Abstract: A torque limiting coupling for a driveline includes a fluid chamber within a twin walled sleeve for providing a fictional engagement with a shaft. A shear-off tube is in fluid connection with the fluid chamber and is assigned to a shear-off gate. The shear-off gate is fixedly connected to the shaft for opening the fluid chamber by shearing the shear-off tube with the shear-off gate. At least a first shear-off tube and a second shear-off tube are provided for closure of the fluid chamber and for interaction with the shear-off gate. The shear-off gate has at least one cut-off edge. At a position of a blockage of one of the shear-off tubes by one cut-off edge, the other shear-off tube is positioned at an unblocked position.

Abstract: A torque limiting coupling for a driveline has an input side that is connectable to a power unit and an output side that is connectable to a load. A first sensor is assigned to the input side and a second sensor is assigned to the output side of the torque limiting coupling to measure the rotational speed of the input and output side. At least an additional sensor or detector is assigned to the input and/or output side to enhance the resolution of the rotation measurement.