Around Cylindrical Object Patents (Class 73/637)
  • Patent number: 10533976
    Abstract: An ultrasonic matrix phased array inspection system can include a plurality of curved matrix phased array probes surrounding a test chamber through which a longitudinal test object passes. Fluid injectors can provide a rotating fluid jacket around the longitudinal test object to ultrasonically couple the plurality of curved matrix phased array probes to the longitudinal test object. The plurality of curved matrix phased array probes can remain in a fixed position during inspection and can inspect the longitudinal test object by transmitting ultrasonic sound waves at various angles to identify flaws of any orientation.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: January 14, 2020
    Assignee: General Electric Company
    Inventors: Stephan Schmitz, Stephan Falter, Wolfgang Dick, Thomas Weise, Matthias Schwabe
  • Patent number: 10465835
    Abstract: A robotic apparatus comprising first, second, and third wheel assemblies, and a clamping mechanism configured to apply a force for urging the second wheel and the third wheel to pivot in opposing directions towards a plane of the first wheel for securing the first wheel, the second wheel, and the third wheel to the pipe, each wheel assembly including an alignment mechanism for adjusting an orientation of the wheels to allow the robotic apparatus to move along a straight path or a helical path on the pipe. A method for navigating an obstacle on a pipe comprising advancing the robotic apparatus along a helical pathway on the pipe to position an open side of the robotic apparatus in longitudinal alignment with the obstacle, and advancing the robotic apparatus along a straight pathway on the pipe such that the obstacle passes unobstructed through the open side of the robotic apparatus.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: November 5, 2019
    Assignee: Arix Technologies, Inc.
    Inventors: Karl Petter Wehlin, Bryan R. Duerfeldt, Dianna D. Liu, Gary E. van Deursen, Timothy D. Foldy-Porto
  • Patent number: 10400525
    Abstract: A rod positioning device for aligning a drilling rod with a rod string having complementary mating threads, comprising a base, an arm mounted to the base about a first rotation axis, and a rod-gripping device mounted on the arm. The arm is for displacement about the first rotation axis between a rod loading position and a rod alignment position. The rod-gripping device is for operating between a rod-gripping configuration and a rod-releasing configuration. The rod-gripping device comprises jaws for gripping the drilling rod while the rod-gripping device is in the rod-gripping configuration and the arm is in the rod loading position, and guiding elements mounted on the jaws, the guiding elements aligning the drilling rod with the rod string and enabling longitudinal displacement of the drilling rod to contact the rod string.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: September 3, 2019
    Inventor: Daniel Roy
  • Patent number: 10107659
    Abstract: A sensor-clamp device for clamping a pipe of different outer-diameters promptly without having to do a time-consuming sensor-position adjustment includes a pair of ultrasonic-sensors incorporating an ultrasonic-transducer for sending and receiving ultrasonic-waves ‘So’ and further includes a supporting-plate on which is provided a sliding-mechanism. The pair of ultrasonic-sensors clamps the outer-wall of the pipe in which flows a fluid W1. Of the supporting-plate, the pair of ultrasonic-sensors used in irradiating the ultrasonic-waves ‘So’ obliquely to the pipe are offset in the axial-line direction of the pipe and firmly placed face to face. The sliding-mechanism slides one of the pair of ultrasonic-sensors obliquely with respect to the axial-line direction of the pipe, thus making the sliding-mechanism to clamp the pipe of various outer-diameters.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: October 23, 2018
    Inventors: Kenji Nagareda, Yuki Murai, Kiyoshi Natsume, Yuichi Maida
  • Patent number: 9823103
    Abstract: A flow meter includes a meter body including a passageway therethrough and an outer surface having a curved portion, a transducer assembly coupled to said meter body, a shroud on said outer surface of said meter body and covering said transducer, said shroud including a pair of shell portions, each shell portion including a pair of ends and a pair of edges, a fastener disposed between one end of each of said shell portions and configured to draw said shell portions toward one another, and a wireway defined by said outer surface of said meter body and said shell portions.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: November 21, 2017
    Assignee: Daniel Measurement and Control, Inc.
    Inventors: Padmanabh Jagadish Joshi, Gokulkrishna Seetaramaiah Goli, Randeep Singh Grewal, Charles Robert Allen
  • Patent number: 9146215
    Abstract: An apparatus and method for inspection of tubes in a boiler is disclosed. The apparatus includes a sensor adapted to generate and detect guided-waves and a mechanical device adapted to reach into a tube bundle and clamp the sensor onto an interior tube selected for inspection. The mechanical device includes a housing adapted to contain the sensor and an air cylinder adapted to actuate the housing to allow the housing to clamp onto the interior tube.
