Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 8125852 | Methods and systems for seismic signal detection Methods and systems utilizing seismic sensors configured or designed for use in seismic signal detection. An electrical current is applied to a seismic sensor such that the moving coil is located at a neutral position relative to the magnetic field in the seismic se... | 02/28/2012 |
| 8009518 | Ultrasonic sensor with piezoelectric elements and vibration isolator An ultrasonic sensor includes a transmitting device, receiving devices arranged in an array, and a circuit device. One receiving device is configured as a reference receiving device. The circuit device includes a reference signal generator and first and second synch... | 08/30/2011 |
| 7529154 | Hybrid thin film heterostructure modular vibration control apparatus and methods for fabrication thereof Microelectromechanical systems (MEMS) include critical devices for various highly sensitive applications. However, MEMS operation may be impaired by vibration. A modular vibration control pedestal for integration with a MEMS is provided according to embodiments of t... | 05/05/2009 |
| 7216737 | Acoustic isolator between downhole transmitters and receivers Apparatus and methods for acoustically isolating logging tool receiver and transmitter sections. One or more modular isolators is arranged between the receiver and transmitter sections. The modular isolators comprise a high tensile strength while also providing for ... | 05/15/2007 |
| 7203133 | Ultrasound sensor system The invention relates to an ultrasound sensor system, especially for a welding electrode, comprising a sensor (5, 6, 7, 10) which, during the detection process, passes ultrasonic waves of a desired oscillation mode into areas to be detected and/or detects ult... | 04/10/2007 |
| 7196971 | Method and apparatus for damping an ultrasonic transducer suitable for time of flight ranging and level measurement systems A method and apparatus for damping an ultrasonic transducer suitable for time of flight ranging and level measurement systems. The ultrasonic transducer comprises a damping component which absorbs vibrations in the transducer to reduce the ringing effect. The dampin... | 03/27/2007 |
| 7180225 | Piezoelectric vibrator A piezoelectric vibrator having excellent shock resistance and high reliability is offered. The centers of first and second piezoelectric vibrating plates are supported by pillars on a main surface of an enclosure and nearly or substantially parallel to the main sur... | 02/20/2007 |
| 7104357 | Device for generating focused elastic waves in a material medium such as underground, and method using same An electromechanical device for generating elastic waves in a material medium such as the subsoil in a frequency range where the wavelengths of the waves generated are great in view of the dimensions of the device, and method of implementation. The device comprises ... | 09/12/2006 |
| 7105986 | Ultrasound transducer with enhanced thermal conductivity A composite structure of a backing material with enhanced conductivity for use in a transducer is presented. The composite structure includes a plurality of layers of backing material alternatingly arranged with a plurality of thermal conductive elements, wherein th... | 09/12/2006 |
| 7046583 | High-power transmission acoustic antenna The present invention relates to high-frequency antennas with high transmission power. The invention consists in making the backing layer of such an antenna with a heat-conductive foam and enables the transmission power to be appreciably doubled. ... | 05/16/2006 |
| 7032707 | Acoustic isolator downhole applications A plurality of heavy mass irregularities attached to an inner wall of the drill collar attenuate waves traveling through the collar. The plurality of heavy mass irregularities are spaced and sized for the maximum attenuation of acoustic pulses in a predetermined fre... | 04/25/2006 |
| 7028806 | Acoustic isolator for downhole applications An apparatus for performing acoustic investigations while drilling a borehole in a subsurface geological formation comprises a longitudinally extending assembly conveyed in the borehole on a drilling tubular. The assembly and the drilling tubular have a drilling flu... | 04/18/2006 |
| 7030536 | Micromachined ultrasonic transducer cells having compliant support structure A micromachined ultrasonic transducer array comprising a multiplicity of cMUT cells built on a substrate. Each cMUT cell comprises a compliant support structure built on the substrate, a membrane supported over a cavity by the compliant support structure, a first el... | 04/18/2006 |
| 7026943 | Acoustic wave ice and water detector An acoustic wave sensor utilizes one or more acoustic waves trapped in an acoustic wave cavity to detect the presence of one or more substances on a surface of the acoustic wave cavity. To detect the presence of ice, a trapped torsional acoustic wave is used. To det... | 04/11/2006 |
| 7021145 | Acoustic transducer An acoustic transducer for measuring a property of a fluid includes an acoustic pulse generator and buffer assembly. The buffer assembly is between the pulse generator and the fluid. The buffer assembly is composed of a core and a sleeve shrink fitted over the core ... | 04/04/2006 |
| 7019439 | High power ultrasonic transducer with broadband frequency characteristics at all overtones and harmonics A transducer assembly for receiving a stimulating signal and producing ultrasound therefrom at one or more frequencies, over an ultrabroad bandwidth at each frequency, includes a front mass disposed about a central axis, and a back mass disposed about the central ax... | 03/28/2006 |
| 7017415 | Apparatus for sensing pressure fluctuations in a hostile environment A pressure sensor (52) for a harsh environment such as the combustion chamber (58) of a gas turbine engine (50). The pressure sensor includes an acoustic waveguide (60) having a sensing portion (66) exposed to the combustion gas in... | 03/28/2006 |
| 6996030 | Apparatus and method for minimizing reception nulls in heterodyned ultrasonic signals A focal point reflector is used in conjunction with a dual heterodyne circuit to reduce reception nulls that can occur when performing ultrasonic measurements. The focal plane reflector is a flat non-porous or reflective material, such as printed circuit board (PCB)... | 02/07/2006 |
