Baverstock

Claim 1

IN AN AIR-FUEL MIXER DEVICE, THE COMBINATION OF: A HOUSING HAVING AN AIR INLET AND HAVING AN ANNULAR WALL DEFINING A DISCHARGE PASSAGE CENTRALLY THEREIN, SAID ANNULAR WALL HAVING A SEAT OF ONE END THEREOF, AN AIR VALVE MEMBER MOUNTED FOR AXIAL MOVEMENT IN THE HOUSING TOWARD AND AWAY FROM THE AIR VALVE MEMBER AND MOVABLE AS A UNIT THEREWITH, A FUEL SUPPLY CONDUIT TERMINATING IN A CENTRAL STATIONARY TUBULAR PART HAVING AN AXIAL OPENING, SAID AXIAL OPENING CO-OPERATING WITH SAID FUEL VALVE ELEMENT TO CONTROL FLOW OF FUEL INTO SAID DISCHARGE PASSAGE, AN ANNULAR RING MOUNTED CONCENTRALLY ON SAID AIR VALVE MEMBER FOR LIMITED AXIAL MOVEMENT WITH RESPECT THERETO AND ENGAGEABLE WITH SAID ANNULAR SEAT, A BACKING PLATE FIXED ON SAID AIR VALVE MEMBER AND SPACED AXIALLY WITH RESPECT TO SAID RING, A FLEXIBLE DIAPHRAGM SECURED TO THE HOUSING ON ITS PERIPHERY AND HAVING A CENTRAL PORTION LOOSELY RECEIVED IN THE SPACE BETWEEN SAID RING AND SAID BACKING PLATE FOR RADICAL SELF-ALIGNING MOVEMENT, AND MEANS SUBJECTING SAID DIAPHRAGM ON ONE FACE TO AIR PRESSURE IS SAID INLET AND ON THE OTHER FACE TO PRESSURE IN THE DISCHARGE PASSAGE.