Fuel injector

Claim 1

A FUEL INJECTOR COMPRISING AN OPEN ENDED TUBE HAVING A CONTINUOUS SIDE WALL, A BUTTERFLY VALVE SHAFT JOURNALLED THROUGH SAID WALL AT ONE SIDE OF THE TUBE AND HAVING A BUTTERFLY VALVE EXTENDING ACROSS THE INTERIOR THE TUBE, SAID VALVE SHAFT HAVING THROTTLE ACCOMMODATING LEVER MEANS ON ITS OUTER END, AND ADJUSTABLE IDLE STOP MEANS ENGAGEABLE WITH A PAIR OF SAID TUBE, SAID VALVE SHAFT HAVING A FIRST LONGITUDINAL BRE OPENING TO ITS OUTER END AND A SECOND LONGITUDINAL BORE OPENING TO ITS INNER END, THE PART OF THE VALVE SHAFT BETWEEN THESE BORES BEING SOLD AND FORMED WITH A REDUCED DIAMETER IDLER FUEL PASSAGE COMMUNICATING WITH THE BORES, SAID PART HAVING A NEEDLE VALVE SEAT AT ITS OUTER END, A NEEDLE VALVE THREADED IN SAID FIRST BORE AND HAVING A POINT COOPERATING WITH SAID VALVE SEAT, AN ENLARGED DIAMETER HEAD ON THE INNER END OF THE VALVE SHAFT, A LATERAL TUBULAR BOSS ON THE SIDE OF THE TUBE REMOTE FROM THE VALVE SHAFT, SAID BOSS HAVING A BORE LARGER IN DIAMETER THAN SAID VALVE SHAFT IN WHICH SAID HEAD IS JOURNALLED, SAID HEAD BEING FORMED IN THE END THEREOF REMOTE FROM THE VALVE SHAFT WITH A FRUSTOCONICAL RECESS AND WITH AN ANNULAR IDLER FUEL RECESS SURROUNDING AND COMMUNICATING WITH THE SMALLER END OF THE FRUSTO-CONICAL RECESS, A FUEL METERING ROTOR SLIDABLY AND ROTATABLY JOURNALLED IN THE BORE OF THE BOSS AND HAVING A FRUSTO-CONICAL INNER END ROTATABLY AND CONFORMABLY ENGAGED IN SAID FRUSTO-CONICAL RECESS, SAID ROTOR HAVING A REDUCED DIAMETER AXIAL SOLID BOSS ON ITS INNER END, SAID SOLID BOSS BEING JOURNALLED IN THE SECOND BORE OF THE VALVE SHAFT AND BEING CIRCUMFERENTIALLY SPACED FROM THE SIDE OF SAID ANNULAR IDLER FUEL RECESS, PASSAGE MEANS PROVIDING COMMUNICATION BETWEEN SAID SECOND VALVE SHAFT BORE AND SAID IDLER FUEL RECESS, A SNAP RING FIXED IN THE BORE OF THE TUBULAR BOSS, A COIL SPRING CIRCUMPOSED ON THE ROTOR AND COMPRESSED BETWEEN THE RING AND A PART OF THE ROTOR AND MAINTAINING ENGAGEMENT OF THE FRUSTO-CONICAL END OF THE ROTOR IN SAID FRUSTO-CONICAL RECESS, A REDUCED DIAMETER