    Type: Grant
    Filed: September 18, 2012
    Date of Patent: September 29, 2015
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Hegeon Kwun, Matthew Capps, James Crane, Stanley M. Walker
  • Patent number: 9101331
    Abstract: The present invention employs an object information acquiring apparatus that receives an acoustic wave generated from an object, on which light is irradiated, and generates property information. The apparatus includes a housing including an aperture into which, when the acoustic wave is received, the object, which is a part of an examinee, is inserted and, when performance evaluation for the apparatus is performed, a calibration device corresponding to a type of the performance evaluation is inserted, the housing being capable of holding the examinee; a holding unit configured to hold the object; a positioning unit configured to specify an attachment position of the calibration device correspondingly to a position specifying member of the calibration device; and a detecting unit configured to detect the type of the performance evaluation performed using the inserted calibration device.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: August 11, 2015
    Inventor: Yohei Motoki
  • Patent number: 8485036
    Abstract: Inspection of circumferential sections of pipe or other conduit using an ultrasonic scanning apparatus is provided, wherein axial drift of the ultrasonic scanning apparatus is prevented using a guide track assembly. The guide track assembly is rigidly coupled to the ultrasonic scanning apparatus in the axial direction, but allows rotational motion of the ultrasonic scanning apparatus directly along the outer surface of the conduit using a drive chain that is driven by a circumferential drive. Secure rotational motion without drift between the guide track assembly and the ultrasonic scanning apparatus is maintained by the rigid coupling and by a spring-loaded wheel housing assembly that maintains contact of wheels that travel along the guide track. The ultrasonic scanning apparatus includes a transducer with spring-loaded gimbaling that maintains optimal proximity with the conduit surface. The transducer is translated axially along linear journals that extend along the conduit with a linear actuator.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: July 16, 2013
    Assignee: GE-Hitachi Nuclear Energy Americas LLC
    Inventors: Thomas H. Crumpton, Edmund S. Mercier
  • Publication number: 20120325005
    Abstract: A method and apparatus for collecting ultrasonic test data from a railway wheel with an ultrasonic testing apparatus is described. The railway wheel is supported by two drive rollers, each having an indentation which engages with and rotates the wheel. An indexing transducer moves across the rotating wheel, collecting ultrasonic test data while a fixed transducer correlates a reference position on the wheel to the collected test data. To maintain the accuracy of the reference position to the collected test data, it is desirable to maintain the rotational stability of the wheel, minimizing any dynamic instability caused by dimensional tolerances in the wheel. To mitigate instabilities resulting from dimensional tolerances, the indentation of the drive rollers, which engage and drive the flange of the wheel, are variably spaced using a resilient member to maintain frictional contact between the wheel and the drive roller.
    Type: Application
    Filed: June 23, 2011
    Publication date: December 27, 2012
    Applicant: AMSTED Rail Company, Inc.
    Inventors: John R. Oliver, John D. Oliver
  • Patent number: 8061208
    Abstract: A non-destructive examination pipe scanner that employs a main carriage on which a sensor is mounted, a tensioner carriage and an idler carriage. The main carriage and the tensioner carriage are positioned around the pipe at spaced locations and connected on either side by a spring band. The idler carriage is slidably supported by the spring band in between the main carriage and the tensioner carriage. The sensor on the main carriage collects data about a circumferential weld on the pipe as the main carriage drives the tensioner carriage and the idler carriage around the circumference. The tensioner carriage has a variable length connection that adjusts the tension on the spring band to urge the main carriage, idler carriage and tensioner carriage into contact with the surface of the pipe.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: November 22, 2011
    Assignee: Westinghouse Electric Company LLC
    Inventors: Douglas J. Roberts, George R. Rowland
  • Patent number: 7954380
    Abstract: A method for conducting nondestructive internal inspection of a rotary drill bit used for drilling subterranean formations comprises communicating ultrasonic waves into a drill bit and detecting ultrasonic waves that are reflected by at least a portion of the drill bit. In some embodiments, the waves may be directed into the drill bit from within a longitudinal bore thereof. Reflected waves also may be detected from within the bore. The methods may be used to develop threshold acceptance criteria for classifying drill bits as acceptable or unacceptable to prevent catastrophic failures of drill bits during use. Systems and apparatuses are disclosed for conducting nondestructive ultrasonic inspection of a drill bit used for drilling subterranean formations. The systems and apparatuses may comprise an ultrasonic probe configured for insertion within an internal longitudinal bore of a drill bit. Drill bits are disclosed that are configured to facilitate nondestructive ultrasonic inspection thereof.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: June 7, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Jeffrey B. Lund, Nicholas J. Lyons, Eric C. Sullivan, Terry D. Watts
  • Publication number: 20110000302
    Abstract: A method for ultrasonic inspecting a substantially circular circumferential weld which connects an inner pipe and an outer pipe which are aligned coaxial relative to each other, the method comprising the steps of: a) positioning at least one ultrasonic probe inside the inner pipe; b) moving the at least one probe in tangential direction relative to the inner pipe a while emitting at least one ultrasonic beam towards the weld and receiving ultrasonic signals by means of the at least one probe.
