Patent ID: 8519290

Claim:
A non-homogeneous cam comprising: an eccentric disk comprising: two side surfaces having an opening extending therethrough, and a cam surface disposed between the two side surfaces, wherein the cam surface is defined by a first radius extending from a point within the opening to a number of first portions of the cam surface and by a plurality of second radii extending from the point within the opening to a plurality of second portions of the cam surface; wherein the first radius is greater than each of the second radii, wherein the cam surface comprises a first cam surface generally having the first radius and a second cam surface having a plurality of the plurality of second radii, wherein the first cam surface and the second cam surface define an angle of less than 90 degrees, wherein the eccentric disk is generally made of a first material having a first strength, and wherein a portion of the eccentric disk between the first cam surface and the second cam surface is made of a different second material having a second strength greater than the first strength.