| 主权项 |
1. A cleaning appliance comprising a substantially spherical surface engaging rolling assembly comprising a fluid inlet for receiving a fluid flow and a system for drawing the fluid flow through the inlet, and a plurality of support members for supporting the rolling assembly as it is maneuvered over a surface, wherein the center of gravity of the cleaning appliance is located within the rolling assembly, wherein the rolling assembly comprises a main body and a plurality of floor engaging rolling elements rotatably connected to the main body, wherein the main body has a front surface, and wherein when the cleaning appliance is located on a substantially horizontal surface, the center of gravity of the cleaning appliance is located in a first vertical plane which is located between a second vertical plane containing the point of contact between the rolling assembly and the surface, and a third vertical plane containing the points of contact between the support members and the surface. |
