expanded configuration. Also provided herein is a system and method for deploying the hydrophone array. | 02-03-2011 |
| 20110075520 | SEISMIC SOURCE WHICH INCORPORATES EARTH COUPLING AS PART OF THE TRANSMITTER RESONANCE - An acoustic energy source for imparting acoustic energy into the Earth's subsurface includes an electrically driven transducer coupled to a source of swept frequency alternating current. A tunable Helmholtz resonator is disposed proximate the transducer. In one example, the resonator has a tuning device configured to maintain a resonant frequency substantially equal to an instantaneous frequency of the alternating current. The tuning device includes an actuator coupled to a sleeve, wherein the sleeve is disposed over selected numbers of openings in a wall of a tube on the resonator. The transducer and the resonator are disposed in a wellbore drilled through rock formations. The wellbore has a plurality of layers of fluid therein, each layer thereof having a different density and/or viscosity. | 03-31-2011 |
| 20110255375 | ACOUSTIC WAVE TRANSDUCER AND SONAR ANTENNA WITH IMPROVED DIRECTIVITY - The invention relates to an acoustic wave transducer that includes at least one electroacoustic motor ( | 10-20-2011 |
| 20120163131 | Mono-directional Ultrasound Transducer for Borehole Imaging - Devices and methods to generate a mono-directional ultrasonic wave are provided. An ultrasonic sensor configured to emit a substantially mono-directional ultrasonic wave includes a first piezoelectric element and a second piezoelectric element. The first piezoelectric element is configured to generate a first ultrasonic wave propagating in a first direction and a second ultrasonic wave propagating in a second direction which is different from the first direction. The second piezoelectric element is located and configured to absorb the second ultrasonic wave, and is configured to convert an energy of the absorbed second ultrasonic wave into an electrical energy. | 06-28-2012 |
| 20120213036 | Electroacoustic Transducer, in Particular Transmitting Transducer - An electroacoustic transducer, in particular a transmitting transducer for sonar systems, is disclosed, comprising two end caps that are arranged at a fixed distance from each other, multiple bars which are braced between the two end caps and the ends of which are attached to the end caps next to each other in the peripheral direction, and an elastic shell that externally encloses the bars. In order to significantly reduce the weight of the transducer and simplify production, composite modules are attached to the bars so as to excite vibrations. Each composite module has electrode structures that include spaced-apart electrodes and are arranged on at least two film layers made of insulating material, and spaced-apart piezoceramic fibers which are arranged between the film layers and are contacted by the electrodes on opposite longitudinal sides. | 08-23-2012 |
| 20130114378 | Widebeam Acoustic Transducer - An acoustic transducer for producing sonar waves features a piezoelectric structure with a radiating surface. A plurality of elements is attached to the radiating surface, and at least two of the plurality of elements have different acoustic properties. The acoustic transducer is designed for a wider beam angle for a thickness vibration mode while maintaining other desired vibration frequencies, maximum input power and low cost. | 05-09-2013 |
| 20130258814 | Ultrasound System and Method of Manufacture - An ultrasound system and a method of manufacturing an ultrasound system comprising a base comprising a bore; a prismatic segment, coupled to the base, that defines a set of surfaces surrounding the bore; a set of ultrasound transducer panels configured to emit ultrasound signals in a radial direction, each ultrasound transducer panel in the set of ultrasound transducer panels coupled to at least one surface of the set of surfaces, and an interconnect coupling a first ultrasound transducer panel in the set of ultrasound transducer panels to a second ultrasound transducer panel in the set of ultrasound transducer panels, wherein the interconnect facilitates coupling of the first ultrasound transducer panel and the second ultrasound transducer panel to the prismatic segment. | 10-03-2013 |
| 20140029386 | Apparatus and Methods of Tuning and Amplifying Piezoelectric Sonic and Ultrasonic Outputs - An apparatus and method associated with amplifying piezoelectric sonic and ultrasonic outputs is presented which provides high power output from piezoelectric devices, especially at high ultrasonic frequencies, in open air, which mitigates or eliminates overheating of the piezoelectric devices when stimulated at or near their peak outputs for extended periods. In addition, the invention provides a means of amplifying a piezoelectric sonic and ultrasonic device if a desired output power exceeds a normal maximum capability of the piezoelectric device. | 01-30-2014 |
