Patent ID: 8061208

Claim:
A scanner system for nondestructively scanning the outer circumference of a tubular object comprising: a main carriage having wheels at a first and second end of the main carriage and a frame that extends therebetween that supports a nondestructive sensor; a tensioner carriage having wheels at a first and second end of the tensioner carriage and a frame with a variable length connection between the first and second end of the tensioner carriage; an idler carriage having wheels at a first and second end of the idler carriage and a frame extending therebetween; and a spring band connecting the main carriage to the tensioner carriage and passing over an upper surface of the idler carriage frame between the main carriage and the tensioner carriage in a manner that urges the wheels on the main carriage, the tensioner carriage and the idler carriage against the outer circumference of the tubular object.