Scan From Within Object Patents (Class 73/623)
  • Patent number: 4891972
    Abstract: A method and device for the examination of a joint between a hollow steel shaft and a piece joined to the steel hollow shaft of a composite camshaft using ultrasonic examination. In the ultrasonic examination, the composite camshaft is put into a liquid and a probe of an ultrasonic search unit is inserted inside of the hollow steel shaft. The ultraonic examination of the joint is performed from inside of the hollow steel shaft. According to the ultrasonic examination, any kind of joint of the composite camshaft is possible, because a distance from an inside surface of the hollow steel shaft to the joint is constant. In addition, since the probe does not contact the inside surface of the hollow steel shaft, the probe is not consumed due to abrasion.
    Type: Grant
    Filed: October 6, 1988
    Date of Patent: January 9, 1990
    Assignee: Nippon Piston-Ring Co., Ltd.
    Inventors: Takashi Kawaguchi, Yoshiaki Fujita, Satoshi Kawai
  • Patent number: 4876672
    Abstract: An ultrasonic logging tool (borehole televiewer) which utilizes a rotating transducer which is exposed directly to the fluids in the borehole during logging operations.
    Type: Grant
    Filed: March 1, 1988
    Date of Patent: October 24, 1989
    Assignee: Atlantic Richfield Company
    Inventors: Steven G. Petermann, Thomas Schasteen
  • Patent number: 4864862
    Abstract: An immersion based ultrasonic inspection system is disclosed which is used to interrogate the bore and near bore material of turbine and generator rotors by passing ultrasonic search units through the rotor bore. This system utilizes variable focus array inspection transducers in a shear mode inspection of the near bore material. The flaw location method includes recording calibration transit times and transducer locations for calibration holes from which refraction angles, and material velocities are determined. When a flaw is detected the surface time for a bore surface reflection, the flaw reflection time and transducer position are used to determine the position of the flaw.
    Type: Grant
    Filed: February 25, 1988
    Date of Patent: September 12, 1989
    Assignee: Westinghouse Electric Corp.
    Inventors: Lawrence D. Nottingham, Thomas E. Michaels, Jennifer E. Michaels
  • Patent number: 4856337
    Abstract: Both an apparatus and a method for simultaneously inspecting the walls of a tube with both ultrasonic and eddy current probes is disclosed herein. The apparatus generally comprises a cylindrical housing assembly insertable within the tube to be inspected, and a probe carrier rotatably mounted within and helically movable with respect to the housing. The probe carrier holds three ultrasonic probes for transmitting ultrasonic beams which are directly oriented radially, chordally, an axially with respect to the longitudinal axis of the tube, as well as an eddy current probe for simultaneously inspecting the walls of the tube with electromagnetic lines of flux. The apparatus further includes a helical drive train formed from a lead screw assembly having a motor means, a drive shaft, and a drive sleeve for imparting a helical scanning motion to the probe carrier with respect to the housing.
    Type: Grant
    Filed: July 30, 1987
    Date of Patent: August 15, 1989
    Assignee: Westinghouse Electric Corp.
    Inventors: Michael J. Metala, William G. Clark, Jr., Warren R. Junker, Lee W. Burtner, Thomas E. Arzenti, Harold P. Johnson, Robert P. Vestovich, Bruce W. Bevilacqua
  • Patent number: 4834102
    Abstract: An endoscope, especially for transesophageal echocardiography. An encapsulated ultrasonic transducer capsule is provided having a self-contained electro-mechanical sector scanner. A sealed housing is formed which includes axially aligned tubular sections, one of magnetic material and the other of acoustically transparent plastic. A tubular shaft is journalled axially within the housing for limited sector scanning rotation. A magnetic rotor is fixed to the shaft for operation within the magnetic housing section and a transducer element is fixed to the shaft within the other tubular section. Conductor wires for activating the transducer are fixed at one end of the capsule and extend axially through the tubular shaft for connection to the transducer. Position sensing means are incorporated within the capsule. The construction enables the capsule to be highly miniaturized and greatly improved relative to known devices of this type.
    Type: Grant
    Filed: February 25, 1988
    Date of Patent: May 30, 1989
    Inventors: Jack Schwarzchild, Russel L. Uphoff, Christopher G. Miller
  • Patent number: 4828782
    Abstract: An arrangement for inspecting the fuel assemblies of boiled water reactors using an ultrasonic transducer probe. Each assembly contains a square array of fuel rods covered by a fuel channel slip. The probe accesses the fuel rods through a nosepiece in the shape of an inverted tripod located at the bottom of each assembly. The fuel rods are supported in each assembly by upper and lower tie plates, in the form of grids. The grids have first apertures for supporting the ends of the fuel rods, and second apertures which allow coolant water to flow between the fuel rods during operation. The probe is inserted through the second apertures of the lower tie plate grid, and rotated to inspect each of the four surrounding fuel rods for the presence of water inside the fuel rods.
