Patent ID: 8561240

Claim:
A submersible pool cleaning vehicle, the vehicle including a housing and the housing having drive members for moving the vehicle around the pool surface, the vehicle comprising: an endless loop track, the track having an exterior and an interior, the interior having a series of ribs, the ribs having a predetermined width and pitch; a combination of drive members and associated members having at least one drive member for moving the vehicle around the pool surface, the drive members and associated members for moving the vehicle have an exterior surface with a series of grooves and ridges for compatible connection with the ribs, the grooves having a predetermined width and the width of the ribs being substantially narrower than the width of the grooves; and the track overlapping the drive members and associated members for moving the vehicle such that the grooves and track ribs engaging in a loose fit relationship defining a mismatch fit, whereby the track fits loosely in the drive members and associated members for moving the vehicle.