Patent ID: 6945600

Claim:
A method of actuating an ergonomic device comprising: rotating a pulley via a lever, drive shaft and drive clutch; controlling said rotating step by a locking clutch interaction step comprising: freewheeling of said rotation in a selected first rotational direction upon application of rotational force in said selected first direction; locking said pulley from rotating in a second rotational direction opposite said selected first direction upon removal of said rotational force in said first direction; selectively releasing said locking of said locking clutch upon application of rotational force in said second rotational direction; selectively applying a rotational force in said first direction or said second direction with said lever and said drive shaft by camming at least one cam block within said drive clutch; returning said lever to a neutral position via a spring when rotational force is released; transferring said rotational force to a tractive force via a cable end attached to said pulley; and actuating said ergonomic device via a second cable end attached to said ergonomic device.