Furnace repair gun

Claim 1

A FURNANCE REPAIR GUN COMPRISING, IN COMBINATION, A DRY REFRACTORY MATERIAL CONTAINING TANK, A MIXING DISCHARGE NOZZLE, MEANS FOR AIR-PRESSURIZING THE TANK, A WATER CONDUIT LEADING TO THE MIXING DISCHARGE NOZZLE AND EQUIPPED WITH A WATER FLOW CONTROL VALVE TO CONTROL THE VOLUME OF WATER DISCHARGED INTO THE NOZZLE, A MATERIAL CONDUIT LEADING FROM THE MATERIAL CONTAINING TANK TO THE MIXING DISCHARGE NOZZLE, A MATERIAL FLOW CONTROL VALVE FOR FEEDING THE AIR-BORNE DRY MATERIAL FROM THE MATERIAL CONTAINING TANK TO THE MATERIAL CONDUIT, AN AIR PRESSURE PIPE EQUIPPED WITH A FIRST AIR JET LOCATED ABOVE THE MATERIAL FLOW CONTROL VALVE TO DIRECT AN AIR STREAM UNDER SUPER-ATMOSPHERIC PRESSURE DOWNWARDLY THROUGH THE OPENING OF SAID CONTROL VALVE WHEN THE LATTER IS OPEN TO AID IN PROPELLING THE AIR-BORNE MATERIAL THERETHROUGH, MEANS FOR CONSTANTLY MAINTAINING THE AIR DISCHARGED FROM THE FIRST JET AT A PRESET FIXED PRESSURE TO CAUSE THE AIRBORNE MATERIAL PASSING THROUGH THE MATERIAL CONTROL VALVE TO BE DISCHARGED THEREFROM AT A CONTINUOUSLY CONTROLLED RATE, A FURTHER AIR PRESSURE PIPE EQUIPPED WITH A SECOND AIR JET LOCATED BELOW THE MATERIAL FLOW CONTROL VALVE AND ARRANGED TO DISCHARGE AN AIR STREAM UNDER SUPER-ATMOSPHERIC PRESSURE INTO THE AIR-BORNE MATERIAL AS IT IS FED FROM THE MATERIAL CONTAINING TANK INTO THE MATERIAL CONDUIT, AND MEANS FOR CONSTANTLY MAINTAINING THE AIR DISCHARGED FROM THE SECOND AIR JET AT A PRESET FIXED PRESSURE WHICH IS SLIGHTLY HIGHER THAN THE PRESET FIXED PRESSURE OF THE FIRST AIR JET TO CAUSE THE AIR-BORNE MATERIAL TO BE TRANSPORTED THROUGH THE CONDUIT TO THE MIXING DISCHARGE NOZZLE AT A CONTINUOUSLY CONTROLLED RATE FOR INTIMATE AND THOROUGH MIXING WITH WATER IN SAID NOZZLE TO PRODUCE A SPRAYABLE WET SLURRY, THE PRESET FIXED AIR PRESSURES FOR THE TWO AIR JETS BEING SO REGULATED AND CONTROLLED AS TO INSURE A CONTINUOUS EVEN FLOW OF THE AIRBORNE MATERIAL FROM THE MATERIAL CONTAINING TANK TO THE MIXING DISCHARGE NOZZLE AS WELL AS A CONTINUOUS EVEN FLOW OF THE WET SLURRY THROUGH AND FROM THE MIXING DISCHARGE NOZZLE.