Patent ID: 7152882
Filing Date: 2006-12-26
Classification: B62D,Y10S

Abstract:
1. A mobile carriage comprising: a base frame, a front wheel and a rear wheel disposed under the base frame, wheel rotating means coupled to the front wheel and the rear wheel for rotatingly driving the wheels, power source means for the wheel rotating means, center-of-gravity shifting means having a weight portion disposed above and moveable relative to the base frame and a mechanism for moving the weight portion relative to the base frame to shift the position of the center of gravity of the base frame by moving the weight portion by the mechanism for moving, said weight portion being connected to said base frame by at least one rod pivotably connected at one end to said base frame and pivotably connected at the other end to said weight portion, control means for controlling the wheel rotating means and the mechanism for moving, and at least one of the wheel rotating means, the power source means and the control means being utilized as the weight portion of the center-of-gravity shifting means.