Patent ID: 7354348

Claim:
A hollow universal joint comprising: a first member, a second member, and a first hollow yoke ring coupling the first member to the second member to transfer rotational motion between the first and second members, the first hollow yoke ring having a first central axis and the first hollow yoke ring comprising a first pair of first pivot points pivotally coupled with the first member, the first pivot points defining a first axis extending therebetween and the first pivot points being spaced from the first central axis, the first hollow yoke ring comprising a second pair of second pivot points pivotally coupled with the second member, the second pivot points defining a second axis extending therebetween and the second pivot points being spaced from the first central axis, the first axis extending orthogonal to the second axis and the first and second axes each extending orthogonal to the first central axis, the first hollow yoke ring comprising a first pair of opposing first arches having first apexes that define the first pivot points, and the first hollow yoke ring comprises a second pair of opposing second arches having second apexes that define the second pivot points where the first apexes define second common feet for the second arches and the second apexes define first common feet for the first arches, wherein the first axis is offset along the first central axis from the second axis.