Patent ID: 7789175
Filing Date: 2010-09-07
Classification: A61G,B25J,B60B,B60Y,B62B,B62D

Abstract:
1. A modular dual-wheel assembly for a small scale machine, comprising: a frame; and a pair of wheel assemblies, each wheel assembly connected to the frame and comprising: wherein the rotational axis of each wheel assembly is collinear with the rotational axis of the other wheel assembly and each wheel assembly is controllably operable independently of the other wheel assembly such that the frame is rotatable around a pivot axis that is locatable anywhere on a common line of the collinear rotational axes; a hypocyclic cam having at least one cam lobe; at least one set of hypocyclic gears, each set comprising an inner hypocyclic gear and an outer hypocyclic gear; and a gear hub cap connected to the at least one inner hypocyclic gear and the wheel, the gear hub cap transmitting rotational motion of the inner hypocyclic gear to the wheel; a load bearing mounted around the outside of the at least one hypocyclic outer gear; a rim mounted on the outside of the load bearing; a tire mounted to the rim; and a load bearing retainer that maintains the load bearing in a desired position relative to the at least one outer hypocyclic gear, the load bearing retainer at least indirectly connected to the frame.