Patents by Inventor Frank Passarelli, Jr.

Frank Passarelli, Jr. 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).

  • Electromagnetic acoustic transducer with recessed coils
    Patent number: 6951133
    Abstract: The disclosed invention mounts transmitting and receiving electrical coils within channels or chambers formed by the notched ends of magnets closest to the metallic object under test where the magnets are arranged to form substantially annular arrays of an electromagnetic acoustic transducer pair applicable in non-destructive testing. The detection, preferably by tuned coils, of one or more electromagnetically-induced resonant frequencies at shifted locations indicates the presence of one or more flaws in the metallic structure under test.
    Type: Grant
    Filed: May 12, 2003
    Date of Patent: October 4, 2005
    Inventor: Frank Passarelli, Jr.
  • Electromagnetic acoustic transducer with recessed coils
    Patent number: 6561035
    Abstract: The disclosed invention mounts transmitting and receiving electrical coils (52, 54) within channels or chambers (48, 50) formed by the notched ends of magnets (24, 28) closest to the metallic structure under test (40) where said magnets (24, 28) are arranged to form annular arrays (20, 22) of an electromagnetic acoustic transducer (EMAT) pair applicable in non-destructive testing. The detection of one or more electromagnetically-induced resonant frequencies at shifted locations indicates the presence of one or more flaws (58, 60) in the metallic structure under test (40). The novel recessed mounting of the coils provided by the channels or chambers (48, 50) substantially reduces the observed electrical cross-talk between coils (52, 54) over the prior art and reduces the likelihood of the coils (52, 54) making contact with the subject metallic structure under test (40) as it is in longitudinal motion relative to the coils (52, 54).
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: May 13, 2003
    Inventor: Frank Passarelli, Jr.
  • Electromagnetic acoustic transducer flaw detection apparatus
    Patent number: 5808202
    Abstract: The subject invention is a method and apparatus for detecting a flaw in a metallic structure which utilizes a plurality of electromagnetic acoustic transducers located in close proximity to, but spaced from, the metallic structure. Each transducer includes a plurality of magnets located in a spaced apart arrangement. The magnets of one transducer are not aligned, thereby angularly displaced, with the magnets of a directly adjacent transducer. The position of the north and south poles of the magnets of each transducer alternate. The metallic structure is to be moved relative to those transducers. The detection of a resonant frequency at a shifted location indicates the presence of a flaw in the metallic structure the position of which is marked by a marking device.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: September 15, 1998
    Inventor: Frank Passarelli, Jr.