| Patent Number |
Title Of Patent |
Date Issued |
| RE30109 |
Hydroacoustic apparatus and valving mechanisms for use therein |
October 9, 1979 |
| Impact tools are described which are capable of developing percussive forces for rock drilling and other repetitive high force applications. A hydroacoustic oscillator contained in such tools includes a hammer and a valve mechanism which is actuated by the hammer for controlling the flow |
| 6870795 |
Acoustic source array system module for underwater operation which can be installed on a motoriz |
March 22, 2005 |
| A small boat or launch such as a motorized reinforced hull inflatable boat provides a platform for an acoustic source array of airguns. The array is made up as a ladder structure in which the airguns are disposed horizontally between vertical support and umbilical lines, preferably with |
| 6771561 |
Sonar system especially for shallow water application such as in littoral environments |
August 3, 2004 |
| In order to optimize detection of targets from a broadband return, a multiplicity of narrow bands are matched-filter processed simultaneously in parallel. The band or bands which provide the best joint combination of target and propagation in response are used for target detection. |
| 6606958 |
Towed acoustic source array system for marine applications |
August 19, 2003 |
| A marine towed array has a plurality of tow bodies of positive buoyancy each containing a marine acoustic source, such as a vibrator source. Each tow body uses a reel containing an electro-mechanical tow cable connecting the sources, whereby reeling and unreeling of the cable, controlled |
| 6378951 |
Vibratory pavement breaker |
April 30, 2002 |
| An electrohydraulic pavement breaker system having cavities (28, 30) which are filled with hydraulic fluid (oil) or gas, and which provide mass spring system which is resonant at a frequency which is especially adapted for breaking and rubblizing concrete pavement. The resonant mass (18) |
| 6185156 |
Underwater acoustic impulse source |
February 6, 2001 |
| An acoustic transmission in an underwater environment having a spectrum (amplitude/frequency signature) of interest is generated by cyclically releasing energy which forms impulses which individually have spectral amplitudes principally near one end of the desired spectrum, but which |
| 5995452 |
System for generating and transmitting acoustic signals underwater |
November 30, 1999 |
| 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 strengths are essentially constant over the array length, but whose individual source pe |
| 5841733 |
Acoustic source array system for underwater operation |
November 24, 1998 |
| An improved acoustic source array system is provided by the invention to generate acoustic signals underwater. The system has an array of acoustic signal sources, such as air guns, towable while underwater behind a surface vessel. The array includes a plurality of these sources, and |
| 5515055 |
System for processing returns from a target from transmissions containing repeated signals to de |
May 7, 1996 |
| A signal processing system of reduced complexity over conventional banks of matched filters for each Doppler velocity of interest is responsive to a transmission which is in the form of a train of repeated Doppler invariant signals which are preferably phase continuous. The system utiliz |
| 5378951 |
Friction welder which produces orbital motion and drive therefor |
January 3, 1995 |
| An electromagnetically actuated friction welder produces orbital motion at interfaces between parts (usually of thermoplastic material) to bond the parts by fusion generated by friction. This welder can also be operated alternatively to produce reciprocating vibratory forces thereby prov |
| 5277744 |
Friction welder having a drive which produces orbital motion |
January 11, 1994 |
| An electromagnetically actuated friction welder produces orbital motion at interfaces between parts (usually of thermoplastic material) to bond the parts by fusion generated by friction. This welder can also be operated alternatively to produce reciprocating vibratory forces thereby prov |
| 5212490 |
Echo ranging system for detecting velocity and range of targets using composite doppler invarian |
May 18, 1993 |
| False target (reverberation, clutter, etc.) detection is suppressed in an echo ranging system (sonar or radar) in which target velocity and range are measured using a composite Doppler invariant-like signal having at least two segments, such as are present in a "rooftop" or "vee" HFM |
| 5212489 |
Echo ranging system for detecting velocity of targets using composite doppler invariant transmis |
May 18, 1993 |
| Target velocity and range are measured with high resolution in an echo ranging system (sonar or radar) using composite Doppler invariant signals consisting of at least two segments, such as "rooftop" or "vee" HFM signals, such composite signals having ambiguity functions that intersect |
| 5160393 |
Friction welder having an electromagnetic drive which produces orbital motion |
November 3, 1992 |
| An electromagnetically actuated friction welder produces orbital motion at interfaces between parts (usually of thermoplastic material) to bond the parts by fusion generated by friction. This welder can also be operated alternatively to produce reciprocating vibratory forces thereby prov |
| 4799201 |
Methods and apparatus for reducing correlation sidelobe interference in seismic profiling system |
January 17, 1989 |
| In seismic profiling systems utilizing sweeps of signals which change in repetition frequency during the transmission interval, interference results from a spurious correlation against an interfering sweep, usually produced by the first break reflection of a simultaneously transmitted |
| 4758997 |
Method and apparatus for the generation and transmission of signals for echo location and other |
July 19, 1988 |