    Type: Grant
    Filed: July 7, 1987
    Date of Patent: May 9, 1989
    Assignee: BBC Brown Boveri Nuclear Services
    Inventor: Thomas J. Donnelly
  • Patent number: 4817420
    Abstract: A method and device for the examination of a joint between a hollow steel shaft and a piece joined to the steel hollow shaft of a composite camshaft using ultrasonic examination. In the ultrasonic examination, the composite camshaft is put into a liquid and a probe of an ultrasonic search unit is inserted inside of the hollow steel shaft. The ultrasonic examination of the joint is performed from inside of the hollow steel shaft. According to the ultrasonic examination, any kind of joint of the composite camshaft is possible, because a distance from an inside surface of the hollow steel shaft to the joint is constant. In addition, since the probe does not contact the inside surface of the hollow steel shaft, the probe is not consumed due to abrasion.
    Type: Grant
    Filed: October 28, 1987
    Date of Patent: April 4, 1989
    Assignee: Nippon Piston-Ring Co., Ltd.
    Inventors: Takashi Kawaguchi, Yoshiaki Fujita, Satoshi Kawai
  • Patent number: 4772849
    Abstract: A probe (10) for longitudinally traversing and circumferentially inspecting the interior of a tube. A rotating sensor containing head (44) is driven by a rotor (40) extending from the end (38) of a cylindrical housing (12) in which it is mounted. The axially fixed rotor (40) surrounds and is driven by a helix drive connection (70) to a piston extension (32). The piston (20) reciprocates in a cylindrical chamber (14) within the housing (12) in response to selectively applied fluid pressure acting against a spring bias (60). A strain gage (62) on the spring (60) controls the fluid pressure by means of valve (2) whereby reciprocation of the piston (20) and its extension (32) rotates the rotor (40) by means of the helical groove (70) and balls (72). The various parts are hollow to accommodate the necessary wire conductors (51 and 64) and H.sub.2 O.
    Type: Grant
    Filed: September 11, 1986
    Date of Patent: September 20, 1988
    Assignee: Combustion Engineering, Inc.
    Inventor: Joseph A. Tedder
  • Patent number: 4769598
    Abstract: Apparatus for electromagnetically testing pipeline walls of steel or the like ferromagnetic material which is equipped, for example with a magnetizing coil for leakage-flux measurements, can be extended for ultrasonic measurement which is inductively excited and inductively measured with regard to the travel time as far as a reflecting surface and back, in the disposed in one or more of the pole regions there is a high-frequency current coil for the transmission and/or reception of steep-edged waves which are inductively coupled at the wall of the pipeline. The associated method starts from a stationary magnetic field in which high-frequency current pulses are produced in order to initiate vibrations in the pipe wall through induced currents. The travel time of these vibrations to a reflecting point and back can be measured in order to obtain an indication regarding the intact thickness of the pipe wall.
    Type: Grant
    Filed: March 14, 1986
    Date of Patent: September 6, 1988
    Assignee: Kopp AG International Pipeline Services
    Inventors: Gunther Krieg, Hartmut Goedecke
  • Patent number: 4757821
    Abstract: An omnidirectional ultrasonic probe, having specific application for connection to the distal end of an esophageal catheter, includes a support member upon which are coaxially mounted a transmitter member, a receiver member, and one or more acoustic reflector members. The acoustic reflector member or members reflect transmissions and receptions of ultrasonic signals along substantially parallel paths. The reflector members also provide omnidirectional reflection. Separate transmitter and receiver members are used in the preferred embodiments to facilitate continuous wave operation.
    Type: Grant
    Filed: November 12, 1986
    Date of Patent: July 19, 1988
    Assignee: Corazonix Corporation
    Inventor: Jonathan E. Snyder
  • Patent number: 4757716
    Abstract: An immersion based ultrasonic inspection system is disclosed which is used to interrogate the bore and near bore material of turbine and generator rotors by passing ultrasonic search units through the rotor bore. This system utilizes variable focus array inspection transducers in a shear mode inspection of the near bore material. A ranging transducer is provided which is used to correct the surface time of the inspection beam. A mapping transducer and blind bore sensor allow diameter mapping of the rotor bore as well as a blind rotor end sensing as the scan head carrying the transducers enters the bore. A scan head centering device or chuck deploys four radial arms to center and support the scan head. Each arm has a roller attached to the end which contacts the bore and rolls along so that the bore will not be damaged as the scan head passes through the bore.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: July 19, 1988
    Assignee: Westinghouse Electric Corp.
