Patent ID: 7544146

Claim:
An anti-backlash speed reduction system having both gear and bearing characteristics, the system including: a first gear bearing having a first central axis and including a first plurality of gear teeth extending radially outward from the first central axis, each first gear tooth having a first discrete contact point for contacting a mating gear tooth of a mating gear, said first contact point disposed a first distance from the first central axis, a first roll surface element including a second discrete contact point for contacting said mating gear, wherein the second discrete contact point is also disposed substantially the first distance from the first central axis, and wherein the first gear bearing comprises top and bottom halves, each half of which can slide linearly with respect to each other and is biased apart from each other and the top and bottom halves are restrained from rotating with respect to each other, and the top and bottom halves have separate sets of gear teeth phase shifted out of phase with respect to each other.