Patent ID: 8424142

Claim:
A pool cleaning robot for cleaning a surface of a swimming pool, said robot comprising: a main housing; main wheels being configured for propelling the robot and for rotating at a first angular velocity; two auxiliary brushwheels configured to rotate independently of one another and disposed between said main wheels; and at least one inlet being formed in a bottom panel of the housing between said main wheels and being configured for intake of water and debris; wherein said robot is configured for rotating said auxiliary brushwheel about an axis of rotation at a second angular velocity which is substantially greater than the first angular velocity; wherein said bottom panel has first and second halves being separated by an axis spanning along the bottom panel between midpoints of said main wheels, and wherein: a first of said auxiliary brushwheels is disposed substantially on a first side of said axis, and a second of said auxiliary brushwheels is disposed substantially on a second side of said axis; and a first of said inlets, being associated with the first brushwheel, is formed substantially in said first side between the first auxiliary brushwheel and a first of said main wheels, and a second of said inlets, being associated with the second brushwheel, is formed substantially on said second side between the second auxiliary brushwheel and a second of said main wheels; wherein said robot is configured to rotate the first auxiliary brushwheel such that the direction of movement of a portion thereof contacting the surface is toward said first inlet, and to rotate the second auxiliary brushwheel such that the direction of movement of a portion thereof contacting the surface is toward said second inlet.