    Inventors: Lawrence D. Nottingham, Thomas E. Michaels, Jennifer E. Michaels
  • Patent number: 4752435
    Abstract: A scanning device, particularly for viewing above the core of a nuclear reactor, has links 29 pivoted together at 33 with means 35, 35a limiting relative movement in one sense. At least one link carries a transducer 36, preferably ultrasonic, for viewing. There may be two transducers arranged to view in different directions. The transducers may be mounted in a removable module.A deployment arrangement may have a vertical hollow mast 20 down which the links can be pushed to engage a deflect element 31 to reach an arm 23 from which the links can extend as a cantilever.
    Type: Grant
    Filed: May 7, 1985
    Date of Patent: June 21, 1988
    Assignee: National Nuclear Corporation Limited
    Inventors: Peter Fenemore, Keith A. Gamble, Frank M. Hancock
  • Patent number: 4711122
    Abstract: The present invention is an improved mud excluder fitted around a rotating acoustic transducer of a borehole televiewer to exclude mud from the borehole televiewer. This mud excluder has:(a) a flexible casing means attached to the borehole televiewer to form a fluid cavity adjacent to the rotating acoustic transducer,(b) an acoustically transparent fluid located within the fluid cavity,(c) an acoustic window means opposite the transducer and adjacent to the fluid cavity, and(d) a pressure compensating means within the fluid cavity to equalize the pressure within the fluid cavity with the pressure on the outside of the flexible casing means.
    Type: Grant
    Filed: August 21, 1986
    Date of Patent: December 8, 1987
    Assignee: Chevron Research Co.
    Inventors: Jorg A. Angehrn, Dennis J. Fischer
  • Patent number: 4699008
    Abstract: A shipping and storage enclosure for an ultrasonic inspection system used to inspect turbine and generator rotors from the bore which is flooded with water and which enclosure can be expanded into an operating enclosure in which the environment is controlled to provide for affective operation of the equipment and provide for alignment of the ultrasonic sensing head with the bore of the rotor shaft.
    Type: Grant
    Filed: March 26, 1986
    Date of Patent: October 13, 1987
    Assignee: Westinghouse Electric Corp.
    Inventors: Herbert E. Ferree, Lawrence D. Nottingham
  • Patent number: 4686078
    Abstract: A method, and an apparatus for carrying out the method, for displacing a weld scanner in and out of a horizontal reactor vessel nozzle submerged in a water pool characterized by buoyancy chambers into which water and air may be introduced by remote control to move the scanner and an associated telescopic boom, column and spider into position relative to the reactor vessel.
    Type: Grant
    Filed: April 8, 1985
    Date of Patent: August 11, 1987
    Assignee: Nuclear Energy Services, Inc.
    Inventor: Bernardus M. Zwart, Jr.
  • Patent number: 4663727
    Abstract: An ultrasonic inspection system for inspecting areas of tubular members and providing a display of any internal flaws therein. In order to operate in a confined work space a probe containing ultrasonic transducers is provided together with a rotational and axial drive scanner which is linked to a remotely controlled manipulator. The scanner uses a wand supporting the probe at the upper end thereof. The manipulator locates the probe and scanner in alignment with the tube to be inspected. A stepping motor on the scanner drives the wand and the probe axially to a location just above the area to be inspected. A second stepping motor rotates the wand to enable the probe to perform a circumferential scan. The axial stepping motor then indexes the wand towards the lower edge of the area and another circumferential scan occurs. The indexing and circumferential scanning proceeds until the entire area is scanned.
    Type: Grant
    Filed: April 19, 1984
    Date of Patent: May 5, 1987
    Assignee: Rochester Gas & Electric Corp.
    Inventors: Michael J. Saporito, Salvatore J. Deleo, Paul A. Lewis, Albert E. Curtis, III, Joseph D'Arienzo, David P. Roller, Jr.
  • Patent number: 4641529
    Abstract: A pipeline inspection apparatus is disclosed for the detection of corrosion pit type defects, employing one or more ultrasonic transducers to produce a parallel beam for direction toward the pipe wall from inside a pipe, with a sufficiently large beam width to permit comparison of time displayed signal components in defect depth determination, with the signal propagating through a gaseous medium. An additional embodiment combines the same with photographic apparatus.
    Type: Grant
    Filed: April 12, 1984
    Date of Patent: February 10, 1987
    Assignee: Magnaflux Pipeline Services, Inc.