| 20140219063 | MICROMACHINED ULTRASONIC TRANSDUCER DEVICES WITH METAL-SEMICONDUCTOR CONTACT FOR REDUCED CAPACITIVE CROSS-TALK - Embodiments reduce capacitive cross-talk between micromachined ultrasonic transducer (MUT) arrays through grounding of the substrate over which the arrays are fabricated. In embodiments, a metal-semiconductor contact is formed to a semiconductor device layer of a substrate and coupled to a ground plane common to a first electrode of the transducer elements to suppress capacitive coupling of signal lines connected to a second electrode of the transducer elements. | 08-07-2014 |
| 367158000 | Head and tail mass | 1 |
| 20090207696 | HYBRID TRANSDUCER - An embodiment of the invention is directed to a hybrid geometry type acoustic transducer. A hybrid geometry type acoustic transducer as embodied herein leverages different type transducer physical configurations. More specifically, embodiments of the hybrid transducer combine specific features of traditional Tonpilz resonators and PZT-composite transducers to exploit the beneficial characteristics of both. The outward construction of an embodied hybrid transducer mimics a Tonpilz resonator incorporating a headmass and a tailmass sandwiching a piezoelectric active material. However, rather than using a conventional ceramic ring stack or plate form of active material, a layer of diced or “pillared” active material is provided between the headmass and the tailmass with no filler material other than a gas, such as air, for example, or others, or a vacuum environment. Acoustic projectors constructed using this invention benefit with higher bandwidth and efficiency due to coupling loss that is lower than in prior designs. Likewise, when a hydrophone is constructed using aspects of this invention, exceptional hydrophone figure of merits are obtained. A method for making a hybrid transducer is described. | 08-20-2009 |
| 367159000 | Elongated cylindrical element | 3 |
| 20080219101 | Acoustic Projector Having Minimized Mechanical Stresses - An acoustic projector which includes an outer shell ( | 09-11-2008 |
| 20130315037 | LOW FREQUENCY ELECTRO ACOUSTIC TRANSDUCER AND METHOD OF GENERATING ACOUSTIC WAVES - An electroacoustic transducer submersible in an immersion fluid ( | 11-28-2013 |
| 20140056110 | ACOUSTIC SOURCE FOR GENERATING AN ACOUSTIC BEAM - An acoustic source for generating an acoustic beam includes a housing; a plurality of spaced apart piezo-electric layers disposed within the housing; and a non-linear medium filling between the plurality of layers. Each of the plurality of piezoelectric layers is configured to generate an acoustic wave. The non-linear medium and the plurality of piezo-electric material layers have a matching impedance so as to enhance a transmission of the acoustic wave generated by each of plurality of layers through the remaining plurality of layers. | 02-27-2014 |
| 367160000 | Bending type | 1 |
| 20110075521 | ACOUSTIC TRANSDUCER - An acoustic transducer that enables acoustic radiation at a low frequency and that also improves efficiency of the acoustic radiation into liquid is provided. The acoustic transducer according to the present invention includes bending vibration module 7 that is formed by at least one bending oscillating body 1 that has at least one plate type piezoelectric resonator 2 and diaphragm 3, and supporting member 9 for supporting bending vibration module 7. A plurality of bending vibration modules 7 are cylindrically arranged, and supporting members 9 radially protrude from shaft 8 provided at the center of the cylindrically arranged bending vibration modules 7 and are joined with the ends of diaphragms 3 of adjoining bending vibration modules 7. | 03-31-2011 |
| 367162000 | With resonant or damping structure | 4 |
| 20100020646 | Ultrasonic transducer with improved method of beam angle control - An ultrasonic transducer utilizes an acoustic transmission line to increase the sensitivity of both the transmitting response and the receiving response. The resonant element of the transducer could employ a ceramic disc operating in the radial resonance mode for its transduction means, or it could be a half wavelength resonator utilizing a forward transmission line, a rear transmission line, and a non-resonant ceramic for transduction. The shape of the forward transmission line is designed to generate the desired acoustic radiation pattern at the frequency of resonance, which could be a broad or narrow conical beam or a fan shaped beam. A sealed housing structure is disclosed that contains the forward transmission line that is acoustically disconnected from the rest of the housing. This housing provides improved environmental protection and allows for easy mounting of the transducer without effecting its electroacoustic response characteristics. | 01-28-2010 |
| 20100157741 | ACOUSTIC ISOLATOR - An acoustic isolator for use with tubular assemblies such as drillpipe or production tubing comprising an acoustic wave transmitter, the acoustic isolator comprising, in series connection, an odd integer λ/4 multiple tuning bar of first acoustic impedance adjacent the acoustic wave transmitter, an odd integer λ/4 multiple reflector tube of second acoustic impedance, and a snubber of third acoustic impedance, wherein there is an acoustic impedance mismatch between the odd integer λ/4 multiple tuning bar and the odd integer λ/4 multiple reflector tube and an acoustic impedance mismatch between the odd integer λ/4 multiple reflector tube and snubber, such that a ‘down’ wave propagated toward the isolator is reflected back substantially in phase with an ‘up’ wave propagated from the acoustic wave source away from the isolator. Furthermore, the acoustic isolator is similarly effective in reflecting ‘up’ propagating waves originating from below the isolator, hence further protecting the acoustic wave source from possible deleterious interference. | 06-24-2010 |
