Patent ID: 8511181
Filing Date: 2013-08-20
Classification: G01L

Abstract:
1. A variable torque rate test joint for the testing of rotary tools for threaded fasteners, comprising: a first element having an externally screw threaded shaft; a second element having an internally screw threaded bore; the screw threads of the first and second elements being engaged with one another so that relative rotation between the first and second elements can be effected by a tool under test; and means for exerting a variable force between the first and second elements in the axial direction of the shaft in order to vary the torque rate of the test joint, the force-exerting means comprising: characterized in that: the first element is fixed against rotation during testing of a tool; the second element is a nut mounted for rotation on the shaft of the first element when acted on by a tool under test.