    Inventors: Donald E. Lorenzi, Helmut F. Wagerer, Lev Spevak
  • Patent number: 4621532
    Abstract: A chain-like self-moving robot includes three or more capsule units connected to one another in a string by means of couplers. By expanding and contracting intercapsule spaces in a predetermined sequence so that a smaller number of the capsules are moved while a larger number of capsules remain stationary, the chain-like robot can move forwardly or backwardly.
    Type: Grant
    Filed: May 15, 1985
    Date of Patent: November 11, 1986
    Assignees: Hitachi, Ltd., Tokyo Gas Co., Ltd.
    Inventors: Atsushi Takagi, Shigeru Izumi, Fuminobu Takahashi, Chikara Sato, Shinji Naitoh, Shinji Sonoda
  • Patent number: 4619143
    Abstract: The non-destructive testing of solid bodies is conducted by generating a transverse, ultrasonic surface wave in the solid body being inspected, said surface waves having sufficient different frequencies such that they travel at different depths through the body being inspected; receiving at least a part of the reflected portion, if any, of the surface waves, the reflected portion consisting of at least two surface waves having sufficiently different frequencies such that these waves travelled at distinctly different depths through the solid body and filtering and measuring or analyzing the reflected portion of the surface waves to determine if a defect or discontinuity exists in the solid body and the depth or severity of the defect or discontinuity.
    Type: Grant
    Filed: August 24, 1984
    Date of Patent: October 28, 1986
    Assignee: Dow Chemical (Nederl) B.V.
    Inventor: Ferdinand M. J. Franken
  • Patent number: 4612808
    Abstract: An ultrasonic probe for inspecting a weld between a cylinder (C) and a pipe (P) is caused to move in a holder at the end of an arm (11) pivoted at a point on the axis (Z) of the pipe so that the line (12) of transmission from probe penetrates the weld and, when projected beyond the weld, intersects the axis (Z) of the pipe (P) for all positions of the arm.
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: September 23, 1986
    Assignee: United Kingdom Atomic Energy Authority
    Inventors: Bruce J. McKirdy, Ashley G. Cooper
  • Patent number: 4597294
    Abstract: An apparatus is disclosed for inspection of tubing, and more particularly, the determination of the extent of erosion in the wall of a heat exchange tube of a nuclear reactor. An ultrasonic transducer assembly is movable axially and rotatably in a helical path for producing both thickness and position signals to provide a map of wall thickness.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: July 1, 1986
    Assignee: Westinghouse Electric Corp.
    Inventors: Bernard A. Brill, III, Warren R. Junker, John K. White, Iftikhar A. Rana, Bruce W. Bevilacqua, Frank W. Cooper, Jr., Bruce J. Taszarek
  • Patent number: 4593568
    Abstract: To monitor the deterioration of a weld (10) between a tube (11) and tube plate (12) which has been repaired by a repair sleeve (14) inside the tube and brazed at one end to the tube, ultrasound from a crystal (21) at the end of a rod (24) is launched into the tube through the braze (15) and allowed to travel along the tube to the weld and be reflected back along the tube. The technique may also be used for the type of heat exchanger in which, during construction, the tubes are welded to the tube plate via external sleeves in which case the ultrasound is used in a similar manner to inspect the sleeve/tube plate weld.
    Type: Grant
    Filed: January 14, 1985
    Date of Patent: June 10, 1986
    Assignee: United Kingdom Atomic Energy Authority
    Inventors: David W. Telford, Thomas S. Peat
  • Patent number: 4586380
    Abstract: A transducer assembly for maintaining a transducer in contact with, and in alignment with, a surface includes a pair of opposed swivel bars, each of which is pivotably mounted to a cradle. The swivel bars are free to pivot about a roll axis. Two tension arms are pivotably mounted to one of the swivel bars. Each tension arm resiliently urges an end of the transducer into contact with the surface. One of the swivel bars supports two spaced-apart wheels whose contact with the surface is effective to rotate its swivel bar into a predetermined rotation about the roll axis. The transducer, being attached to the swivel bar by one of the tension arms is also rotated into a predetermined angle about the roll axis.
    Type: Grant
    Filed: January 17, 1985
    Date of Patent: May 6, 1986
    Assignee: General Electric Company
    Inventor: Robert W. Patterson
  • Patent number: 4581938
    Abstract: A tool (100) for scanning the inner surface (110) of a pipe (106), comprising a scanning section (112) interacting with a centering section (114). The scanning section includes an axle member (128) having strut members (130) rigidly connected thereto and projecting diametrically outwardly for urging inspection probe sleds (126) against the pipe surface. The centering section (114) includes a slide cylinder (124) coaxially disposed about the axle member (128), and having rigidly connected actuating members (120) projecting diametrically outward for contacting the pipe inner wall with sufficient force to center and support the tool within the pipe. Locking means (146) are provided within the actuating member (120) for selectively engaging the axle member (128) to lock the longitudinal position of the strut member (130) relative to the actuating member (120).