    Type: Application
    Filed: July 1, 2009
    Publication date: January 6, 2011
    Inventors: Xavier Georges Jose Deleye, Frederik Hendrik Dijkstra, Khalid Chougrani, Adrianus Maria Cornelius Van Den Biggelaar, Hubertus Rundberg
  • Publication number: 20100275694
    Abstract: A pipe scanner for non-destructively scanning an extended length of the circumference of a pipe along an axial dimension. The pipe scanner includes a collar sized to fit around the outer circumference of the pipe. Wheels supported on the collar ride on the surface of the pipe while maintaining a space between the inner surface of the collar and the outer surface of the pipe. A track extends circumferentially around the collar for guiding a circumferential drive unit that rides on the track and carries a non-destructive sensor for monitoring the surface of the pipe as the circumferential drive unit moves around the track. An axial drive unit is connected to the collar, having a plurality of circumferentially spaced drive wheels in contact with the pipe for moving the collar along the extended length.
    Type: Application
    Filed: May 4, 2009
    Publication date: November 4, 2010
    Applicant: Westinghouse Electric Company, LLC
    Inventor: DOUGLAS J. ROBERTS
  • Patent number: 7631560
    Abstract: A method for conducting nondestructive internal inspection of a rotary drill bit used for drilling subterranean formations comprises communicating ultrasonic waves into a drill bit and detecting ultrasonic waves that are reflected by at least a portion of the drill bit. In some embodiments, the waves may be directed into the drill bit from within a longitudinal bore thereof. Reflected waves also may be detected from within the bore. The methods may be used to develop threshold acceptance criteria for classifying drill bits as acceptable or unacceptable to prevent catastrophic failures of drill bits during use. Systems and apparatuses are disclosed for conducting nondestructive ultrasonic inspection of a drill bit used for drilling subterranean formations. The systems and apparatuses may comprise an ultrasonic probe configured for insertion within an internal longitudinal bore of a drill bit. Drill bits are disclosed that are configured to facilitate nondestructive ultrasonic inspection thereof.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: December 15, 2009
    Assignee: Baker Hughes Incorporated
    Inventors: Jeffrey B. Lund, Nicholas J. Lyons, Eric C. Sullivan, Terry D. Watts
  • Patent number: 7516664
    Abstract: In a method for the ultrasonic testing of a workpiece (2) in a curved area of its surface, in particular of a workpiece (2) made of a fiber composite material, an ultrasonic test head (10) is acoustically coupled to the workpiece in this area, and includes an ultrasonic transducer arrangement (12) comprising a plurality (N) of individually driveable transducer elements (20i) which are arranged next to one another. In chronologically successive test cycles, a number (n) of transducer elements (20i) are respectively combined to form a group and are driven in a plurality of test pulses within this test cycle in a time delayed manner with respect to one another such that the transmitted ultrasound beam (30a-d) in this test cycle is swept within a predetermined angular range (?1, ?2), so that one of the number of echo signals, corresponding to the number of test pulses, for each group is received from different directions of the workpiece (2).
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: April 14, 2009
    Assignee: Intelligendt Systems & Services GmbH & Co. KG
    Inventors: Rainer Meier, Jana Becker, Thomas Rehfeldt
  • Publication number: 20090038398
    Abstract: A motorized bracelet assembly for ultrasonic crack detection in a pipe. The bracelet has a motorized frame adapted for installation around the pipe and a sliding arrangement slideably mounted onto the frame. The sliding arrangement guides a displacement of sensor modules in periphery of the pipe. A first driving device controllably drives the sliding arrangement and thereby displacing the sensor modules in periphery of the pipe at desired operating positions. The bracelet comprises biasing devices for biasing the sensor modules against the pipe and a second driving device for controllably driving the frame along the axial direction of the pipe at a desired operating position.
    Type: Application
    Filed: November 12, 2004
    Publication date: February 12, 2009
    Applicant: Hydro-Quebec
    Inventors: Eric Lavoie, Gilles Rousseau
  • Patent number: 6561024
    Abstract: A method and apparatus for creating a finite clearance space between two parts under blind assembly conditions involves threading an elongated sensor into a housing containing the part to be sensed by first placing a spacer element on an operative surface of the sensor wherein the spacer element has a radial thickness equal to the finite clearance space. The sensor is screwed unto the housing in a radial direction towards the operative surface of the sensor until the spacer element engages the operative surface, thereby specifically locating the operative surface a precise radial distance from the operative surface.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: May 13, 2003
    Assignee: Sauer-Danfoss, Inc.
