Electric utility brush with a dynamic brush head

1. An electric utility brush comprising an inner drive shaft and a concentric outer drive shaft; a rotatable head comprising a first part fixed to an end of the outer drive shaft, a second part rotatably mounted to the first part in driving engagement with the inner drive shaft, and a set of meshing gears provided between the inner drive shaft and the second part of the head, wherein the meshing gears comprise driving gear teeth and complementary driven gear teeth, wherein the rotatable head is spherical, the first and second parts being substantially hemispherical and wherein the driving gear teeth is formed integrally with an end of the inner drive shaft and the complementary driven gear teeth is formed integrally with an end face of the second part of the head.

2. The electric utility brush of claim 1 in which the first part is larger in size than the second part.

3. The electric utility brush of claim 1 in which the second part of the head comprises an axle projecting from an end face and the first part of the head comprises a complimentary socket in which the axle is seated.

4. The electric utility brush of claim 3 in which the head comprises a bearing disposed between the axle and the socket.

5. The electric utility brush of claim 4 in which the bearing comprises a bushing retained in the socket.

6. The electric utility brush of claim 5 in which the bushing comprising a sleeve within which the axle is located and a flange extending radially outward from an end of the sleeve and located between the first and second parts of the head.

7. The electric utility brush of claim 6 in which the flange defines at least a pair of parallel sides.

8. The electric utility brush of claim 1 in which the rotatable head comprises an array of bristles projecting from an outer surface.

9. The electric utility brush of claim 1 in which the utility brush comprises a sleeve at least partially surrounding the outer drive shaft.