Abstract:
An instrumented, load-sensing washer that can be used on a bolted joint to facilitate determining an axial clamping load of the bolted joint. The washer includes an annular washer body having first and second oppositely disposed axial ends and an outer circumferential sidewall. At least one strain gauge is provided on the circumferential sidewall and is configured to sense a deformation of the washer body do to clamping forces of the bolted joint. The washer further includes a communication assembly operatively coupled with the at least one strain gauge. The communication assembly may include an integrated circuit adapted to receive electrical signals from the at least one strain gauge related to the axial load borne by the washer.
Abstract:
The device connects a first end-coupler (1) with a second end-coupler (2), in particular of a piping. A nut (15) is provided with a threaded bore (17) in which the first end-coupler (1) is screwed along a longitudinal axis (X). In a tightening position, the first end-coupler (1) is in axial stress with a second end-coupler (2) accommodated in the nut. Anti-rotation means are provided between the nut (15, 115) and at least one (2) of the end-couplers to prevent relative rotation except when a torque exceeding a predetermined threshold is applied thereto. The anti-rotation means consist of at least one tab (21) made in the material of the nut (15) to lockingly interfere with substantially planar faces formed on the second end-coupler (2).