Claim 3

A DEVICE OF THE CHARACTER DESCRIBED, COMPRISING AN OPEN-ENDED TUBE HAVING A SIDE WALL, A BUTTERFLY A VALVE SHAFT JOURNALLED ACROSS THE TUBE, A BUTTERFLY VALVE FIXED ON THE BUTTERFLY SHAFT, SAID VALVE HAVING A PERIPHERAL EDGE WORKING CLOSE TO THE WALL OF THE TUBE, SAID TUBE BEING FORMED WITH A PAIR OF INTERNAL CIRCUMFERENTIALLY EXTENDING AIR IDLER GROOVES, SAID GROOVES BEING DISPOSED SUBSTANTIALLY IN A PLANE POSITIONED AT RIGHT ANGLES TO THE AXIS OF THE TUBE, MEANS FOR POSITIONING THE BUTTERFLY VALVE IN A SUBNORMAL IDLE POSITION, IN WHICH IT COVERS ONE OF SAID GROOVES AND UNCOVERS THE OTHER, MEANS FOR ROTATING THE VALVE FROM SAID SUBNORMAL POSITION TO AND THROUGH A CONVENTIONAL IDLE POSITION IN WHICH IT UNCOVERS THE SAID ONE GROOVE AND COVERS THE OTHER, SAID VALVE SHAFT HAVING A MAIN FUEL PASSAGE AND AN IDLER FUEL PASSAGE, AND A FUEL METERING ROTOR ROTATABLY MOUNTED WITH RESPECT TO THE SHAFT AND HAVING A FUEL FEED PASSAGE REGISTRABLE WITH SAID MAIN AND IDLER FUEL PASSAGE AT RELATIVELY DIFFERENT ANGULAR POSITIONS OF THE ROTOR AND SHAFT BUT SO POSITIONED AS TO REGISTER ONLY WITH SAID IDLER FUEL PASSAGE DURING THE ENTIRE ARC OF ROTATION OF THE BUTTERFLY VALVE EXTENDING BETWEEN SAID SUBNORMAL AND CONVENTIONAL IDLE POSITIONS, SAID GROOVES SERVING TO PROVIDE CONSTANT AIR FLOW AROUND THE EDGE THE BUTTERFLY VALVE AS THE BUTTERFLY VALVE IS ROTATED FROM ITS SUBNORMAL IDLE POSITION TO ITS CONVENTIONAL IDLE POSITION.

Claim 4

A DEVICE OF THE CHARACTER DESCRIBED, COMPRISING AN OPEN-ENDED TUBE HAVING A SIDE WALL, A BUTTERFLY A VALVE SHAFT JOURNALLED ACROSS THE TUBE, A BUTTERFLY VALVE FIXED ON THE BUTTERFLY SHAFT, SAID VALVE HAVING A PERIPHERAL EDGE WORKING CLOSE TO THE WALL OF THE TUBE, SAID TUBE BEING FORMED WITH A PAIR OF INTERNAL CIRCUMFERENTIALLY EXTENDING AIR IDLER GROOVES, SAID GROOVES BEING DISPOSED SUBSTANTIALLY IN A PLANE POSITIONED AT RIGHT ANGLES TO THE AXIS OF THE TUBE, MEANS FOR POSITIONING THE BUTTERFLY VALVE IN A SUBNORMAL IDLE POSITION, IN WHICH IT COVERS ONE OF SAID GROOVES AND UNCOVERS THE OTHER, MEANS FOR ROTATING THE VALVE FROM SAID SUBNORMAL POSITION TO AND THROUGH A CONVENTIONAL IDLE POSITION IN WHICH IT UNCOVERS THE SAID ONE GROOVE AND COVERS THE OTHER, SAID VALVE SHAFT HAVING A MAIN FUEL PASSAGE AND AN IDLER FUEL PASSAGE, AND A FUEL METERING ROTOR ROTATABLY MOUNTED WITH RESPECT TO THE SHAFT AND HAVING A FUEL FEED PASSAGE REGISTRABLE WITH SAID MAIN AND IDLER FUEL PASSAGE AT RELATIVELY DIFFERENT ANGULAR POSITIONS OF THE ROTOR AND SHAFT BUT SO POSITIONED AS TO REGISTER ONLY WITH SAID IDLER FUEL PASSAGE DURING THE ENTIRE ARC OF ROTATION OF THE BUTTERFLY VALVE EXTENDING BETWEEN SAID SUBNORMAL AND CONVENTIONAL IDLE POSITIONS, SAID GROOVES SERVING TO PROVIDE CONSTANT AIR FLOW AROUND THE EDGE THE BUTTERFLY VALVE AS THE BUTTERFLY VALVE IS ROTATED FROM ITS SUBNORMAL IDLE POSITION TO ITS CONVENTIONAL IDLE POSITION.