Patent ID: 7849547

Claim:
A self-propelled robotic pool cleaner comprising: a. a pool cleaner housing having a first and second pair of dual brushes co-axially mounted at opposite ends of the housing for rotation on axles that are transverse to the direction of movement, the first pair of brushes being mounted on one side and the second pair of brushes mounted on the opposite side of the cleaner, the pool cleaner being propelled by the rotation of the brushes; b. a single reversible drive motor operatively connected for synchronously driving the first pair of brushes; c. a controller for controlling the direction of rotation of the single drive motor and thereby the directional movement of the pool cleaner; and d. a rotational delay clutch assembly that is co-axially positioned between each pair of the first and second brushes, whereby a reversal in the direction of rotation of the first pair of motor-driven brushes temporarily disengages the clutch from driving the second pair of brushes thereby pivoting the pool cleaner through a predetermined angular change in direction before the clutch reengages with the second pair of brushes thereby initiating the synchronous rotation of the second pair of brushes, whereby the pool cleaner moves in a direction along a generally straight path that is angularly displaced from the direction prior to the reversal.