Spray gun for two-component paints, with separate concentrical nozzles

Claim 1

A SPRAY GUN FOR TWO-COMPONENT PAINTS OR THE LIKE, COMPRISING, A BODY MEMBER HAVING A PLURALITY OF CONCENTRICAL NOZZLES AT ONE END THEREOF, SAID BODY MEMBER HAVING FIRST, SECOND AND THIRD HOLLOW CHAMBERS THEREIN, SAID FIRST AND SECOND CHAMBERS HAVING CONDUIT ENTRANCE MEANS FOR THE FLOW OF AIR THEREIN, SAID BODY MEMBER INCLUDING FIRST DUCT MEANS COMMUNICATING WITH SAID FIRST CHAMBER AND AN OUTER ONE OF SAID PLURALITY OF CONCENTRICAL NOZZLES WHEN SAID SPRAY GUN IS BEING OPERATED, AND SECOND DUCT MEANS COMMUNICATING WITH SAID SECOND CHAMBER AND AN INNER ONE OF SAID CONCENTRICAL NOZZLES WHEN SAID SPRAY GUN IS INOPERATIVE, SAID THIRD CHAMBER HAVING CONDUIT ENTRANCE MEANS FOR THE FLOW OF A FIRST LIQUID THEREIN, SAID THIRD CHAMBER COMMUNICATING WITH AN INTERMEDIATE ONE OF SAID CONCENTRICAL NOZZLES WHEN SAID SPRAY GUN IS BEING OPERATED; SAID BODY MEMBER INCLUDING THIRD DUC MEANS COMMUNICATING WITH A SOURCE OF A SECOND LIQUID AND SAID INNER ONE OF SAID CONCENTRICAL NOZZLES WHEN SAID SPRAY GUN IS BEING OPERATED; AND PISTON MEANS LOCATED IN SAID FIRST CHAMBER AND NORMALLY BIASED TOWARD A FIRST POSITION IN SAID BODY MEMBER FOR BLOCKING SAID FIRST AND THIRD DUCT MEANS, OPENING SAID SECOND DUCT MEANS, AND ISOLATING SAID THIRD CHAMBER FROM SAID INTERMEDIATE NOZZLE; THE INTRODUCTION OF A PREDETERMINED PRESSURE OF COMPRESSED AIR INTO SAID FIRST CHAMBER BEING SUFFICIENT TO MOVE SAID PISTON MEANS TO A SECOND POSITION TO OPEN SAID FIRST AND THIRD DUCT MEANS, CLOSE SAID SECOND DUCTMEANS, AND REESTABLISH COMMUNICATION OF SAID INTERMEDIATE NOZZLE AND SAID FIRST CHAMBER.