Patent ID: 9726268
Date: 2017-08-08
CPC Classifications: A61G,F16H

Claim:
1. An apparatus, comprising: a sun gear rotatable about a center axis; a plurality of first planetary gears in mesh engagement with the sun gear; a plurality of second planetary gears each in mesh engagement with a corresponding first planetary gear; a wheel connected to each of the plurality of second planetary gears to allow the apparatus to traverse on the wheels over the ground such that when one of the plurality of second planetary gears rotates about its axis of rotation its corresponding wheel rotates about the same axis of rotation; wherein rotational force applied to the sun gear causes rotational force on the second planetary gears through the mesh coupling of the first planetary gears; and a braking gear rotatable about the center axis and in mesh engagement with the plurality of second planetary gears; where the apparatus is configured to operate in two rotational modes of operation, comprising: