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An armor with rollers is provided that enables a user to move in all positions by rolling on a hard and smooth surface while constantly varying his bearing points on the ground.
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| Number | Title | Issue Date |
| 8107323 | Boomer for marine seismic survey Provided is a boomer that is a type of a seismic source generator for marine seismic survey. In the boomer for marine seismic survey according to the exemplary embodiment of the present invention, a plurality of transducer coupling parts capable of separating and co... | 01/31/2012 |
| 7688681 | Ultrasonic rod transducer From the foregoing, it can be seen that an ultrasonic rod transducer is provided that has a heat transfer element that is thermally well coupled to the piezoelectric transducer. It provides for the thermal resistance to the surrounding atmosphere or to the housing a... | 03/30/2010 |
| 7382689 | Flexible hydrophone A hydrophone includes a body formed of a flexible, plastic material. The body includes a plurality of channels and each channel may have one or more wells. The wells are adapted to receive an active element which includes mounting hardware. The mounting hardware inc... | 06/03/2008 |
| 7349293 | Pressure control apparatus and rotation drive mechanism A pressure control apparatus according to the present invention is comprised of a magnetostrictive element section disposed between respective one ends of rotating rods which have the one ends thereof arranged on the same axis in a state connected to each other such... | 03/25/2008 |
| 7339494 | Acoustic telemetry transceiver One embodiment includes an apparatus that includes a piezoelectric transducer to generate an acoustic signal that is to modulate along a mandrel, wherein the piezoelectric transducer includes at least one piezoelectric element and at least one electrode that is with... | 03/04/2008 |
| 7280668 | Ceramic metal matrix diaphragm for loudspeakers This invention provides a method of manufacturing speaker diaphragm for a loudspeaker that has a composite material formed of two layers of ceramic material separated by a light metal substrate and where the core is formed by stamping a sheet of standard gauge alumi... | 10/09/2007 |
| 7270214 | Method and apparatus for reducing and extracting wing-tip vortex energy The present invention provides an apparatus and a method for reducing wing-tip vortex energy during seismic exploration. The apparatus includes a vortex concentrator of deployed proximate a tip of a hydrofoil and a vortex reducing device deployed proximate the vorte... | 09/18/2007 |
| 7236427 | Vessel hull transducer modular mounting system A vessel hull transducer modular mounting system enables transducers to be replaced and upgraded without necessitating the further modification of the hull and thus not necessitating the dry-docking of the vessel. A further feature includes the ability to reduce and... | 06/26/2007 |
| 7224288 | Link module for a downhole drilling network A repeater is disclosed in one embodiment of the present invention as including a cylindrical housing, characterized by a proximal end and a distal end, and having a substantially cylindrical wall, the cylindrical wall defining a central bore passing therethrough. T... | 05/29/2007 |
| 7195069 | Method and apparatus for backing off a tubular member from a wellbore A back-off tool for use in a tubular member disposed inside a wellbore. The back-off tool includes a housing and at least one sonic wave generator mounted within the housing. The sonic wave generator is configured to generate a plurality of sonic waves. ... | 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 |
| 7170822 | Laminated piezoelectric transducer and method of manufacturing the same The invention is illustrated as an underwater acoustic transducer comprising an active acoustic element for transducing sound and electrical signals; a front and rear housing element disposed on each side of the active acoustic element to define a corresponding fron... | 01/30/2007 |
| 7163065 | Combined telemetry system and method Telemetry systems and methods are disclosed for real time communication of information between multiple positions in a wellbore. ... | 01/16/2007 |
| 7120087 | Electronics-carrying module An electronic-carrying module (640), for example for use with a seismic data acquisition cable (400), is disclosed. The preferred electronic-carrying module (640) includes, first, an electronics carrier (106) having access means (107 | 10/10/2006 |
| 7104268 | Megasonic cleaning system with buffered cavitation method A wafer cleaning method and system including a combined high frequency signal, a low frequency signal, and in one embodiment a biased voltage signal, allows cleaning particles and impurities off of fine-structured wafers, through application of an acoustic field to ... | 09/12/2006 |
| 7038356 | Mechanical-to-acoustical transformer and multi-media flat film speaker A mechanical-to-acoustical transducer has at least one actuator, preferably a piezo motor, that is coupled, generally perpendicularly, to one edge of a diaphragm formed from a thin, flexible sheet material. The diaphragm is fixed at a point spaced from the actuator ... | 05/02/2006 |
| 7015629 | Additional contacting for an electrical component and piezoelectric component in the form of a multilayer structure An additional contacting (30) for a piezoelectric component (10) is formed as a multilayer structure, wherein the piezoelectric component (10) is formed by a stack (16) of alternatingly arranged piezoelectric ceramic layers (11) an... | 03/21/2006 |
