Floor surface treatment apparatus with dolly

A floor surface treatment apparatus comprising:

• a wheeled vehicle having wheels supporting the vehicle and a floor surface treating unit in contiguity with the floor surface when the wheels of said vehicle are riding on the floor surface;
• and
• a dolly pivotally connected to the vehicle and being selectively positionable relative thereto about a pivot axis of the dolly between a support position in which the dolly supports the floor surface treatment apparatus with said floor surface treating unit raised off the floor surface and a non-support position in which the floor surface treatment apparatus is unsupported by the dolly, the dolly having at least three wheels mounted thereon for conjoint pivoting movement with the dolly about the pivot axis of the dolly, said at least three wheels being arranged relative to each other on the dolly such that in the support position of the dolly the at least three wheels engage the floor surface to stably support the floor surface treatment apparatus with said floor surface treating unit raised off of the floor surface.

Apparatus for treating the surface of a floor, said apparatus comprising:

• a wheeled vehicle having wheels supporting the vehicle and a floor surface treating unit in contiguity with the floor surface when the wheels of said vehicle are riding on the floor surface;
• and
• a dolly for transporting said apparatus from place to place with the floor surface treating unit substantially raised off the floor surface over which the dolly is transported, the dolly being pivotally connected to the vehicle for movement between a raised, retracted position of stowage on the vehicle and a lowered position supporting the vehicle with the floor surface treating unit raised off the floor surface.