Sequential irrigation valve

Claim 1

A FLUID PRESSURE OPERATED SEQUENCE IRRIGATION VALVE COMPRISING A HOUSING HAVING A CONDUIT INLET PORT, A CONDUIT OUTLET PORT AND A SPRINKLER OUTLET PORT BELOW SAID CONDUIT PORTS, A VALVE BALL FREELY MOVABLE IN SAID HOUSING FOR ALTERNATIVELY CLOSING ONE OF SAID OUTLET PORTS UNDER FORCE OF WATER PRESSURE IN THE HOUSING WHILE SIMULTANEOUSLY OPENING THE OTHER OUTLET PORT, AND WATER PRESSURE RESPONSIVE VALVE ACTUATING MEANS IN SAID HOUSING; SAID ACTUATING MEANS INCLUDING A HYDRAULIC CHAMBER HAVING A MOVABLE UPPER WALL, A STOOL PROJECTING UPWARDLY FROM THE UPPER WALL OF SAID CHAMBER FOR SUPPORTING SAID VALVE BALL, AND RESILIENT MEANS ASSOCIATED WITH SAID CHAMBER FOR EXTENDING SAID STOOL AND LIFTING SAID VALVE BALL INTO POSITION OPPOSITE SAID CONDUIT OUTLET PORT, SAID VALVE ACTUATING MEANS BEING COCKED UPON APPLICATION OF WATER UNDER PRESSURE TO SAID VALVE TO MOVE SAID CHAMBER WALL AGAINST THE FORCE OF SAID RESILIENT MEANS AND LOWER SAID STOOL TO A POSITION BELOW SAID SPRINKLER OUTLET PORT WHILE THE WATER UNDER PRESSURE IN SAID HOUSING MAINTAINS SAID VALVE BALL SEALED AGAINST SAID CONDUIT OUTLET PORT, TEMPORARY REDUCTION OF WATER PRESSURE IN SAID HOUSING RELEASING SAID VALVE BALL FROM ITS POSITION AT SAID CONDUIT OUTLET PORT WHEREUPON SAID VALVE BALL DROPS BY GRAVITY BACK ONTO SAID STOOL AND IN FRONT OF SAID SPRINKLER OUTLET PORT, RESUMPTION OF FULL WATER PRESSURE IN SAID HOUSING SEALING SAID VALVE BALL AGAINST SAID SPRINKLER OUTLET PORT WHILE WATER FLOWS WITHOUT OBSTRUCTION THROUGH SAID CONDUIT PORTS FOR ENTERING THE NEXT SEQUENCE VALVE.