| 20110122731 | TRANSDUCER DEVICE HAVING COUPLED RESONANT ELEMENTS - A transducer device includes a coupling cavity, a first resonant element and a second resonant element. The first resonant element is coupled to the coupling cavity and configured to send or receive acoustic signals. The second resonant element is coupled to the coupling cavity and configured to modify a frequency response of the first resonant element via the coupling cavity. | 05-26-2011 |
| 20140050054 | MULTILAYER BACKING ABSORBER FOR ULTRASONIC TRANSDUCER - A multilayer backing absorber for use with an ultrasonic transducer comprises a plurality of absorber elements, each absorber element having at least one metal layer and at least one adhesive layer, wherein the backing absorber is adapted to be coupled to a vibrating layer of the ultrasonic transducer. | 02-20-2014 |
| 367164000 | Single element having a plurality of electrodes | 3 |
| 20090303839 | STRESS-BIASED CYMBALS INCORPORATING A SHAPE MEMORY ALLOY - A flextensional transducer, including a generally disc-shaped piezoelectric member having a generally flat top surface and a generally flat parallel bottom surface, a top electrode formed on the top surface, a bottom electrode formed on the bottom surface, a top endcap operationally connected to the top surface, and a bottom endcap operationally connected to the bottom surface. The top and bottom endcaps are formed of shape memory material. The endcap exerts a radial stress upon the generally disc-shaped piezoelectric member. | 12-10-2009 |
| 20130294203 | Focused Acoustic Transducer - A focused acoustic transducer suitable for use in a downhole environment is disclosed. At least some embodiments employ a disk of piezoelectric material with low planar coupling and low Poisson's ratio mounted on a backing material and sealed inside an enclosure. The piezoelectric material disk has a pattern of electrodes deposited on an otherwise smooth, ungrooved surface. Despite the lack of grooves, the material's low planar coupling and low Poisson's ratio enables the electrodes to operate in a phased relationship to provide and receive focused acoustic pulses. Moreover, the elimination of deep cuts offers a much lower cost of construction. The electrode material may be any conductive material, though silver and silver alloys are contemplated. The patterning of electrodes can occur during the deposition process (e.g., using a silk-screen or other printing technique) or afterwards (e.g., mechanically or chemically with an etch technique that uses a pre- or post-deposition photoresist layer). | 11-07-2013 |
| 20220141565 | ACOUSTIC TRANSDUCER AND MANUFACTURING METHOD THEREOF - The present disclosure provides an acoustic transducer, including: a base substrate and a plurality of acoustic transducer elements located on the base substrate. The acoustic transducer element includes: a switch and an acoustic transducer unit. A first terminal of the switch is electrically connected to a control signal line, and a second terminal of the switch is electrically connected to the acoustic transducer unit located in the same acoustic transducer element as the switch. The switch is configured to control connection and disconnection between the acoustic transducer unit located in the same acoustic transducer element as the switch and the control signal line. An embodiment of the present disclosure further provides a method for manufacturing the acoustic transducer. | 05-05-2022 |
| 367165000 | Specific support structure | 1 |
| 20080212408 | Ultrasonic Rod Transducer - An ultrasonic rod transducer having a heat transfer element for more efficient thermal coupling to a piezoelectric transducer. The heat transfer element enables reduced thermal resistance to the surrounding atmosphere or to the housing, and thus to the bath in the case of immersed rod transducers. | 09-04-2008 |
| 367166000 | Liquid filled | 1 |
| 20120170422 | HYDROPHONE AND PRESSURE BALACING DEVICE FOR USING FOR HYDROPHONE - A sound sensor, a hydrophone including the sound sensor, and a pressure balancing device for using for the hydrophone are provided. The hydrophone includes: a sensor including a sensing part and a pressure balancing part; a printed circuit board (PCB) that is electrically connected to the sensor; a case that houses the sensor and the PCB and that has an opening at one side thereof; an elastic membrane that covers the opening of the case; and a signal line that is electrically connected to the PCB to be extended to the outside of the case. The pressure balancing part includes a diaphragm of a thin film and a support that supports the diaphragm. A pressure balancing hole is formed at one side of the pressure balancing part, and at the inside of the pressure balancing part, a channel that is connected to the pressure balancing hole is formed, and a compressible gas is filled in the channel. | 07-05-2012 |