    Inventor: Aaron Bell
  • Patent number: 6536283
    Abstract: Automated inspection assemblies for scanning pipes of a nuclear reactor are described. In one embodiment, the assembly includes a mounting subassembly and a scanning subassembly. The mounting subassembly includes a clamp configured to be mounted to selected pipes in a nuclear reactor pressure vessel, and the scanning subassembly is movably coupled to the mounting subassembly. The scanning assembly includes a scanning head configured to scan at least a portion of the circumference of the pipe to be inspected, and the scanning head includes a substantially “U” shaped transducer support assembly sized to receive the pipe. Transducer elements are coupled to the transducer support assembly legs, and the transducer support assembly is configured to rotate about the pipe to inspect the pipe.
    Type: Grant
    Filed: August 18, 1999
    Date of Patent: March 25, 2003
    Assignee: General Electric Company
    Inventor: Kenneth J. Hatley
  • Patent number: 6523418
    Abstract: The latent stress in both flat and curved materials can be measured using critically refracted longitudinal ultrasonic technique. The system uses a frame to hold a hydraulic piston. The piston is used to apply an adjustable force against the probes. A signal is initiated by a transmitting probe. The signal is angled against the piece under test so as to create a critically refracted wave along the piece. Wedge-shaped probe pads allow placement of the probes on both flat and curved surfaces with various radii and arc lengths. The delay time to receive the wave at a first and second receiving probe is measured. The delay time correlates to a stress in the piece.
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: February 25, 2003
    Inventor: Don E. Bray
  • Patent number: 6222897
    Abstract: Scan methods of inspecting piping and welds of a pipe elbow in a reactor pressure vessel of a boiling water reactor are disclosed. The scan apparatus includes a motor connected to a scan head having two ultrasonic transducer probes each including an ultrasonic transducer, a transducer arm connected to each transducer probe, a scan platform having an arcuate cutout, and a connector connecting each transducer arm to the scan platform. The scan head allows the transducer probes to remain substantially in contact with the pipe elbow while the scan head traverses the pipe elbow. The scan apparatus further includes a pivot arm connecting the scan platform to a pivot pin. The method includes the steps of positioning the scan head and the transducer probe such that the ultrasonic transducer is substantially in contact with the pipe elbow surface. Then moving the scan head axially along the pipe elbow in a first direction while maintaining the ultrasonic transducer in substantial contact with the pipe elbow surface.
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: April 24, 2001
    Assignee: General Electric Company
    Inventors: Richard M. Hatley, Terry S. Rockwood
  • Patent number: 5969255
    Abstract: A system for ultrasonic inspection of a tubular member using an ultrasonic inspection unit having a platform, a guide member with a longitudinal axis, a wheel connected to the platform and contacting a surface of the tubular member for moving the platform along and around the tubular member relative to a rotation of the tubular member, and a bearing support connected to the platform at a location spaced from the wheel. The bearing support contacts the guide member for supporting the platform on the guide member and allowing the platform to move longitudinally in a direction along the longitudinal axis of the guide member in response to the moving of the guide wheel. A tubular member rotation mechanism receives the tubular member and rotates the tubular member around a longitudinal axis of the tubular member.
    Type: Grant
    Filed: September 5, 1997
    Date of Patent: October 19, 1999
    Inventor: Ted McLean
  • Patent number: 5963030
    Abstract: An openable ring assembly is externally centered around and moved parallel to the centerline of a stationary pipe. As a low-frequency EM source signal is applied to the ring assembly, the time and/or frequency shifts of a detected EM signal from the source signal can be correlated to pipe wall thickness without removal of external pipe insulation and metal cladding, if present. The ring assembly may be opened or expandably segmented to allow pipe thickness detection around obstructions or larger diameter pipe. Centering is preferably accomplished by using rollers circumferentially attached to the ring assembly.
    Type: Grant
    Filed: March 30, 1998
    Date of Patent: October 5, 1999
    Assignee: Union Oil Company of California
    Inventor: Mitchel A. Stark
  • Patent number: 5864065
    Abstract: A railroad wheel test apparatus for sensing and mapping the subsurface of a railroad wheel tread face has a housing assembly with a holding device, a wheel transfer arrangement, a transducer assembly, a positioning and moving table for the transducer and a control apparatus for receiving evaluation signals from the transducer and also for communicating control signals to the positioning table and wheel transfer devices as well as a drive apparatus, where the wheel is positioned in a fluid bath and while the wheel is rotated the transducer imposes an ultrasonic signal on the tread face and receives the response signal therefrom to provide a map of the tread-face subsurface structure.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: January 26, 1999
    Assignee: Amsted Industries Incorporated
    Inventors: Raymond F. Prorok, Christopher J. Kuznieski, William J. Kucera
  • Patent number: 5686668
    Abstract: A cart for inspecting a drill pipe having a platform with an ultrasonic inspection unit thereon, a first pair of wheels connected to the platform so as to move the platform longitudinally along the drill pipe relative to a rotation of the drill pipe, and a bearing connected to the platform at a location distal of the first pair of wheels. The bearing serves to support the platform above an adjacent drill pipe and allows the platform to move longitudinally along the adjacent drill pipe in correspondence with the movement of the first pair of wheels. The first pair of wheels are canted at an angle relative to the longitudinal axis of the drill pipe. A sensor wheel extends outwardly of the platform and rotates during the movement of the platform along the drill pipe. The platform has at least one handle extending upwardly from the platform. The bearing includes a pair of rollers that have an axis of rotation which is transverse to the longitudinal axis of the adjacent drill pipe.
