Stator bore gage

A device for measuring a plurality of inside diameters of a positive displacement motor stator, comprising:

• a detector assembly comprising a body, a wheel assembly and a transducer assembly;
• the body having one or more slide portions configured for sliding contact with an interior surface of the stator;
• the wheel assembly coupled to the body substantially opposite the at least one slide portion such that at least a portion of the wheel assembly protrudes from the body for rolling contact with the interior surface of the stator;
• the detector assembly configured for relative displacement between the wheel assembly and the at least one slide portion in response to changes in the interior surface diameter;
• the transducer assembly located in the body, operatively coupled to the wheel assembly and configured to transduce displacement of the wheel assembly into electrical signals representative of an interior surface diameter of the stator;
• a translation assembly coupled to the detector assembly and configured to insert the detector assembly into the interior of the stator and to withdraw the detector assembly from the interior of the stator;
• the translation assembly having an adjustable length and comprising a handle portion having a power source and a conduit for communicating signals from the transducer assembly to the handle portion translation and one or more joints configured to allow relative rotation between the body and the handle;
• and
• a man-machine interface configured to wirelessly communicate with the body and to display the diametrical measurements of the interior surface as the body is withdrawn from the stator.