Inventor
GRADICH FRANCIS X
US7 patents
Patents
7 patentsUS5200704AApr 6, 1993
System and method including a buried flexible sheet target impregnated with ferromagnetic particles and eddy current probe for determining proximity of a non-conductive underground structure
WESTINGHOUSE ELECTRIC CORP25 citations92
US4876506AOct 24, 1989
Apparatus and method for inspecting the profile of the inner wall of a tube employing a wall follower and an eddy current probe
WESTINGHOUSE ELECTRIC CORP50 citations92
US4725883AFeb 16, 1988
Optical profilometry system for tubular products
WESTINGHOUSE ELECTRIC CORP41 citations92
US5373235ADec 13, 1994
System and method using portable wall engaging ferromagnetic particle impregnated target medium for electromagnetically measuring distance between oposing walls of a structure
WESTINGHOUSE ELECTRIC CORP16 citations81
US5100610AMar 31, 1992
Tube plug inspection system
WESTINGHOUSE ELECTRIC CORP19 citations71
US4992735AFeb 12, 1991
System and method for inspecting metallic plugs in heat exchanger tubes using a radially extendible probe
WESTINGHOUSE ELECTRIC CORP11 citations69
US4704577ANov 3, 1987
Eddy currents probe for measuring a gap between a tube and an antivibration bar
WESTINGHOUSE ELECTRIC CORP16 citations69