Patent ID: 7568254

Claim:
A machine for scrubbing or finishing a floor surface comprising carriage means adapted for translational movement over a floor surface, a workhead, an electric motor carried by the carriage means and arranged in use to drive the workhead and battery support means comprising a trolley which runs on rails mounted in said carriage means and adapted in use to support at least one battery as a source of electric power for driving the electric motor, wherein said battery support means are adapted to support said at least one battery so that said at least one battery can be positioned in a selected one of a range of positions relative to said workhead whereby the loading on said workhead can be varied as required by a detent arrangement which comprises a laterally projected pin on a handle and a cooperating locator plate which is formed with a plurality of upwardly opening slots each adapted to receive the pin, the slots being spaced from one another by a short distance in the direction of movement of the trolley along the rails.