Drive-train torque-transmitting disk

In a drive system having

• an engine with an output element rotatable about an axis,
• a drive train having an input element rotatable generally about the same axis, and
• a coupling disk having an inner ring of bores by means of which it is bolted to the output element and an outer ring of bores by means of which it is bolted to the input element, the improvements wherein
• the disk is formed with a plurality of radially outwardly projecting and radially outwardly tapering generally sawtooth tabs separated by radially outwardly open, generally triangular, and radially inwardly tapering cutouts and each formed with a respective one of the outer bores, the cutouts extending radially inward past regions of contact between the tabs and the input element, the tabs each being formed with generally tangentially extending corrugations and each having a leading flank and a trailing flank relative to a normal direction of rotation of the elements about the axis, each leading flank extending at an acute angle to a centerline of the respective tab and each trailing flank extending generally parallel to the respective centerline.