Fuel oil injector with a floating ball as its valve unit

A fuel injector for a gasoline engine comprising:

• a magnetic housing having a leading end, a rear end, a central hole connecting said leading and rear ends and a shoulder portion disposed within said central hole between said leading and rear ends, wherein said housing is made of a soft magnetic material and said rear end is in communication with a pressurized fuel supply;
• a magnetic coil assembly disposed within said magnetic housing central hole at the rear end of said housing, wherein said magnetic coil includes a central hole disposed coaxially with the magnetic housing central hole;
• a magnetic stator assembly disposed within the central hole of said coil assembly;
• a valve seat member having a hollow formed in a concave rear face and having an oblique cone leading to an injection nozzle disposed at a centermost portion thereof, disposed within the housing central hole at the leading end of said housing;
• screw block means for securing said valve seat member rear face tightly against said shoulder portion of said housing;
• a ball valve assembly disposed within said hollow formed in said valve seat member and having a semi-circular ball at a leading end and a flat armature at a rear end;
• a nonmagnetic plate interposed between said housing shoulder portion and said valve seat member;
• and
• spring means biasing said ball valve assembly against said valve seat member whereby said semi-circular ball normally seats against said valve seat member oblique cone in a closed condition;
• wherein said ball valve assembly is moveable to an open position in response to energization of said magnetic coil assembly whereby said pressurized fuel flows from said housing rear end, past said ball valve assembly, through said valve seat member oblique cone and through said injection nozzle.