| 7009326 | Ultrasonic vibration apparatus use as a sensor having a piezoelectric element mounted in a cylindrical casing and grooves filled with flexible filler An ultrasonic vibration apparatus includes a casing having a vibration face, a piezoelectric element mounted in the casing, and a disk-like vibration plate supported at a position along a concentric circle differentiating two regions, an inner region and an outer re... | 03/07/2006 |
| 6998761 | Piezoelectric assembly A piezoelectric assembly, a method for producing a structural unit with a prestressed piezoelectric actuator and a method for producing a hollow body for prestressing the piezoelectric actuator include an actuator pushed into a spring sleeve and force-lockingly and/... | 02/14/2006 |
| 6956791 | Apparatus for receiving downhole acoustic signals The invention relates to an apparatus for receiving downhole acoustic signals, processing the signals into electric signals, then transmitting the signals wirelessly to a remote above-surface monitoring station. The apparatus is mountable to an above-surface rotatab... | 10/18/2005 |
| 6920085 | Downlink telemetry system A downlink telemetry system providing improved apparatus and methods for communicating instructions via pressure pulses from surface equipment to a downhole assembly. The apparatus comprises a surface transmitter for generating pressure pulses, a control system, and... | 07/19/2005 |
| 6856580 | Naval-hull mounted sonar for naval ship The invention relates to hull sonars for a naval vessel. The hull sonar includes associating a transmitter formed by cylindrical rings with a receiver formed by at least two sets of hydrophones distributed over two transparent cylindrical surfaces that are coaxial w... | 02/15/2005 |
| 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 |
| 6690622 | Portable remote-controlled fish locating system A portable remote-controlled fish finding system for allowing users to scan a wide area of the body of water away from a shore, dock and boat to find fish. The portable remote-controlled fish finding system includes a sonar assembly being floatable upon a... | 02/10/2004 |
| 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 |
| 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 |
| 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 |
| 6545948 | Submersible loudspeaker A submersible loudspeaker including an electro-acoustic transducer which accepts the electrical signal from the audio system and delivers sound waves generated by piezoelectric elements in proportion to the signal applied to it. The speaker primarily comp... | 04/08/2003 |
| 6483776 | Seismic cable with sensor elements being heavier than the cable Seismic cable for placing on the sea bottom comprising two or more seismic sensor units adapted to detect vibrations in the sea floor and being separated by chosen lengths of cable. The cable is characterize in that the sensor units are substantially heav... | 11/19/2002 |
| 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 |
| 6356511 | Low distortion ratio hydrophone Very low distortion hydrophone comprising at least one pair of sensitive elements (6 and 8) of piezoelectric type (for example and not limitatively), associated with at least one of the opposite flexible faces of a housing (1) formed by assembling cups (2... | 03/12/2002 |
| 6345014 | Collapsible annular acoustic transmission antenna Acoustic transmitting antennas in the form of circular rings. Several circular rings which can be dismantled of a known type are superimposed in a stack. The stack is terminated at each end by two profiled annuli. The threaded tie-rods traverse the stacks... | 02/05/2002 |
| 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 or both of the problems causing the fatigue, tensile forc... | 10/30/2001 |
| 6188647 | Extension method of drillstring component assembly A method of assembling transducer tools for down-hole applications wherein piezoelectric elements in the tools are pre-stressed by mechanically stretching an elastic mandrel about which the piezoelectric elements are positioned and subsequently releasing ... | 02/13/2001 |
| 6163505 | contact member for an ultrasonic transducer The invention relates to an ultrasonic transducer with a pot-shaped oscillating element, which is mounted in a transducer housing and which bears a piezoelectric disc on its bottom. The invention simplifies the electric contact-making between the connecti... | 12/19/2000 |
| 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 together by bolts or pins or any other appropriate means. E... | 11/21/2000 |
| 6147932 | Acoustic transducer An active acoustic transducer tool for use down-hole applications. The tool includes a single cylindrical mandrel including a shoulder defining the boundary of a narrowed portion over which is placed a sandwich-style piezoelectric tranducer assembly. The ... | 11/14/2000 |
| 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 piezoelectric transducer. One or more piezoelectric components can b... | 05/30/2000 |
| 6018493 | Sonar suspension apparatus Sonar suspension apparatus comprising a flotation buoy and an underwater sonar array connected to the flotation buoy by a suspension cable, wherein the sonar array comprises a plurality of transducer-carrying elongate members including at least one rigid ... | 01/25/2000 |
| 5889731 | Vibration detector A vibration detector is disclosed. The vibration includes a ring (2) closed at its opposite ends by two ring ends (3, 4), that is externally covered with a sheath (11) made from an elastic material transparent to vibrations, two supporting plates (5) with... | 03/30/1999 |
