Patent ID: 7001123
Filing Date: 2006-02-21
Classification: F16B,G01L

Abstract:
1. Threaded bolt, for use in ultrasonic measurement for determining the tension in the threaded bolt after it has been used in a connection, said bolt being formed as a single unitary piece of material having a proximal head end and a distal insertion end extended about a shank having a substantially cylindrical body and a longitudinal axis, the proximal head end and the distal insertion end are each provided with only a single, planer surface which is perpendicular to the longitudinal axis wherein the planer surfaces from radial measurement planes which are exposed in opposite axial directions, the radial measurement plane at the insertion end being formed by a freely exposed, flat bottom of a recess at the distal insertion end, wherein the recess is bounded by a first circumferential plane or surface which at a point of change transitions into a second circumferential plane or surface of the distal insertion end via a buckle, wherein the proximal head end is adapted to detachably receive a sensor for measuring a distance between said measurement planes, and wherein the proximal head end has an proximal outer end plane oriented perpendicular to the longitudinal axis, wherein the measurement plane at the proximal head end is located on and formed by the proximal outer end plane.