A robot that includes an arm coupled to a platform. The arm includes an
actuator that moves a second arm linkage relative to a first arm linkage.
In a first mode of operation the actuator moves the second linkage in a
first degree of freedom. In a second mode of operation the actuator moves
the second linkage in a second degree of freedom. The use of a single
actuator to provide two degrees of freedom reduces the number parts and
associated cost of the arm. The arm further includes a grasper that can
grab an object such as a wheelchair. The robot can be used to push the
wheelchair. Commands to operate the robot can be generated at a remote
input station and transmitted through a broadband network.