    Type: Grant
    Filed: July 30, 1984
    Date of Patent: April 15, 1986
    Assignee: Combustion Engineering, Inc.
    Inventor: Timothy H. Wentzell
  • Patent number: 4576048
    Abstract: The disclosure is directed to a method and apparatus for non-destructive inspection of a solid workpiece, such as a steel workpiece. In accordance with the method of the invention, ultrasound is generated at an annular ring or portion thereof and focused into a hollow substantially cone-shaped beam, or sector thereof. The beam is directed at the surface of the workpiece so as to establish shear mode ultrasound energy in the workpiece. Ultrasound energy is then received from the workpiece (e.g. by reflection or transmission) and characteristics of the internal structure of the workpiece can be determined from the received ultrasound energy. In the preferred embodiment of the invention, the beam is configured such that the ultrasound energy impinging on the surface of the workpiece is at a sufficiently large angle with respect to the normal to the surface such that primarily shear mode of ultrasonic energy will be established within the workpiece.
    Type: Grant
    Filed: June 19, 1984
    Date of Patent: March 18, 1986
    Assignee: New York Institute of Technology
    Inventor: William E. Glenn
  • Patent number: 4572201
    Abstract: A probe which is inserted into a lumen to obtain an ultrasonic tomogram using mechanical scanning is disclosed. A cylindrical acoustic case is filled with a liquid medium which transmits sound waves, and an elliptical ultrasonic transducer is immersed therein in such a manner that it can be rotated by a motor. The diameter of the transducer parallel to its axis of rotation is greater than that perpendicular to the axis of rotation, so that the lateral resolution parallel to the axis of rotation is improved, as well as the sensitivity.
    Type: Grant
    Filed: October 11, 1984
    Date of Patent: February 25, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Shinichi Kondo, Chitose Nakaya, Shizuo Ishikawa
  • Patent number: 4569230
    Abstract: A vehicle able to move between two walls and particularly in the space between two vessels of a fast neutron reactor, for inspection and testing; the vehicle having two wheels bearing on one of the two walls and connected to the vehicle body by two longitudinal arms and two wheels bearing on the other wall and arranged symmetrically with respect to the previously mentioned wheels and connected to the vehicle body by two transverse arms. The longitudinal and transverse arms may be folded back to permit the passage of the assembly through an opening.
    Type: Grant
    Filed: July 11, 1983
    Date of Patent: February 11, 1986
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Michel Asty, Bernard Lerat, Robert Saglio, Jacky Viard
  • Patent number: 4560931
    Abstract: A mobile truck 10 furnished with power source and travel drive mechanism is set in a cargo oil pipe 48 to run inside to inspect and monitor the state of the inner surface of a pipe wall by means of its built-in magnetic flaw-detecting instrument 12 and video camera 14, so that the image signals taken by the video camera 14 may be reproduced and inspected on a television receiver 30 in the monitoring stations located aboard the vessel while the inspection data signals from the magnetic flaw-detecting instrument 12 may be recorded in a recorder 20 at the same time.
    Type: Grant
    Filed: July 29, 1982
    Date of Patent: December 24, 1985
    Assignee: Kubota, Ltd.
    Inventors: Shinichi Murakami, Takao Mihara
  • Patent number: 4559825
    Abstract: A system of transducers and electrical circuitry connecting with the transducers detects and locates flaws in the metallic walls of vessels used for containing and transporting liquids. An array of transducers is carried by a sled having rollers for facile movement about the surface of the vessel which surface is submerged within the liquid to permit the liquid to provide a sound propagating medium between the transducers and the vessel wall. The transducers are arranged in sets of two transducers, one of which is a transmitting transducer and the other a receiving transducer, the two transducers being positioned in tandem for increased azimuthal coverage of the sonic radiation.
    Type: Grant
    Filed: February 15, 1984
    Date of Patent: December 24, 1985
    Assignee: Automation Industries, Inc.
    Inventor: George D. Martens
  • Patent number: 4523470
    Abstract: Probe for the nondestructive testing of cylindrical cavities, including a rotatable testing head, an outwardly cylindrical housing supporting the testing head, a motor disposed in the housing for driving the testing head, a shell body being surrounded by the housing and being in the form of a semi-cylindrical part with a relatively smaller diameter in vicinity of the motor, a tube sealing the shell body in vicinity of the motor, and means disposed on the shell body for securing the motor in a definite position.
