Sprayer system

Claim 1

AN AGRICULTURAL SPRAY APPARATUS COMPRISING A FLUID RESERVOIR HAVING SEPARATE INLET AND OUTLET OPENINGS, A PUMP CONNECTED IN FLUID RECEIVING RELATION WITH SAID RESERVOIR OUTLET OPENING AND HAVING A FLUID DELIVERY PASSAGE; A NOZZLE HEAD; AND FLUID DISTRIBUTING MEANS SELECTIVELY OPERABLE TO DIRECT THE FLUID DISCHARGE OF SAID PUMP EITHER PARTLY TO SAID NOZZLE HEAD AND PARTLY TO SAID RESERVOIR INLET OPENING, OR IN ITS ENTIRETY TO SAID RESERVOIR INLET; SAID FLUID DISTRIBUTING MEANS COMPRISING A SHUTOFF VALVE HAVING ENTRANCE, SPRAY AND EXIT PASSAGES IN FLUID COMMUNICATING RELATION, RESPECTIVELY, WITH SAID PUMP DELIVERY PASSAGE, NOZZLE HEAD, AND RESERVOIR INLET, AND AN ADJUSTABLE VALVE CORE OPERATIVELY ASSOCIATED WITH SAID ENTRANCE, SPRAY AND EXIT PASSAGES SO THAT UPON ADJUSTMENT OF SAID VALVE CORE TO A FIRST POSITION SAID ENTRANCE PASSAGE IS CONNECTED WITH SAID SPRAY PASSAGE AND DISCONNECTED FROM SAID EXIT PASSAGE, AND SO THAT UPON ADJUSTMENT OF SAID VALVE CORE TO A SECOND POSITION SAID ENTRANCE PASSAGE IS CONNECTED WITH SAID EXIT PASSAGE AND DISCONNECTED FROM SAID SPRAY PASSAGE; AND A RELIEF VALVE OPERATIVELY CONNECTED IN FLUID RECEIVING RELATION WITH SAID PUMP DELIVERY PASSAGE AND IN FLUID DELIVERING RELATION WITH SAID RESERVOIR INLET OPENING, SAID RELIEF VALVE BEING OPERATIVE TO YIELD TO NORMAL OPERATING PRESSURE OF SPRAYING FLUID DELIVERED TO SAID NOZZLE HEAD WHILE SAID VALVE CORE IS IN SAID FIRST POSITION.