Self-cleaning rotary valve for controlling flow of aerosols

Claim 1

APPARATUS FOR CONTROLLING THE FLOW OF HOT GASES AND AEROSOLS COMPRISING A CONDUIT, A SUBSTANTIALLY CYLINDRICAL, CONTINUOUS METAL BODY CONCENTRICALLY POSITIONED WITHIN SAID CONDUIT SO AS TO FORM A CHAMBER BETWEEN SAID CONDUIT AND SAID BODY, MEANS FOR CONCENTRICALLY POSITIONING SAID BODY IN SAID CONDUIT, MEANS FOR FORMING A GAS TIGHT SEAL BETWEEN SAID CONDUIT AND SAID BODY, MEANS FOR ADMITTING A GAS INTO SAID CHAMBER AND RELEASING SAID GAS THEREFROM, A ROTATABLE SHAFT EXTENDING TRANSVERSELY THROUGH SAID BODY SO THAT THE AXIS OF SAID SHAFT INTERSECTS THE HORIZONTAL AXIS OF THAT SAID BODY AT AN ANGLE BETWEEN 30* AND 60* BUT SO THAT SAID SHAFT DOES NOT PASS THROUGH SAID CHAMBER, A CIRCULAR METAL VANE OF SUBSTANTIALLY THE DIAMETER AS THE INSIDE OF SAID BODY, SAID VANE BEING ATTACHED SECURELY TO SHAFT AND MOUNTED THEREON IN SUCH A MANNER THAT THE CENTER OF SAID VANE COINCIDES WITH THE POINT OF INTERSECTION OF THE AXIS OF SAID SHAFT AND THE AXIS OF SAID BODY AND SO THAT AT SOME POINT DURING THE ROTATION OF SAID SHAFT, ALL OF THE RADII OF SAID VANE ARE AT RIGHT ANGLES TO THE AXIS OF SAID BODY, MEANS FOR ROTATING SAID SHAFT, AND MEANS FOR MAINTAINING A GAS TIGHT SEAL ABOUT SAID SHAFT AT THE POINTS WHERE IT EXTENDS THROUGH SAID CONDUIT.