| 摘要 |
A device for cleaning a surface, such as a barbeque grill, has a substantially hollow enclosure that has at least a lower side, an upper side, and a peripheral edge, and contains a plurality of motors that each has a rotational shaft selectively fixable with a rotatable brush. At least a portion of bristles of each brush projects below a plane of the lower side of the enclosure. The enclosure further contains a power source and a circuit adapted for connecting power to each of the motors for a preset period of time upon actuation of an electrical switch connected thereto. The circuit is adapted to run each motor in a first direction and then an opposing direction, such that if the device becomes stuck at an obstruction, it will eventually turns around due to the alternating directions of the motors.
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