| A transmission from a hydroacoustic source, especially for underwater geophysical exploration, is generated in accordance with two binary codes (provided by two pulse trains or sequences having two levels and which provide a spectrum of harmonically related components). One of these code |
| 4753316 |
Seismic source |
June 28, 1988 |
| A water gun seismic source for use in underwater environments has a sleeve valve (100) for opening a jet aperture (37, 101) to enable jets of pressurized water to be emitted for the generation of a seismic signal. The water is pressurized by a drive piston (3) which is reciprocated to a |
| 4729066 |
Method and apparatus for the generation and transmission of signals for echo location and other |
March 1, 1988 |
| A transmission which requires only a single source to transmit is generated in accordance with a code which is binary (a pulse train having two levels which produces a specific harmonic line spectrum). The pulses are generated by pulse time modulation of the position and duration of puls |
| 4695987 |
Hydroacoustic apparatus |
September 22, 1987 |
| A hydroacoustic transducer for generating and applying acoustic energy to a load coupling structure has a hydroacoustic amplifier with a driver stage and a power stage. The power stage includes a valve, which obtains high power conversion efficiency by operating to switch the flow of pre |
| 4663206 |
Stress relief and edge sealing of welded joints in plastics parts |
May 5, 1987 |
| In order to stress relieve exposed portions of plastic welds, and thereby reduce susceptability of such welds to solvent-induced crazing and cracking, the welded parts are formed with flanges extending outwardly therefrom. These flanges are at least partially joined during welding, t |
| 4628493 |
Sensor system with time division multiplexing telemetry |
December 9, 1986 |
| A seismic array containing a large number of seismic sensors, which may be optical hydrophones, has successive sections, each of which contains a subarray of sensor channels, interconnected by a fiber optic signal transmission line via telemetry modules. Synchronizing signals for ini |
| 4601927 |
Welding of plastic parts |
July 22, 1986 |
| Joints between thermoplastic parts are friction welded (e.g., as by vibration welding) or otherwise thermally welded in such a manner that a non-uniform temperature distribution results during welding which effectively blocks flash flow from the edge of the joint, and upon cooling, p |
| 4601768 |
Method and apparatus for treating plastic welds to relieve stresses therein |
July 22, 1986 |
| To relieve stresses in a plastic weld which may weaken the weld and increase its susceptibility to solvent-induced crazing or cracking, forces are applied to the weld zone (the interface between welded parts) after it has cooled to solid condition, but preferably when it is at a higher |
| 4569412 |
Seismic source |
February 11, 1986 |
| A seismic source operable in deep bore holes, and especially suitable for acoustic well logging and geophysical exploration, produces a controlled-spectrum seismic impulse. The source has a hammer which is hydraulically cocked through a hydraulic transformer into a hydraulic spring. |
| 4509170 |
Time division multiplex transmission of submultiplex sequences of signals from sections of a cha |
April 2, 1985 |
| Time Division Multiplex (TDM) telemetry of submultiplex sequences of signals which may be obtained from successive sections of sensors in a sensor array are transmitted synchronously by locking generators in each section, which determine the time slots in which samples of the sensor |
| 4381137 |
Optical fiber mode separation systems |
April 26, 1983 |
| When a multimode optical fiber is deformed in accordance with an input signal to be sensed, light from lower order core modes is coupled to higher order core modes. A lens assembly is provided which separates the light in the higher order core modes from the light remaining in the lower |
| 4348943 |
Hydraulic press apparatus |
September 14, 1982 |
| A fast acting hydraulically actuated ram (10) especially suitable for use in the punch head of a press uses a first ram area (28) to advance the ram until the load thereon increases, which occurs when punching is about to take place. Then a pressure actuated valve (22), which is responsi |
| 4313192 |
Optical transducer array system |
January 26, 1982 |
| An array of optical waveguide transducers, especially suitable for use in a multi-channel hydrophone seismic streamer, contains optical waveguides which are deformed in response to the parameter being sensed (underwater acoustic energy in the case of the seismic streamer). Two optical si |
| 4294513 |
Optical sensor system |
October 13, 1981 |
| An optical transducer with an optical waveguide having two paths for the propagation of light is deformed in response to acoustical pressure variations or other parameters to be sensed to modulate the amplitude of the light propagated along the two paths in opposite polarities. The light |
| 4207962 |
Methods and apparatus for use in generating and transmitting acoustic signals |
June 17, 1980 |
| Methods and apparatus describedmaximize, within a predetermined frequency band, the continuous or near-continuous transmission of broadband acoustic power into a medium having a finite tensile strength such as water or earth. Such methods and apparatus also minimize, for a given broadban |
| 4204278 |
Methods and apparatus for the generation and transmission of signals for echo location and other |
May 20, 1980 |
| Quasi periodic pulse trains are generated and swept in repetition frequency over an octave. Spectral harmonics of the pulse trains which prevent the trains from having a constant or "flat" power spectrum over a frequency range much greater than an octave are reduced or eliminated by adju |
| 4188610 |
Method of and apparatus for the generation and transmission of signals for echolocation and othe |
February 12, 1980 |