    Type: Grant
    Filed: October 8, 1996
    Date of Patent: November 11, 1997
    Inventor: Ted McLean
  • Patent number: 5646351
    Abstract: The invention is an ultrasonic surface hardness depth measurement apparatus and method permitting rapid determination of hardness depth of shafts, rods, tubes and other cylindrical parts. The apparatus of the invention has a part handler, sensor, ultrasonic electronics component, computer, computer instruction sets, and may include a display screen. The part handler has a vessel filled with a couplant, and a part rotator for rotating a cylindrical metal part with respect to the sensor. The part handler further has a surface follower upon which the sensor is mounted, thereby maintaining a constant distance between the sensor and the exterior surface of the cylindrical metal part. The sensor is mounted so that a front surface of the sensor is within the vessel with couplant between the front surface of the sensor and the part.
    Type: Grant
    Filed: September 18, 1995
    Date of Patent: July 8, 1997
    Assignee: Battelle Memorial Institute
    Inventors: Morris S. Good, George J. Schuster, James R. Skorpik
  • Patent number: 5641909
    Abstract: Apparatus is disclosed for providing one hundred percent inspection of natural gas mains under operating flow conditions. The apparatus includes a scan unit assembly which is inserted into the gas main to collect data for the production of graphic images of the wall of the gas main. The scan unit includes a plurality of scan rollers, each containing an ultrasonic transducer, which traverse the surface of the wall defining the inner diameter of the gas main. The ultrasonic transducers transmit interrogating pulses into the wall of the gas main at a pre-determined spaced apart interval resulting in a helical scan pattern of interrogating pulses. The return pulses from the surfaces defining the inner diameter and outer diameter of the gas main and any imperfections and/or flaws within the wall of the main are received by the transducer and transmitted to a display unit for a visual indication (a tomograph) of the wall of the gas main.
    Type: Grant
    Filed: April 5, 1994
    Date of Patent: June 24, 1997
    Assignee: Gas Research Institute
    Inventors: Karl F. Kiefer, Gerard T. Pittard, Donald L. Chaffee, C. Grissom Steele, Terry P. Clifton
  • Patent number: 5585565
    Abstract: A transducer assembly and method for the ultrasonic inspection of tubing. An elastic membrane is used to form a reservoir of ultrasonic fluid coupled to ultrasonic transducers with the membrane conforming to the surface of the tubing being inspected. Guide wheels maintain the membrane out-of-contact with the tubing during relative rotational movement of the assembly and tubing during inspection. Water is introduced between the membrane and the tubing to provide ultrasonic coupling of the tubing to the transducers through the fluid of the reservoir.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: December 17, 1996
    Assignee: Tuboscope Vetco International, Inc.
    Inventors: James D. Glascock, Roy D. Felkner, Gene M. Holmes
  • Patent number: 5157977
    Abstract: The apparatus of the present invention is a machine for feeding, indexing, testing, and storing tubular goods. The machine concentrates on the end segments of the tubular goods. The machine uses the eddy current test method to test the outer surface, the inner surface, and internal and external threads. The tests may be conducted simultaneously and at each end of the pipe. The pipe is spun during the examination so that the sensors of the inner and outer surfaces, when driven, trace a helical pattern on the pipe, and the thread sensor is driven along the thread by the rotational force applied to the pipe being tested.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: October 27, 1992
    Assignee: Tuboscope Vetco International Inc.
    Inventor: Roy C. Grubbs
  • Patent number: 5113697
    Abstract: Process and apparatus for the detection of discontinuities in long workpieces such as pipes, tubes, rods and bars using vibrational transducer equipment transmitter pulses in separate directions about the workpiece.
    Type: Grant
    Filed: January 12, 1990
    Date of Patent: May 19, 1992
    Assignee: Mannesmann AG
    Inventor: Friedheim Schlawne
  • Patent number: 5108693
    Abstract: Nuclear fuel cladding tube end plug welds are ultrasonically scanned to develop data indicative of weld thickness, weld penetration, and the existence and size of any included feature, such as pores. A computer analyzes the data to determine critical weld characteristics which are then tested against established quality assurance standards to see if the end plug weld is acceptable, all on an automated production line basis.
    Type: Grant
    Filed: September 28, 1988
    Date of Patent: April 28, 1992
    Assignee: General Electric Company
    Inventors: James D. Landry, Mark A. Joyce, John D. Young, Robert S. Gilmore, Frederick C. Schoenig, Jr.