    Type: Grant
    Filed: January 28, 1983
    Date of Patent: June 18, 1985
    Assignee: Kraftwerk Union Aktiengesellschaft
    Inventors: Thomas Muller, Gunter Lehner, Georg Gugel
  • Patent number: 4520673
    Abstract: Inspection device, including a probe having a thrust hose for moving the probe, the thrust hose having mutually equidistant holes formed therein along a generatrix line thereof, a feed device having drive wheels for engaging the thrust hose to move the probe, and plugs disposed on at least one of the drive wheels for insertion in the holes.
    Type: Grant
    Filed: January 28, 1983
    Date of Patent: June 4, 1985
    Assignee: Kraftwerk Union Aktiengesellschaft
    Inventors: Thomas Muller, Rainer Bauer
  • Patent number: 4506549
    Abstract: The invention relates to a device for the automatic checking of welds between tubular parts. A carriage comprises two fixed ends with their centering wheels, a movable mechanism with two flanges and guide rails. This mechanism rotates on bearings. The carriage includes a drum moving over rails and bearing a telescopic arm orientable by rotation on its axis. The end of the arm carries an inspection head. Digital control ensures the programming of the movement and the orientation of the inspection head opposite the weld. The device and method are useful for the ultrasonic checking of the welds of the nodes of offshore platforms and for the checking of welds in nuclear power systems.
    Type: Grant
    Filed: December 3, 1981
    Date of Patent: March 26, 1985
    Inventor: Paul Thome
  • Patent number: 4502330
    Abstract: A system for improving the pulse-echo type of testing to determine certain parameters of tubes, such as internal diameter, external diameter, wall thickness, etc. A pair of pulses are directed transversely to the tube wall so that the transit times of the respective pulses and their reflections from a tube surface, are substantially different. From the value of the transit times associated with each pulse pair the respective parameter is derived. Inaccuracies due to undesired oscillations of the driving shaft for rotating the pulse transducer within the tube to be tested are eliminated. By means of auxiliary reflective surfaces each pair of pulses emitted from the transducer are directed transversely relative to the respective tube wall in substantially one and the same plane.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: March 5, 1985
    Assignee: B.V. Neratoom
    Inventor: Wilhelmus M. J. Haesen
  • Patent number: 4463378
    Abstract: A display system for use with a well logging tool of the type that scans a borehole wall by rotating an acoustical transducer while emitting and receiving acoustic energy. The received acoustic or information signals are received and recorded for later use. In addition, both the amplitude and time-of-flight of the information signals are digitized and passed to a computer that controls a television display and cathode ray tube. The amplitude is displayed on the television screen while the time-of-flight is displayed on the cathode ray tube as a caliper log.
    Type: Grant
    Filed: July 27, 1982
    Date of Patent: July 31, 1984
    Assignee: Shell Oil Company
    Inventor: Frederick H. K. Rambow
  • Patent number: 4460920
    Abstract: Automatically traveling tube-interior manipulator for the remotely controlled transportation of testing devices and tools along given feedpaths through the tube interior, including a stepping mechanism having at least two links including a rear stepping body and a front counterstepping body as seen in the direction of entry into the tube, at least one gimbal-type joint hinging the bodies to each other, clamping devices disposed on each of the bodies for clamping the bodies to the inner periphery of the tube, driving means associated with at least one of the bodies for transporting the stepping body in the axial direction of the tube relative to the counterstepping body when the clamping device of the stepping body is engaged and the clamping device of the counterstepping body is disengaged and vice versa, guiding elements disposed on the outer periphery of each of the bodies for transportation along the inner periphery of the tube, a line reservoir disposed outside the tube, a flexible harness of supply lines
    Type: Grant
    Filed: October 30, 1981
    Date of Patent: July 17, 1984
    Assignee: Kraftwerk Union Aktiengesellschaft
    Inventors: Robert Weber, Alois Koppl, Siegfried Forner, Erich Kohlert, Otto Muller
  • Patent number: 4453410
    Abstract: An ultrasonic probe is positioned within a hollow body such as a pipe for detecting possible flaws in the body wall. The probe is designed for rotational and longitudinal movement in said pipe and includes an ultrasonic transmitter/receiver mounted eccentrically within a liquid filled chamber of the probe, so that transmitted impulses strike the inner wall of the pipe at such an angle that the angle of refraction of the sound wave in the material of the wall is always less than 90.degree..