| Methods and apparatus are described for generating and transmitting signals in accordance with a sequence which defines the time relationship of the signals. Each signal has a band width covering several octaves and may be a pulse. During a transmission interval the repetition frequencie |
| 4187917 |
Pile driver |
February 12, 1980 |
| The driving power and driving rate of a pile driver hammer is increased without increasing the overall weight of the hammer through the use of a hydraulic spring transformer which is disposed between the ram and the pile in the housing of the hammer and presents a Q at the frequency wher |
| 4166507 |
Percussive drilling apparatus |
September 4, 1979 |
| A hydraulic rotary percussive drill which is adapted to operate as a drill for installing rock bolts in mines is described. The drill is configured so that the shank (which holds the drill steel and bit) forms a right angle with the impact mechanism, thereby reducing the height of the dr |
| 4155287 |
Hydraulically operated impact devices |
May 22, 1979 |
| Hydraulic actuation of a device for delivering impact energy to a load, such as a pile driver, is provided by a hydraulically operated oscillator having a piston which is reciprocal in a cylinder under hydraulic forces developed by pressurized hydraulic fluid in the cylinder which is swi |
| 4153135 |
Apparatus for the generation of acoustic signals in marine environments |
May 8, 1979 |
| A source is described capable of generating acoustic signals under water at high cycling rates suitable for providing seismic signals of controlled amplitude and spectral shape and with precise timing for geophysical exploration. The source has a pair of radiating pistons in a housing |
| 4147228 |
Methods and apparatus for the generation and transmission of seismic signals |
April 3, 1979 |
| Methods and apparatus for generating and transmitting seismic signals for the purpose of seismic exploration are disclosed. The signals are force pulses shaped to have a spectrum constrained to the range of frequencies which are necessary for penetration to desired depths within the eart |
| 4143585 |
Impact tool |
March 13, 1979 |
| An impact tool is described which is capable of developing percussive forces for rock drilling, pile driving, seismic exploration and other repetitive high force applications. The tool contains a hammer and a valve which may be hydraulically actuated so as to oscillate; repetitively |
| 4131178 |
Seismic source for use under water |
December 26, 1978 |
| A seismic source is described which drives one or more jets of high velocity water into an underwater environment and then abruptly terminates the jets. The momentum of the free jet columns generate vapor cavities in the water away from the housing of the source which cavities collapse |
| 4086122 |
Hydroacoustic welder |
April 25, 1978 |
| Apparatus is described for welding of thermoplastic parts and the like where the heat to melt the surface or surfaces to be joined is produced by friction during high frequency rubbing. The parts are adapted to be placed on a platen which enables the mating surfaces of the parts to be br |
| 4077304 |
Impact tools |
March 7, 1978 |
| Impact tools are described which are capable of developing percussive forces for rock drilling, seismic exploration and other repetitive high force applications. Each of the tools contains a hammer and a valve which may be hydraulically actuated so as to constitute a hydroacoustic os |
| 4013319 |
Tunneling machine with massive guide for impact tools |
March 22, 1977 |
| A tunneling machine is described which uses an array of impact tools for cutting a deep kerf that defines the wall of the tunnel. The impact tool provides impact blows through drill steels to which drill bits are attached. A substantial portion of the drill steels extend through webs |
| 4005637 |
Hydroacoustic apparatus and valving mechanisms for use therein |
February 1, 1977 |
| Impact tools are described which are capable of developing percussive forces for rock drilling and other repetitive high force applications. A hydroacoustic oscillator contained in such tools includes a hammer and a valve mechanism which is actuated by the hammer for controlling the flow |
| 3991655 |
Hydroacoustic apparatus and valving mechanisms for use therein |
November 16, 1976 |
| Impact tools are described which are capable of developing percussive forces for rock drilling and other repetitive high force applications. A hydroacoustic oscillator contained in such tools includes a hammer and a valve mechanism which is actuated by the hammer for controlling the flow |
| 3978940 |
Acoustic source |
September 7, 1976 |
| A broadband low frequency source suitable for deep sea applications without pressure compensation is disclosed. The source utilizes hydraulically powered flexural disc radiators which are sized to small fractions of the generated wavelength. Inertance is applied hydraulically to the radi |
| 3969987 |
Hydroacoustic apparatus and valving mechanisms for use therein |
July 20, 1976 |
| Impact tools are described which are capable of developing percussive forces for rock drilling and other repetitive high force applications. A hydroacoustic oscillator contained in such tools includes a hammer and a valve mechanism which is actuated by the hammer for controlling the flow |
| 3969984 |
Hydroacoustic apparatus and valving mechanisms for use therein |
July 20, 1976 |
| Impact tools are described which are capable of developing percussive forces for rock drilling and other repetitive high force applications. A hydroacoustic oscillator contained in such tools includes a hammer and a valve mechanism which is actuated by the hammer for controlling the flow |
| 3946831 |
Acoustic transmitter |
March 30, 1976 |
| A transmitter of acoustic energy which propagates that energy in a directional manner is described. An acoustic signal generator is connected at one end of an acoustic transmission line which exhibits a certain characteristic impedance. The line has a number of ports spaced along its |