  • Patent number: 5036707
    Abstract: The present invention provides an apparatus and method for ultrasonically testing the internal neck-shoulder region of a large number of gas cylinders for radially oriented defects. The apparatus and method includes housing an ultrasonic transducer within a shoe in a predetermined orientation wherein the transducer is wedged at a wedge angle so that ultrasonic pulses travel directly through the shoulder region to the top and bottom of the internal neck-shoulder region and is also outwardly skewed within the shoe at a skew angle such that the radially oriented defects reflect the ultrasonic pulses and produce return echoes. An automated scanner moves the shoe and therefore, the transducer in a predetermined pattern such that the entire internal neck-shoulder region of the gas cylinder is scanned. The scanner is supported by a stand that allows the automated scanner to be rapidly set up on the gas cylinders being tested.
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: August 6, 1991
    Assignee: The BOC Group, Inc.
    Inventors: Richard C. Paciej, Robert E. Lewis
  • Patent number: 5007291
    Abstract: Pipe inspection apparatus comprising transducers for transmitting pulsed beams of ultrasonic energy longitudinally, transversely and obliquely into the wall of the pipe for detection of flaws. The apparatus includes a motor driven chuck 18 for rotating the transducers about the a pipe P and motor driven roller 12 for axial movement of the pipe whereby the transducers move in a helical scanning path. A control system 60 maintains the axes of the pipe and circle array of transducers in coincidence and with hydraulic controls 80 maintains each transducer at fixed distance to the pipe for sonically coupling thereto by a flowing liquid whereby a shear wave is generated by each beam in the tubular wall. The transducers comprise multiple pairs, the members of which are diametrically opposed and transmit in opposite directions, for transmitting longitudinally at angles of, and
    Type: Grant
    Filed: October 5, 1989
    Date of Patent: April 16, 1991
    Assignee: Scan Systems, Inc.
    Inventors: William T. Walters, Carroll R. Thompson
  • Patent number: 4918989
    Abstract: According to the method of the invention concerning tubes, of which the plating to be checked is at least 0.4 mm thick and in which the acoustic impedance differs by at least 1% relative from that of the core of the tube, a properly dampened transducer is selected which has a frequency of 4 to 10 MHz. The position of the transducer in respect to the tube is adjusted experimentally, and its parameters of distance and orientation are differently adjusted in order to increase the "signal-to-noise" ratio. For determining the thickness of the plating, at least one double echo from the interface between the plating and the tube core is used, or alternatively, a triple echo from this interface. Also, there is a corresponding ultrasonic measuring apparatus as well as an application of the method to the ultrasonic measuring of the thickness of the plating of Zr alloy tubes. The tubes are plated with non-alloyed Zr or with some other Zr alloy.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: April 24, 1990
    Assignee: Compagnie Europeenne du Zirconium - CEZUS
    Inventors: Didier Desruelles, Andre Bodin, Philippe Moinard
  • Patent number: 4905516
    Abstract: The invention relates to a wall thickness measuring device for pipes and the like, more particularly of extruded plastics, having a measuring head (15) connected to measuring and supply leads. The measuring head is mounted to be reversed around an opening of passage A for the pipe to be measured by means of a guide (14) attached to a frame having the opening of passage. The measure and supply leads (22-25) are acommodated in two guide chains (20, 21) which extend in opposite directions, partly on an inner guideway (18) and the other part on a guideway (19), connected thereto, of a guide core member (17). The guide core member (17) is basically constructed in the form of a portion of a circle and is disposed concentrically of the opening of passage (5) and can be moved therearound.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: March 6, 1990
    Assignee: Inoex GmbH Innovationen und Ausrustungen fur die Extrusionstechnik
    Inventor: Volkmar Wolfl
  • Patent number: 4893512
    Abstract: A swinging-type apparatus for automatically examining pipes includes first and second clamping devices provided at the ends of an extendible body. The first clamping device is made to clamp a first pipe, the second clamping device is made to unclamp the first pipe, is lifted up away from the first pipe, swung to an adjacent second pipe to be examined, lowered down to the second pipe and made to clamp the same. Next, the first clamping device is made to unclamp the first pipe, is lifted up away from the first pipe, swung to the second pipe, lowered down to the second pipe and made to clamp the same. Sensors provided on at least one of the clamping devices then examine the second pipe. By repeating these operations, the apparatus can be made to travel from one pipe to another to examine a cluster of pipes. The apparatus can also be made to move along a pipe axially thereof by extending and shortening the length of the extendible body.