| 6987445 | Water resistant audible signal The invention is an modified audible signal, such as a piezoelectric noise-making and audible signaling device, which further includes a hydrophobic covering material, such as polytetrafluoroethylene (PTFE). The hydrophobic covering material is known to be water res... | 01/17/2006 |
| 6950373 | Multiply resonant wideband transducer apparatus An electro-mechanical transducer is disclosed, which provides a wideband response by activating successive multiple resonant frequencies in a way which provides additive output between the resonant frequencies. A three mode wideband high output transducer is also di... | 09/27/2005 |
| 6862254 | Microfabricated ultrasonic transducer with suppressed substrate modes The present invention provides a microfabricated acoustic transducer with suppressed substrate modes. The modes are suppressed by either thinning the substrate such that a longitudinal ringing mode occurs outside of the frequency band of interest or by applying a ju... | 03/01/2005 |
| 6849053 | Shock wave source with a wave damping coil carrier A shock wave source has a coil carrier, a coil, having a metallic membrane separated from the coil in insulating fashion for generating shock waves. The coil carrier is formed of a material that damps the formation and/or the propagation of audible acoustic waves in... | 02/01/2005 |
| 6837859 | Shock wave source with a coil carrier having a non-circular contour A shock wave source has a coil carrier, having a longitudinal axis, a coil and a metallic membrane separated from the coil in insulating fashion for generating shock waves. The coil carrier has a generated surface, a first cover surface facing toward the coil and a ... | 01/04/2005 |
| 6784600 | Ultrasonic membrane transducer for an ultrasonic diagnostic probe The invention is directed towards structures for use with micro-formed membrane ultrasonic transducers, and methods for fabricating the structures. In one embodiment, the transducer includes a planar member having a piezoelectric material and spaced apart electrodes... | 08/31/2004 |
| 6768702 | Baffled ring directional transducers and arrays The present invention relates to a directional electro-acoustic transducer and arrays of transducers of the cylindrical or ring electro-mechanical type in conjunction with a partial conformal acoustic baffle. Such a device has very desirable directional beam pattern... | 07/27/2004 |
| 6751162 | Seismic sensor A seismic sensor contains a geophone (4) disposed within a housing (12). The sensor is also provided with locking means (14, 19, 21) that can either lock the geophone 4 relative to the housing, or can allow the geophone to rotate within t... | 06/15/2004 |
| 6714484 | Microfabricated acoustic transducer with suppressed substrate modes A microfabricated acoustic transducer with suppressed substrate modes includes a diaphragm containing an upper electrode suspended above a substrate containing a lower electrode; the substrate may or may not contain electronic circuits. The substrate modes are suppr... | 03/30/2004 |
| 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 deposited on the first and second sides of the formed substrates. On... | 03/23/2004 |
| 6643221 | Structures and methods for damping tool waves particularly for acoustic logging tools In one aspect, the invention involves an acoustic logging tool for performing acoustic investigations of subsurface geological formations. In one embodiment, the tool comprises a generally longitudinally extending tool body adapted for positioning in a bo... | 11/04/2003 |
| 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 end walls. The projector has a one piece thin wall inwardl... | 05/20/2003 |
| 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 end walls. Each end wall close one end of flared open ende... | 05/20/2003 |
| 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 end walls. Each end wall close one end of open ended tubul... | 04/08/2003 |
| 6514618 | Multilayer backing material for 2-D ultrasonic imaging arrays A multilayer backing for an ultrasonic transducer array comprises at least two layers in contact with each other. The first layer is formed from a first composition comprising an epoxy resin base and a powder. The second layer is formed from a second comp... | 02/04/2003 |
| 6504795 | Arrangement of micromechanical ultrasound transducers The damping of membranes of ultrasound transducers in an arrangement occurs at the front side directly on the membranes by applying a polymer layer, whereby the working temperature dependent on the operating frequency of the ultrasound transducer lies wit... | 01/07/2003 |
| 6418960 | Ultrasonic enhancement for solvent purge of a liquid delivery system The present invention generally provides an apparatus and method for improving the process of purging a liquid delivery system used in integrated circuit manufacturing. The liquid delivery system comprises ultrasonic transducers mounted to various compone... | 07/16/2002 |
| 6400649 | Self biased transducer assembly and high voltage drive circuit An improved transducer arrangement for low frequency sonar projectors that convert electric signals to mechanically generated acoustic signals. In one embodiment the arrangement has both a convex flextensional transducer and a concave flextensional transd... | 06/04/2002 |
| 6166998 | Moulded transducer An electro-acoustic transducer is manufactured by forming a transducer assembly at least one piezoelectric element, electrodes contacting the element, and acoustic loading blocks, and applying successive superposed mouldings of material of differing acous... | 12/26/2000 |
| 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 |
| 6002648 | Slotted cylinder marine siesmic method and source A seismic method and system for generating seismic source energy in marine geophysical operations. A slotted housing is moveable by the actuation of piezoelectric elements to generate high power, low frequency seismic source signals. When the piezoelectri... | 12/14/1999 |
| 6002649 | Tapered cylinder electro-acoustic transducer with reversed tapered driver A slotted cylinder transducer is provided having a cylindrical metal or cosite material shell. A cylindrical piezoelectric driver is bonded to the inside of the shell with an opening corresponding to the slot. The shell thickness is tapered radially abou... | 12/14/1999 |
