Patent ID: 8820505
Filing Date: 2014-09-02
Classification: F16D

Abstract:
1. A pivot ring for a clutch, comprising: a first annular segment, a second annular segment and a radial segment, the first annular segment having a first face on a front side of the ring and the second annular segment having a second face, predominately opposing the first face, on a back side of the ring, the radial segment disposed between the first annular segment and the second annular segment, connecting the first annular segment and the second annular segment, the pivot ring being insertable between a pressure plate and a diaphragm spring of the clutch such that the first face contacts the diaphragm spring and the second face contacts the pressure plate, the pivot ring being configured so that tapering of the pressure plate when the pressure plate is overheated is allowed to occur without changing a diameter at which the first face contacts the diaphragm spring, wherein at least one of the first and second annular segments has protrusions.