Swimming pool cleaning system

Claim 1

AN AUTOMATIC CLEANING SYSTEM FOR A SWIMING POOL HAVING A FILTER, A POWER-DRIVEN PUMP, AND PIPE MEANS FOR CIRCULATION OF WATER FROM THE POOL THROUGH THE PUMP AND FILTER WITH RETURN TO THE POOL, SAID SYSTEM COMPRISING IN COMBINATION A THIN-WALL FLEXIBLE MAIN TUBE ANCHORED AT ONE END WITH A PREDOMINANT PORTION OF ITS LENGTH EXTENDING ALONG THE POOL FLOOR, AT LEAST ONE THIN-WALL FLEXIBLE BRANCH TUBE BRANCHING AT A SMALLL ACUTE ANGLE FROM SAID PORTION OF THE MAIN TUBE WITH ESSENTIALLY ITS ENTIRE LENGTH EXTENDING ALONG THE POOL FLOOR, THE VERTEX OF THE ACUTE ANGLE BEING DIRECTED TOWARD THE ANCHORED END OF THE MAIN TUBE, AXIALLY DIRECTED FIRST NOZZLE MEANS AT THE FREE ENDS OF THE BRANCH TUBE AND OF THE MAIN TUBE, SECOND NOZZLE MEANS OPENING OUTWARD FROM THE MAIN TUBE INTERMEDIATE ITS LENGTH AND DIRECTED LONGITUDINALLY THEREOF AND AWAY FROM THE ANCHORED END, AND CONDUIT MEANS FOR SUPPLYING WATER UNDER PEESSURE FROM THE PUMP TO THE INTERIOR OF THE MAIN TUBE TO CAUSE WATER JET EMISSION FROM SAID FIRST AND SECOND NOZZLE MEANS, REACTION THRUST FROM SUCH JET EMISION EXERTING LONGITUDINAL FORCES ON THE TUBES TO CAUSE ALL SAID TUBES TO MOVE SINUOUSLY IN AN EFFECTIVELY RANDOM MANNER OVER THE POOL FLOOR.