    Type: Grant
    Filed: May 17, 1988
    Date of Patent: January 16, 1990
    Assignees: Doryokuro Kakunenryo Kaihatsu Jigyodan, Sugino Machine Limited
    Inventors: Kenichi Tanimoto, Osamu Kakuma
  • Patent number: 4872130
    Abstract: A real-time ultrasonic pipe inspection system is provided which utilizes computer processing methods in real-time to create a user-friendly interactive environment achieving ease of operation as well as a combination of consistency, thoroughness and speed in flaw and thickness detection. Two computers are utilized in a distributed processor configuration wherein one of the computers is dedicated to user input/output, while the second controls real-time processing of ultrasonic data with the two computers being connected via a communications highway. Simultaneous dual level sensitivity inspection of a plurality of separate probed areas is possible. Data input is provided via a touch sensitive CRT, while pipe status can be indicated with automatic color-coding, graphic presentation on a system CRT or hard copy. The system is provided with ultrasonic wheel probes comprising rotably mounted transducer block and yoke assemblies for rapid adjustment of helical scan angle for different sized pipe.
    Type: Grant
    Filed: May 13, 1987
    Date of Patent: October 3, 1989
    Inventor: Dominick A. Pagano
  • Patent number: 4843884
    Abstract: A method, apparatus and system for the ultrasonic detection and evaluation of flaws in annular test objects including an arrangement of ultrasonic transducers that are rotated about the outer surface of the test object and provide an ultrasonic indication fo flaws in the object, and for electronically collecting, storing, and analyzing the flaw data gathered by the ultrasonic transducers, to further provide a predetermined objective indicia of acceptablility concerning the structural integrity of the test object.
    Type: Grant
    Filed: November 6, 1986
    Date of Patent: July 4, 1989
    Assignee: Gas Research Institute
    Inventors: Larry J. House, James F. Mank, Thomas A. Pettenski, William J. Williams, Donald T. Hayford
  • Patent number: 4785668
    Abstract: The instant invention relates to an apparatus and method for inspecting the structural integrity of drill collars used in the drilling of oil and gas wells.
    Type: Grant
    Filed: April 14, 1987
    Date of Patent: November 22, 1988
    Inventor: Dominick A. Pagano
  • Patent number: 4718277
    Abstract: An ultrasonic inspection device having an array of opposing transducers that longitudinally, transversely, and obliquely transmit sonic beams through tubular members having a range of diameters such that refracted beams meet on the inner surface of the members. Alternate halves of the array of transducers transmit and receive sonic beams reflected from defects in the tubular members using both the pulse-echo and pitch-catch methods.
    Type: Grant
    Filed: December 12, 1985
    Date of Patent: January 12, 1988
    Assignee: Sound Optics Systems, Inc.
    Inventor: James D. Glascock
  • 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: 4679437
    Abstract: A method of reliably detecting flaws in a thick wall steel pipe with an ultrasonic beam in which flaws of the internal surface of the pipe are detected using a shear wave mode. The transmitting probe is disposed slantingly relative to both the longitudinal and transverse directions of the pipe so that the shear wave emitted therefrom is incident onto the pipe at a refraction angle of 35 to 70 degrees, whereby the beam inside the walls of the pipe is made to impinge on surface flaws of the inner surface of the pipe at an angle in the same range.
    Type: Grant
    Filed: October 4, 1985
    Date of Patent: July 14, 1987
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Mitsuhiro Koike, Nobuaki Yakoh
  • Patent number: 4672852
    Abstract: A test manipulator externally applicable to a pipe, preferably for ultrasonically testing welded seams, the manipulator having a divided race for surrounding a pipe which is to be tested, a guide segment guiding the race at the periphery thereof, a test system carrier drivable in peripheral direction around the pipe, a driving and positioning device for the test system carrier and at least one test head holder fastenable to the test system carrier includes clamping means for fastening the race directly to the pipe in centered relationship to an adjustment mark located on the pipe; a guide segment mounted so as to be movable along the periphery of the race; an outrigger unit flangeable, together with the test system carrier and the test head holder, to the guide segment; and a saddle fastenable to the pipe in centered relationship to the adjustment mark; alternatively, during testing of a so-called pipe connection seam, the guide segment being movable on the saddle in axial direction of the pipe, and the race,
    Type: Grant
    Filed: August 16, 1984
    Date of Patent: June 16, 1987
    Assignee: Kraftwerk Union Aktiengesellschaft
    Inventors: Georg Gugel, Erich Haas
  • Patent number: 4665734
    Abstract: For selective detection of microscopic defects in a workpiece to be checked presenting at least one macroscopic discontinuity of known nature, upon relative motion in respect to such workpiece according to a given check line, detecting the times when such check line meets a discontinuity, and searching for any possible defects in the workpiece intermittently for time intervals defined in reference to said times. This applies in particular to inspection of weld seams of welded tubes.
