Fuel injection nozzle and adjusting means therefor

Claim 1

IN A FUEL INJECTION DEVICE, A NOZZLE BODY HAVING A VALVE CHAMBER, A PLUNGER VALVE OF SMALLER CROSS SECTION THAN SAID CHAMBER DISPOSED IN THE CHAMBER, A GUIDE SUPPORTING THE PLUNGER VALVE FOR RECIPROCATING MOVEMENT LONGITUDINALLY WITHIN THE CHAMBER, A SPRING BIASING THE PLUNGER VALVE TOWARD A VALVE SEAT HAVING A DISCHARGE ORIFICE AND ADJUSTING AND LOCKING MEANS FOR SETTING THE SPRING BIASING FORCE AND THE LIFT OF THE VALVE FROM THE VALVE SEAT, SAID ADJUSTING AND LOCKING MEANS COMPRISING AN EXTERNALLY AND INTERNALLY THREADED SPRING ADJUSTING SLEEVE THREADABLY ENGAGING MATING THREADS PROVIDED BY THE NOZZLE BODY, A CONCENTRIC LIFT STOP PIN THREADABLY ENGAGED WITH THE INNER THREADS OF SAID SLEEVE, AND A LOCK NUT THREADABLY ENGAGED WITH THE OUTER THREADS OF SAID SLEEVE AND ENGAGEABLE WITH A SHOULDER PROVIDED BY SAID NOZZLE BODY WHEREIN THE IMPROVEMENT COMPRISES A LONGITUDINAL PORTION OF THE SPRING ADJUSTING SLEEVE SPANNING SAID SHOULDER PROVIDED BY THE NOZZLE BODY BEING EXTERNALLY UNTHREADED TO PERMT ELONGATION AND A GRADUAL CHANGE IN PITCH OF THE INTERNAL THREADS UPON THE TIGHTENING OF THE LOCK NUT SO AS TO LOCK THE STOP PIN IN POSITION.