DEVICE MEASURING INNER DIAMETERS OF LOW-RIGIDITY RINGS Russian patent published in 2002 - IPC

FIELD: measurement technology. SUBSTANCE: device includes case 1 with central hole. Measurement sectors 2 mounted for radial movement and loaded with return ring spring 3 are uniformly positioned in guides of case, over circumference. Guaranteed clearance equal to nominal diameter of measured ring is secured between butts of sectors 2 in process of diameter measurement. Indicator 4 and traveling rod 5 interacting with end with equal-arm lever 7 put on axle 6 and with other end with indicator 4 and measurement sectors 2 are placed in central hole of case 1. Traveling rod 5 has conical surface and measurement sectors have wedge surfaces. EFFECT: raised measurement efficiency, expanded measurement range. 2 dwg