    Type: Grant
    Filed: April 3, 1985
    Date of Patent: May 19, 1987
    Assignee: S.A. Vallourec
    Inventor: Francois Joet
  • Patent number: 4641532
    Abstract: Apparatus for adjustably mounting ultrasonic testing devices around a rod end weld for providing water path adjustment to maintain predetermined focal depths of the testing devices, such as transducers. The apparatus enables the transducers to be adjustably radially located with respect to the rod end weld to be tested in order to establish a desirable ultrasonic beam normality. The apparatus provides for the remote actuation thereof.
    Type: Grant
    Filed: December 27, 1984
    Date of Patent: February 10, 1987
    Assignee: Westinghouse Electric Corp.
    Inventor: Edwin H. Rohrer
  • Patent number: 4641531
    Abstract: An ultrasonic inspection apparatus is shown for locating multiple defects in eccentric wall tubing or goods. A plurality of transducers are arranged in mated pairs, each of the pairs including a sender element for transmitting an ultrasonic shear wave and a receiver element for receiving a reflected ultrasonic wave component from the tubular goods being inspected. Each sender element is a point focus transducer having sufficiently high resolution to maintained detectability of defects in the tubular goods. Each receiver element is a wide focal width transducer having a large effective beam width area to compensate for eccentricity in the wall of the tubular goods.
    Type: Grant
    Filed: March 27, 1986
    Date of Patent: February 10, 1987
    Inventors: Roger D. Reeves, Dale F. Hawkey
  • Patent number: 4640131
    Abstract: A method for the ultrasonic testing of bolts for incipient cracks emanating from a wall thickness discontinuity between thinner and thicker parts of the bolt, which includes placing an ultrasound transmitter and receiver in the form of a piezo-electric transducer on the periphery of the thicker part of the bolt with the discontinuity located in the near-field region, radiating longitudinal waves at an angle of to and transversal waves at an angle of to from the transducer in direction toward the discontinuity, and comparing the intensity of reflected transversal and longitudinal waves with an echo characteristic obtained from a test body corresponding to the bolt to be tested, having slots formed therein simulating incipient cracks of different depths, and an apparatus for carrying out the method.
    Type: Grant
    Filed: April 11, 1985
    Date of Patent: February 3, 1987
    Assignee: Kraftwerk Union Aktiengesellschaft
    Inventors: Michael Kroning, Georg Holzler, Roland Heumuller
  • Patent number: 4591995
    Abstract: For monitoring stranding machines for breakage or run-out of single strands, a device is employed which checks the rope or cable after stranding for uniformity of the rope or cable surface. For this purpose, an electrical image of the rope or cable surface is read into a memory and the measured values compared with this stored pattern during the further stranding process. In the event of deviations resulting from this comparison, disconnecting or other actuating elements are actuated in order to avoid the production of further faulty lengths of rope or cable. For reflection measurements, electromagnetic, optical or acoustic waves can be employed. Instead of scanning of the rope or cable surface based on reflection, corpuscular radiation which partially penetrates the rope or cable can be employed.
    Type: Grant
    Filed: March 8, 1983
    Date of Patent: May 27, 1986
    Assignee: Zellweger Uster Ltd.
    Inventor: Robert Schurch
  • Patent number: 4586379
    Abstract: Remote-controlled system for moving an ultrasonic transducer assembly around a pipe where it has a welded joint between a straight pipe section and a curved or straight pipe section. The system includes a platform movable along an arm projecting from a carriage on a track around the pipe, and a pressure cylinder and universal joint connecting the platform to the transducer assembly. Couplant fluid is fed continuously to the surface of the assembly engaging the pipe as it slides over the pipe.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: May 6, 1986
    Assignee: Virginia Corporation of Richmond
    Inventor: Frederick R. Burkhardt, Jr.
  • Patent number: 4574638
    Abstract: A device for detecting an end-shape of a steel tube which includes in combination: a plurality of detectors disposed around the circumference of a steel tube to be carried forward by a forwarding mechanism; and a detector position changing mechanism provided on each of the detectors to cause the same to move back and forth in the diametrical direction of the steel tube, the detector position changing mechanism being rotatable around the steel tube.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: March 11, 1986
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshihiro Omae, Tsugio Sekii
  • Patent number: 4562738
    Abstract: An automatic flaw detection apparatus comprises a supporting frame; a rotational frame supported inside the supporting frame in a freely rotatable manner by means of bearings; a hollow shaft which is supported by and inside the rotational frame, through the interior of which passes a material to be inspected; a holder which is disposed within the hollow shaft extending in the longitudinal direction of the axis of the hollow shaft and rotates in association with the hollow shaft, the a sensor incorporated in the holder to detect any defect in the material to be probed; and a signal transmission device which is placed between the hollow shaft and the rotational frame and comprises a stator section supported by the supporting frame and a rotor section supported by the hollow shaft or the rotational frame to be electrically in association with the stator section, and which transmits flaw detection signal from the sensor to the outside.
    Type: Grant
    Filed: April 4, 1984
    Date of Patent: January 7, 1986
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazuo Nakayama, Yukio Naito, Eiji Munesue