Damper mechanism with undulated ribbon-like spring having means for restricting radial movement of the spring

A damper mechanism comprising:

• an input plate;
• an output plate coupled to said input plate for limited rotary displacement therewith, said input plate and said output plate at least partially defining an annular chamber;
• an undulated ribbon-like spring disposed in said annular chamber, said undulated ribbon-like spring disposed between said input and output plates damping vibrations therebetween in response to relative rotary displacement between said input and output plates;
• a pair of opposing annular plates, said pair of plates disposed within said annular chamber with said undulated ribbon-like spring positioned therebetween;
• said undulated ribbon-like spring comprising a single elongated strip of material shaped to form a plurality of first ring portions, second ring portions and a plurality of lever portions, said lever portions extending between said first and second ring portions, said undulated ribbon-like spring being arcuately shaped to conform to a shape of said annular chamber such that said first ring portions generally define an inner circumferential edge of said undulated ribbon-like spring and each of said second ring portions generally define an outer circumferential edge of said undulated ribbon-like spring;
• and
• at least one pin extending through said undulated ribbon-like spring and extending through said pair of plates such that said pin engages a radially outer side of one of said first ring portions between adjacent ones of said lever portions thus restraining radially outward movement of said undulated ribbon-like spring thereby limiting contact between said undulated ribbon-like spring and a circumferentially outer surface of said annular chamber in response to centrifugal forces and compressive forces acting on said undulated ribbon-like spring.