    Type: Grant
    Filed: June 14, 1983
    Date of Patent: June 12, 1984
    Assignee: Ruhrchemie Aktiengesellschaft
    Inventors: Hans-Peter Schmitz, Bernard Schleper
  • Patent number: 4441369
    Abstract: An extended flaw in a material is located in two or three dimensions by propagating ultrasonic energy in a predetermined direction in the material and logging receiving transducer positions and ranges at which individual facets on the surface of the flaw produce maximum amplitude ultrasonic returns. The positions of all of the individual facets in the material are calculated from the predetermined direction, receiving transducer positions and the corresponding ranges. The locations of the individual facets outline the extended flaw.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: April 10, 1984
    Assignee: General Electric Company
    Inventors: Dennis E. Lessard, Paul F. Sabourin
  • Patent number: 4412315
    Abstract: An apparatus and method for making wall thickness measurements. It is particularly applicable to pipeline use. It uses a pulse-echo acoustic arrangement with a single piezoelectric transducer sending and receiving acoustic signals from both faces. It has a pair of reflectors, one for each face of the transducer so that acoustic energy is directed both normal to the wall and at an angle in order to simultaneously measure the wall thickness and find any anomaly such as pitting or the like. For pipeline use there may be a plurality of instruments situated around the periphery of a unit to scan the walls as it travels through the pipeline.
    Type: Grant
    Filed: July 27, 1981
    Date of Patent: October 25, 1983
    Assignee: Texaco Inc.
    Inventor: Norman E. Flournoy
  • Patent number: 4391143
    Abstract: An ultrasonic probe for inspecting the interface between the walls of a double-wall tube comprises a cylindrical body member having two cavities axially spaced apart thereon. The probe is placed in the tube and ultrasonic energy is transmitted from a transducer in its body member to a reflector in one of its cavities and thence into the inner wall of the tube. A second transducer in the probe body member communicates with the second cavity through a collimation passage in the body member, and the amount of ultrasonic energy reflected from the interface between the walls of the tube to a second reflector through the collimation passage to the second transducer depends upon the characteristics of said interface.
    Type: Grant
    Filed: May 29, 1981
    Date of Patent: July 5, 1983
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Kenneth V. Cook, Robert A. Cunningham, Jr., Horace T. Murrin
  • Patent number: 4388831
    Abstract: A probe is disclosed for the nondestructive inspection of the interior walls of cylindrical recesses, comprising an elongated shaft having an ultrasonic transducer mounted thereon a predetermined distance from the longitudinal axis of the shaft and oriented for directing the axis of radiation of ultrasonic energy emanating from the transducer outwardly in a plane perpendicular to the longitudinal axis of the shaft. In another embodiment, the probe comprises a shaft having a lateral extension whereon a first ultrasonic transducer is mounted at a predetermined distance from the longitudinal axis of the shaft and is oriented for directing the axis of radiation of ultrasonic energy emanating therefrom parallel to a line formed by the intersection of planes perpendicular to the longitudinal axes of the shaft and lateral extension.
    Type: Grant
    Filed: February 20, 1981
    Date of Patent: June 21, 1983
    Assignee: General Electric Company
    Inventor: Ira N. Sherman
  • Patent number: 4382383
    Abstract: An inspection device for use in scanning the interior of a pipe at a remote location is accurately centered within the pipe at the required location by two spiders. Each spider has three sickle-shaped arms which can be extended and retracted between operative and inoperative positions. The six spider arms are interconnected by a crank mechanism which ensures that all the arms move in unison between their limit positions.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: May 10, 1983
    Inventors: Eric G. de Buda, Anthony L. Allen
  • Patent number: 4372161
    Abstract: A pneumatically operated pipe crawler for transporting inspection equipment along the interior of a pipe comprises an elongate cylindrical tube of flexible resilient material, such as latex rubber, the tube being partitioned by longitudinally spaced plugs which are hermetically sealed to the wall of the tube thus defining three longitudinally separated chambers. The inspection equipment is mounted at the leading end of the crawler. To advance the crawler along the pipe, air or other gas is supplied to the chambers and exhausted therefrom in repeated cyclic sequence for sequentially expanding the chamber wall portions into clamping relation with the pipe, each wall portion recovering to its axial length upon deflation of the chamber, thereby to propel the tube step by step along the pipe.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: February 8, 1983
    Inventors: Eric G. de Buda, John R. Boon, Michael P. Dolbey
  • Patent number: 4368642
    Abstract: An ultrasonic transducer probe for testing workpieces exhibiting compound surfaces includes a molded plastic body which precisely fits to the shape of such workpiece surfaces. Moreover, the body includes, as an integral part thereof, an indexing portion for accurately locating the transducer probe in relation to a predetermined workpiece test area to cause the transducer element embedded in the molded body to transmit ultrasonic energy in the predetermined test area. The transducer probe is secured to a manipulator for remote operation.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: January 18, 1983
    Assignee: Krautkramer-Branson, Inc.
