GEAR WITH MULTIPLE MAGNETIC TOOTH ENGAGEMENT

1 . A magnetic gear system, comprising:

a first disk having a first axis and a plurality of first magnets; and

a second disk having a second axis and a plurality of second magnets,

wherein the first and second axes are not collinear, and

magnetic interactions between multiple ones of the first magnets and multiple ones of the second magnets cause the second disk to rotate when the first disk is rotated.

2 . The system of claim 1 , further comprising a third disk having a plurality of third magnets,

wherein magnetic interactions between multiple ones of the second magnets and multiple ones of the third magnets cause the second disk to rotate when the third disk is rotated.

3 . The system of claim 2 , wherein the first disk and the third disk rotate about the first axis.

4 . The system of claim 3 wherein the third disk is fixed to the first disk such that the first and third disks rotate together at a first rotational velocity.

5 . The system of claim 1 , wherein the plurality of first magnets are positioned at a first distance R 1 from the first axis, and

the plurality of second magnets are positioned at a second distance R 2 from the second axis.

6 . The system of claim 5 , wherein the sum of R 1 and R 2 is greater than a distance D 1 between the first axis and the second axis.

7 . The system of claim 6 , wherein the first axis is substantially parallel to the second axis.

8 . The system of claim 5 , wherein the first axis is substantially parallel to the second axis.

9 . The system of claim 2 , wherein the third and first axes are not collinear, and the second and first axes are not collinear.

10 . The system of claim 9 , wherein the first, second and third axes are substantially parallel.

11 . A method of transferring rotation with a magnetic gear system, the method comprising:

rotating a first disk having a plurality of first magnets around a first axis; and

causing a second disk having a second axis and a plurality of second magnets to rotate due to magnetic interactions between multiple ones of the first magnets and multiple ones of the second magnets when the first disk is rotated,

wherein the first and second axes are not collinear.

12 . The method of claim 11 , further comprising

rotating a third disk having a plurality of third magnets, and

causing the second disk to rotate due to magnetic interactions between multiple ones of the third magnets and multiple ones of the second magnets when the third disk is rotated.

13 . The method of claim 12 , wherein the first disk and the third disk rotate about the first axis.

14 . The method of claim 13 wherein the third disk is fixed to the first disk such that the first and third disks rotate together at a first rotational velocity.

15 . The method of claim 11 , wherein the plurality of first magnets are positioned at a first distance R 1 from the first axis, and

the plurality of second magnets are positioned at a second distance R 2 from the second axis.

16 . The method of claim 15 , wherein the sum of R 1 and R 2 is greater than a distance D 1 between the first axis and the second axis.

17 . The method of claim 16 , wherein the first axis is substantially parallel to the second axis.

18 . The method of claim 15 , wherein the first axis is substantially parallel to the second axis.

19 . The method of claim 12 , wherein the third and first axes are not collinear, and the second and first axes are not co-linear.

20 . The method of claim 19 , wherein the first, second and third axes are substantially parallel.