Patent ID: 7325431

Claim:
A leverage mechanism for use with a clamp die positioning linkage assembly, the leverage mechanism comprising: a bearing member having a bearing member axis; a pivot member having a pivot member axis, the pivot member fixedly attached to the bearing member such that the bearing member axis and the pivot member axis are substantially parallel and offset relative to one another; a bearing block for receiving and supporting the bearing member, the bearing block configured for attachment to a bend arm of a tube bending machine; a lever arm coupled to the bearing member for causing the bearing member to pivot about the bearing member axis; a drive link having a first end and a second end, the first end of the drive link being coupled to the pivot member so as to allow the drive link to pivot about the pivot member axis, wherein the second end of the drive link is configured to pivot about the pivot member axis; and a toggle link pivotally coupled to the second end of the drive link.