    Inventor: Thomas J. Carodiskey
  • Patent number: 4368644
    Abstract: A tool for manipulating an ultrasonic inspection transducer is actuated to move the transducer over the surface of an irregular weld body. The weld body disclosed, joins the nozzle of a reactor vessel to its vessel, the irregularity of the weld body defined by the intersection of the two cylinders. The transducer is moved over the surface of the weld body and actuated to scan through a predetermined angle in relation to the changing aspect of the geometry of the weld body by a cam mounted at the pivoting center of the tool.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: January 18, 1983
    Assignee: Combustion Engineering, Inc.
    Inventors: Timothy H. Wentzell, Charles B. Innes, Jr.
  • Patent number: 4361044
    Abstract: The invention is an ultrasonic testing device for rapid and complete examination of the test specimen, and is particularly well suited for evaluation of tubular test geometries. A variety of defect categories may be detected and analyzed at one time and their positions accurately located in a single pass down the test specimen.
    Type: Grant
    Filed: December 9, 1980
    Date of Patent: November 30, 1982
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: David S. Kupperman, Karl J. Reimann
  • Patent number: 4359905
    Abstract: An ultrasonic transducer device is provided which is used in ultrasonic inspection of the material surrounding a threaded hole and which comprises a wedge of plastic or the like including a curved threaded surface adapted to be screwed into the threaded hole and a generally planar surface on which a conventional ultrasonic transducer is mounted. The plastic wedge can be rotated within the threaded hole to inspect for flaws in the material surrounding the threaded hole.
    Type: Grant
    Filed: December 1, 1980
    Date of Patent: November 23, 1982
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Donald A. Gavin
  • Patent number: 4353257
    Abstract: The present invention relates to a system for the nondestructive testing of the thickness of boiler tubes. The system comprises a probe assembly which includes a mounting unit for mounting the assembly in a mud or water drum of a boiler at the location of a boiler tube to be tested. The probe assembly is comprised of an ultrasonic transducer for transmitting and receiving ultrasonic signals. The probe assembly further includes a motor drive connected to the transducer. A control unit is provided which includes a motor control portion connected to the motor drive to selectively position the transducer at a plurality of locations in the boiler tube to be tested. The control unit also includes an ultrasonic drive for producing an ultrasonic pulse for driving said transducer means. A water control is connected to the control unit, a source of water supply, a drain, and the probe assembly.
    Type: Grant
    Filed: January 6, 1981
    Date of Patent: October 12, 1982
    Assignee: Her Majesty the Queen in right of Canada as represented by the Minister of National Defence
    Inventors: Jiri Vrba, Alistair A. Fife, Max B. Burbank, Vaclav Macura, Randy K. Lomnes
  • Patent number: 4306459
    Abstract: A carrier for a plurality of transducers is disclosed. The carrier is useful in ultrasonic testing of furnace tubes. The carrier includes provision for positioning a plurality of transducers against the interior of the tubes.
    Type: Grant
    Filed: February 15, 1980
    Date of Patent: December 22, 1981
    Assignee: Conoco Inc.
    Inventors: Albert S. Johnson, Bruce W. Pappan
  • Patent number: 4285242
    Abstract: A pipe inspection apparatus includes a vehicle which is capable of moving along the bore of the pipe, two rubber cup-shaped members at each end of the vehicle for aligning the vehicle lengthwise in the pipe, a floating assembly of inspection devices such as ultrasonic transducers disposed circumferentially around the vehicle, and at least four link members pivotally attached to the assembly and to the vehicle to constrain the assembly to move in a direction normal to the length of the vehicle. The assembly may be resiliently suspended from the vehicle, and may also be provided with a centralizing device, such as a rubber cup-shaped member or rollers or skids, to centralize the assembly in the bore of the pipe.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: August 25, 1981
    Assignee: British Gas Corporation
    Inventor: Geoffrey C. Braithwaite
  • Patent number: 4285243
    Abstract: A pipe inspection device for ultrasonically inspecting the wall of a pipe includes a support arm which is pivotally attached at one end to an inspection vehicle and at its other end pivotally supports a spindle at the end of which two wheels are rotatably mounted. One or more ultrasonic transducers are disposed inside each wheel so that when the vehicle is moved along the pipe, the wheels come into contact with the pipe such that the transducers are aligned in predetermined positions relative to the pipe. The device may be arranged for insertion in the bore of the pipe, or for assembly around the outside of the pipe.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: August 25, 1981
    Assignee: British Gas Corporation
    Inventor: John C. Collingwood