Wearable device

1. A suspension for a wearable device configured to selectively provide roller transportation, comprising:

an axle at least partially circumferentially restrained along a length of the axle;

wherein the axle comprises a center of rotation located along a central axis of the axle; and

wherein an end of the axle that is coincident with the central axis of the axle is selectively rotatable about the center of rotation along a partial spherical sweep in both a forward-rearward direction and an upward-downward direction while maintaining a location of the center of rotation.

2. The suspension according to claim 1 , further comprising:

wherein at least a portion of the axle is received within a through hole.

3. The suspension according to claim 2 , further comprising:

at least one elastically deformable tophat.

4. The suspension according to claim 3 , wherein the at least one tophat is at least partially received within the through hole.

5. The suspension according to claim 4 , wherein the at least one tophat comprises urethane.

6. The suspension according to claim 4 , wherein at least a portion of the tophat is located circumferentially around the axle and within the through hole.

7. The suspension according to claim 6 , wherein the axle comprises a bolt head.

8. The suspension according to claim 7 , wherein the bolt head is offset from the through hole and at least a portion of the tophat is located between the bolt head and the through hole.

9. The suspension according to claim 8 , wherein the axle comprises ridges at least partially located within the through hole.

10. The suspension according to claim 8 , wherein the bolt head comprises a diameter greater than a diameter of the through hole.

11. The suspension according to claim 4 , wherein at least a portion of the tophat is located between the through hole and a wheel assembly carried by the axle.

12. The suspension according to claim 11 , wherein a suspension spacer is located between the tophat and the wheel assembly.

13. The suspension according to claim 12 , wherein the wheel assembly comprises a friction reducing coating adjacent the suspension spacer.

14. The suspension according to claim 1 , wherein the axle comprises a female axle bolt and a complementary male axle bolt.

15. The suspension according to claim 14 , wherein at least one of the female axle bolt and the male axle bolt comprise an integral relative position retainer feature.

16. The suspension according to claim 15 , wherein the integral relative position retainer feature comprises a knurled face of at least one of the female axle bolt and the complementary male axle bolt.

17. The suspension according to claim 2 , further comprising:

an inner tophat at least partially received within the through hole and at least partially extending from an inner end of the through hole; and

an outer tophat at least partially received within the through hole and at least partially extending from an outer end of the through hole.

18. The suspension according to claim 17 , wherein the portion of the inner tophat extending from the inner end of the through hole is restrained by a bolt head of the axle.

19. The suspension according to claim 1 , wherein the center of rotation is substantially coincident with the axis of rotation and wherein each of the suspension axis, the axis of rotation, and the center of rotation remain coincident during rotation of a wheel assembly that is carried by the axle about the axis of rotation and during perturbations of the suspension.

20. A suspension for a wearable device configured to selectively provide roller transportation, comprising:

an axle comprising an axle axis, the axle being at least partially circumferentially restrained along a length of the axle so that rotation of the axle about the axle axis is restricted;

wherein the axle is rotatable about a center of rotation that is coincident with the axle and located along the axle axis; and

wherein, while maintaining a location of the center of rotation, an end of the axle that is coincident with the axle axis is movable to substantially all points coincident with a circular perimeter of a spherical section having a spherical section center coincident with the center of rotation.

21. A suspension for a wearable device configured to selectively provide roller transportation, comprising:

an axle comprising an axle central axis, the axle being at least partially circumferentially restrained along a length of the axle;

wherein, while maintaining a location of the center of rotation, an end of the axle that is coincident with the axle axis is selectively orbitally movable about a center of rotation that is coincident with the axle and the axle axis; and

wherein the selective orbital movement comprises a first orbital path and a second orbital path that intersects the first orbital path.