Constant pressure variable demand hydraulic system

Claim 1

A CONSTANT PRESSURE, VARIABLE DEMAND HYDRAULIC SYSTEM COMPRISING A SOURCE OF FLUID UNDER PRESSURE, A HEADER CONNECTED WITH SAID SOURCE, A PLURALITY OF FLUID SPRAY SYSTEMS CONNECTED WITH AND DRAWING FLUID FROM SAID HEADER, EACH OF SAID FLUID SPRAY SYSTEMS INCLUDING A CONSTANT-FLOW, TWO-POSITION FLUID VALVE HAVING AN INLET PORT AND FIRST AND SECOND OUTLET PORTS CONNECTED AT ITS INLET PORT WITH SAID HEADER, SAID VALVE BEING ADAPTED TO BE SHIFTED BETWEEN ONE POSITION WHEREIN SAID FIRST OUTLET PORT IS OPEN AND SAID SECOND OUTLET PORT IS CLOSED AND ANOTHER POSITION WHEREIN SAID SECOND OUTLET PORT IS OPEN AND SAID FIRST OUTLET PORT IS CLOSED WITHOUT DIMINISHING THE FLOW OF FLUID THROUGH SAID VALVE, A FIRST FLUID CONDUIT CONNECTED BY ONE END WITH SAID FIRST OUTLET PORT AND BY ITS OTHER END WITH A FLUID DISPOSAL MEANS, PRESSURE-REDUCING MEANS IN SAID FIRST CONDUIT ADJACENT SAID ONE END THEREOF FOR REDUCING THE PRESSURE OF FLUID FLOWING INTO SAID CONDUIT FROM SAID FIRST OUTLET, A SECOND CONDUIT CONNECTED BY ONE END WITH SAID SECOND FLUID PORT, FLUID SPRAY NOZZLE MEANS CONNECTED WITH THE OTHER END OF SAID SECOND CONDUIT, A THIRD CONDUIT EXTENDING BETWEEN SAID FIRST CONDUIT AND SAID SECOND CONDUIT FOR CONDUCTING FLUID UNDER REDUCED PRESSURE TO SAID NOZZLE MEANS FROM SAID FIRST CONDUIT WHEN SAID FIRST OUTLET PORT IS OPEN, A FIRST CHECK VALVE IN SAID THIRD CONDUIT RESTRICTING THE FLOW OF FLUID THERETHROUGH TO THE DIRECTION TOWARD SAID SECOND CODUIT, AND A SECOND CHECK VALVE IN SAID FIRST CONDUIT RESTRICTING THE FLOW OF FLUID THERETHROUGH TO THE DIRECTION TOWARD SAID FLUID DISPOSAL MEANS.