Foam spray system

Claim 1

APPARATUS FOR MIXING TWO LIQUID COMPONENTS IN A FIXED VOLUME RATIO, SAID APPARATUS COMPRISING A COMPRESSED AIR SOURCE; SEPERATE CONTAINERS FOR EACH OF SAID LIQUID COMPONENTS; CONDUIT MEANS FOR SUPPLYING THE COMPRESSES AIR TO EACH OF SAID CONTAINERS TO PRESSURIZE THE CONTENTS THEREOF; A CONSTAN VOLUME RATIO METERING DEVICE INCLUDING TWO IDENTICAL DISPLACEMENT GEAR-TYPE HYDRAULIC MOTORS, SAID MOTORS HAVING INTERCHANGEABLE PARTS INCLUDING A HOUSING ASSEMBLED FROM A PAIR OF END PLATES, A HOLLOW INTERMEDIATE PERIPHERAL ELEMENT, A PAIR OF ROTATBLE SHAFTS MOUNTED AT THE ENDS THEREOF IN SAID END PLATES. A PAIR OF IDENTICAL MESHING GEARS, EACH OF SAID GEARS BEING FIXEDLY SECURED TO ONE OF SAID SHAFTS WITHIN SAID HOLLOW INTERMEDIATE ELEMENT, ONE OF SAID SHAFTS EXTENDING BEYOND ONE OF SAID END PLATED, A SEPARATE PLATE HAVING AN OPENING THEREING MOUNTED BETWEEN SAID PLATES HAVING SAID SHAFTS EXTENDING THEREFROM, SAID END PLATES AND SAID INTERMEDIATE PLATE FORMING A CLOSED CHAMBER, A TEAR MOUNTED ON EACH OF SAID EXTENDING SHAFTS IN SAID CLOSED CHAMBER, SAID GEARS BEING MESHED TO MAINTAIN A CONSTANT SPEED RATIO BETWEEN SAID MOTORS; FASTENING MEANS ASSOCIATED WITH SAID INTERMEDIATE PLATE AND SAID ADJOINING END PLATES FOR PIVOTALLY MOUNTING SAID HOUSING RELATIVE TO ONE ANOTHER IN ORDER TO VARY THE DISTANCE BETWEEN SAID EXTEDNDING SHAFTS TO ACCOMMODATE DIFFERENT SIZES OF SAID LATTER MENTIONED MESHING GEARS; CONDUIT MEANS FOR DELIVERING THE CONTENTS OF EACH OF SAID CONTAINERS TO ONE OF SAID HOUSINGS; A MIXING CHAMBER FOR SAID LIQUID COMPONENTS; CONDUIT MEANS FOR DELIVERING THE COMPONENTS PASSING THROUGH EACH OF SAID MOTORS TO SAID MIXING CHAMBER; AND AN ADDITIONAL CONDUIT COMMUNICATING BETWEEN SAID COMPRESSED AIR SOURCE AND SAID MIXING CHAMBER.