Patents by Inventor Valentino S. Cecco

Valentino S. Cecco has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5506503
    Abstract: An eddy current probe for insertion into a tube to be inspected includes a transmitter coil and a pair of sensing coils. The pair of sensing coils have opposite polarity relative to one another and are series connected to provide a differential output. The pair of sensing coils and the transmitter coil are disposed on the surface of the probe. The pair of sensing coils being equally spaced from the transmitter coil and separate from each longitudinally on the probe. Each sensing coil in the pair of sensing coils is thereby angularly displaced from a plane transverse to the probe as measured from the transmitter coil with which a multi-coil unit is formed. Bracelets of coils are formed from plural multi-coil units aligned around the probe to improve sensitivity of the probe. Additional bracelets of coils may be added to the probe, offset rotationally, to improve coverage of the tube.
    Type: Grant
    Filed: January 7, 1993
    Date of Patent: April 9, 1996
    Assignee: Atomic Energy of Canada Limited
    Inventors: Valentino S. Cecco, Frederick L. Sharp, Laura O. Marini
  • Patent number: 5453688
    Abstract: A probe used for inspecting tubes or pipes comprises an elongated flexible shaft, a plurality of axially spaced guides on the shaft, the guides being engageable with the inner surface of a tube for maintaining the shaft substantially concentrically disposed within the tube, and a housing for a sensing element, the housing being secured to the shaft for rotation therewith and disposed between a pair of the guides, the housing having a tube contact area for engagement with the inner surface of the tube. The sum of the radial displacement of the contact area from the axis of the shaft of each of the housing and guides is greater than the inner diameter of the tube so as to cause the shaft to urge the housing and the pair of guides in radially opposed directions.
    Type: Grant
    Filed: August 23, 1993
    Date of Patent: September 26, 1995
    Assignee: Atomic Energy of Canada Limited
    Inventors: Valentino S. Cecco, Werner E. Pantermoller
  • Patent number: 5237270
    Abstract: Eddy current probes for ferromagnetic tubes of relatively small diameters are disclosed. A probe housing is made of non-ferromagnetic material and shaped to be introduced into the tube for inspection. The probe housing includes at least two eddy current measuring assemblies either of these assemblies includes magnetic field generators for producing a maximum magnetization at a predetermined area of the tube and a minimum magnetization at a diametrically opposite area of the tube. At least one eddy current measuring coil is associated with each magnetic field generator to measure the eddy current generated in the tube and which has a relatively high sensitivity to an anomaly at the maximum magnetization area. Further the current measuring assemblies are spaced apart axially within the housing and are rotated about its central axis by a predetermined angle so that each assembly differs in sensitivity to an anomaly depending upon their location within the housing.
    Type: Grant
    Filed: October 11, 1990
    Date of Patent: August 17, 1993
    Assignee: Atomic Energy of Canada Limited
    Inventors: Valentino S. Cecco, Jon R. Carter
  • Patent number: 5117182
    Abstract: Eddy current probes for detecting defects in a ferromagnetic tube are disclosed. The probe uses partial magnetic saturation and includes two or more eddy current measuring coil assemblies in a probe housing. The coil assemblies are spaced apart from each other and located at positions of different magnetic saturation.
    Type: Grant
    Filed: June 8, 1990
    Date of Patent: May 26, 1992
    Assignee: Atomic Energy of Canada Limited
    Inventors: Valentino S. Cecco, Jon R. Carter
  • Patent number: 5049817
    Abstract: Eddy current probes for detecting internal defects in a ferromagnetic tube are disclosed. The probe uses a plurality of eddy current measuring means, each being operated at a different operating point on the impedance diagram. By operating more than one such eddy current measuring means simutaneously, noises by, for example, permeability variation of a ferromagnetic material and internal magnetic deposit, can be made less influential.
    Type: Grant
    Filed: June 8, 1990
    Date of Patent: September 17, 1991
    Assignee: Atomic Energy of Canada Limited
    Inventors: Valentino S. Cecco, F. Leonard Sharp
  • Patent number: 4855676
    Abstract: An eddy current probe capable of detecting localized defects in a ferromagnetic tube is disclosed. The probe employs a transmit coil assembly and a receive coil assembly. Means for magnetically saturating the tube near the transmit and receive coil assemblies is also disclosed.
    Type: Grant
    Filed: May 6, 1987
    Date of Patent: August 8, 1989
    Assignee: Atomic Energy of Canada Limited
    Inventors: Valentino S. Cecco, Jon R. Carter
  • Patent number: 4808924
    Abstract: An eddy current probe capable of detecting defects independent of orientation, with complete circumferential coverage in tubes, tubes under support plates, etc., is disclosed. The probe employs multiple coils, operating in transmit-receive mode, in which alternate coils are electromagnetically polarized in opposite directions. The probe detects localized defects and eliminates concentric variations.
    Type: Grant
    Filed: February 19, 1987
    Date of Patent: February 28, 1989
    Assignee: Atomic Energy of Canada Limited
    Inventors: Valentino S. Cecco, Richard McIlquham, F. Leonard Sharp
  • Patent number: 4808927
    Abstract: An eddy current probe capable of detecting localized defects with 100% circumferential coverage in tubes, tubes under support plates etc., is disclosed. The probe employs multiple receiver coils with each excitation coil, operating in transmit-receive mode in which alternate receiver coils are electromagnetically polarized in opposite directions. The probe detects localized defects and eliminates concentric variations.
    Type: Grant
    Filed: February 19, 1987
    Date of Patent: February 28, 1989
    Assignee: Atomic Energy of Canada Limited
    Inventors: Valentino S. Cecco, Richard McIlquham, F. Leonard Sharp
  • Patent number: 3952315
    Abstract: Eddy-current inspection for cracks, flaws, etc, in rails, rods, etc. is conventional. For ferromagnetic material structures, it is found to be advantageous to magnetically saturate the material during inspection. The inventive eddy current probe facilitates the inspection of ferromagnetic tubing by saturating the tubing from within and only in the region of the test coils. Inspection may therefore be carried out on tubing which is installed in systems such as steam generators. The probe includes a bobbin on which test coils are wound. The bobbin may consist of a permanent magnet having a field of sufficient stength to provide the necessary magnetic saturation, or the field may be supplemented by driving a direct current through one or more of the coils. In a third embodiment, the bobbin may be made from high .mu. material and the entire saturating field is provided by driving a direct current either through the test coils or through additional dc bias coils located on the bobbin.
    Type: Grant
    Filed: July 29, 1974
    Date of Patent: April 20, 1976
    Assignee: Atomic Energy of Canada Limited
    Inventor: Valentino S. Cecco