Methods and apparatus for body weight support system

1. An apparatus, comprising:

a trolley having a drive assembly configured to movably suspend the trolley from a track;

a powered conductor operatively coupled to the track, the powered conductor being substantially parallel to the track, the powered conductor including at least one conductive inner surface, a portion of the trolley being disposed within the powered conductor and in contact with the at least one conductive inner surface to electrically couple the trolley to the powered conductor, the portion of the trolley configured to move within the powered conductor and along the at least one conductive surface when the trolley is moved along the track, the track, and the drive assembly each disposed outside of the powered conductor;

at least one patient attachment coupled to the trolley, the at least one patient attachment configured to support a single patient; and

a control system coupled to the trolley and at least operably coupled to the powered conductor.

2. The apparatus of claim 1 , wherein the patient attachment includes one of a passive coupling and an active coupling, the passive coupling configured to be coupled to a tether to couple the patient attachment to the trolley, the active coupling configured to be coupled to a patient harness.

3. The apparatus of claim 1 , wherein the trolley includes a patient support system, the patient support system configured to actively support a patient.

4. The apparatus of claim 1 , wherein the trolley includes the drive assembly and a torque transfer assembly, the drive assembly and the torque transfer assembly being driven simultaneously.

5. The apparatus of claim 1 , wherein the drive assembly includes a plurality of wheels, at least a portion of the plurality of wheels disposed above at least a portion of the track.

6. The apparatus of claim 1 , wherein the trolley is configured to be powered only from the powered conductor.

7. The apparatus of claim 1 , wherein the trolley is configured to be moved from a first position at an end of the track to a second position spaced apart from the end of the track.

8. An apparatus, comprising:

a housing;

a drive element disposed at least partially within the housing;

a wheel assembly coupled to the drive element and disposed at least partially within the housing; and

a patient support assembly coupled to the housing, the patient support assembly including a pulley movably coupled to a portion of the housing and a cam operably coupled to the pulley, the patient support assembly including a tether engaged with the pulley and configured to dynamically support a body weight of a patient, the pulley configured to pivot relative to the housing and about a vertical axis in response to a force associated with the body weight of the patient exerted on the tether, the cam configured to pivot relative to the housing about the vertical axis in response to the pivoting of the pulley, the cam exerting a reaction force when the cam pivots relative to the housing, the cam operably coupled to a sensor configured to detect pivoting of the cam.

9. The apparatus of claim 8 , further comprising:

a light source coupled to the housing, the light source configured to project a light path on a surface opposite the housing.

10. The apparatus of claim 8 , further comprising:

a light source configured to illuminate a target location on a surface opposite the housing.

11. The apparatus of claim 8 , further comprising at least one of a clutch or a brake associated with the drive element configured to inhibit movement of the drive element.

12. The apparatus of claim 8 , further comprising a second drive element coupled to the patient support assembly, the second drive element configured to dynamically support the patient.

13. An apparatus, comprising:

a trolley having a drive assembly, the drive assembly including a plurality of wheels configured to move along at least one surface of a track to move the trolley relative to the track;

a powered conductor operatively coupled and substantially parallel to the track, the powered conductor including at least one conductive surface in contact with a portion of the trolley to electrically couple the trolley to the powered conductor, the portion of the trolley configured to move along the at least one conductive surface when the trolley is moved along the track, a portion of the track disposed between at least one wheel from the plurality of wheels and the powered conductor to isolate the at least one wheel from the powered conductor;

at least one patient attachment coupled to the trolley, the at as one patient attachment configured to support a single patient; and

a control system coupled to the trolley and at least operably coupled to the powered conductor.

14. The apparatus of claim 13 , wherein the trolley is configured to be powered only from the powered conductor.

15. The apparatus of claim 13 , wherein the trolley includes a patient support system, the patient support system configured to actively support a patient.

16. The apparatus of claim 13 , wherein the drive assembly includes a first wheel front the plurality of wheels and a second wheel from the plurality of wheels, the first wheel from the plurality of wheels being in contact with a first surface of the track and the second wheel from the plurality of wheels being in contact with a second surface of the track such that the portion of the track is disposed between the first wheel from the plurality of wheels and the second wheel from the plurality of wheels.

17. The apparatus of claim 16 , wherein the portion of the track is disposed between the first wheel from the plurality of wheels and the powered conductor.

18. The apparatus of claim 17 , wherein the second wheel from the plurality of wheels is disposed between the portion of the track and the powered conductor.

19. The apparatus of claim 13 , wherein the conductive surface of the powered conductor defines a first plane, and

the drive assembly includes a first wheel from the plurality of wheels and a second wheel from the plurality of wheels, the first wheel from the plurality of wheels and the second wheel from the plurality of wheels being configured to move along at least one surface of the track to movably suspend the trolley from the track, the at least one surface of the track defining a second plane nonparallel to the first plane.

20. The apparatus of claim 19 , wherein the drive assembly includes a third wheel from the plurality of wheels, the third wheel from the plurality of wheels being configured to move along a surface of the portion of the track, the surface of the portion of the track defines a third plane parallel to the first plane.