Tank cleaning method and apparatus

Claim 1

A METHOD FOR THE CLEANING OF TANKS CARRIED ON A TRUCK TRAILER AND EMPLOYED FOR THE TRANSPORTATION OF CHEMICALS WHICH LEAVE A RESIDUE REMAINING IN THE TANK AFTER THE TRANK IS SUBSTANTIALLY COMPLETELY EMPTIED, COMPRISING THE STEPS OF INCLUDING A SPRAY HEAD IN SAID TANK AT A POINT NEAR THE TOP WALL THEREOF IMMEDIATELY AFTER REMOVAL OF THE CHEMICALS FROM THE TANK, INTRODUCING INTO SAID SPRAY HEAD UNDER HIGH PRESSURE A CLEANING FLUID CAPAABLE OF DISSOLVING THE CHEMICAL RESIDUE IN THE TANK, SIMULTANEOUSLY INTRODUCING INTO SAID SPRAY HEAD A GAS UNDER HIGH PRESSURE WHEREBY SAID FLUID AND SAID GAS WILL COMMINGLE IN SAID SPRAY HEAD AND FORM A MIST FOR DISTRIBUTION THROUGHOUT SAID TANK, AND INCLUDING THE STEPS OF CONNECTING THE HIGH PRESSURE AIR FROM THE PNEUMATIC BRAKE SYSTEM OF SAID TANK TRAILER TO A SUPPLY OF SAID FLUID TO PROVIDE FOR THE HIGH PRESSURE INTRODUCTION OF SAID FLUID, AND CONNECTING SAID HIGH PRESSURE AIR TO SAID SPRAY HEAD TO PROVIDE FOR THE INTRODUCTION OF SAID GAS.