Fuel injector devices and systems

Claim 1

A LOW PRESSURE CONTINUOUS FUEL INJECTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE HAVING AN INLET MANIFOLD STRUCTURE SUBJECT TO SUB-ATMOSPHERIC PRESSURES, INCLUDING A PLURALITY OF INJECTOR DEVICES, EACH SAID INJECTOR DEVICE INCLUDING A BODY PORTION, AN AIR CHAMBER DEFINED IN SAID BODY PORTON, AN AIR INLET IN SAID BODY PORTON COMMUNICATION WITH SAID AIR CHAMBER, AN AIR TUBE PROJECTING FROM SAID BODY PORTION AND AT THE PROXIMAL END THEREOF COMMUNICATION WITH SAID AIR CHAMBER, THE DISTAL END OF SAID AIR TUBE HAVING AN OPEN, AXIALLY DIRECTED OUTLET ORIFICE, A FUEL TUBE EXTENDING FROM SAID BODY PORTION INTO AND ALONG SAID AIR TUBE IN SPACED RELATION THEREWITH, THE DISTAL END OF SAID FUEL TUBE TERMINATING SHORT OF SAID OUTLET ORIFICE AND DEFINING A FUEL OUTLET ALIGNED WITH SAID OUTLET ORIFICE, AND A FUEL INLET IN SAID BODY PORTION COMMUNICATING WITH SAID FUEL TUBE, AND IN WHICH SAID OUTLET ORIFICES OF SAID INJECTOR DEVICES ARE DISPOSED IN SAID MANIFOLD STRUCTURE SO THAT INTERIORS OF THE AIR TUBES OF SAID INJECTOR DEVICES ARE EXPOSED TO PRESSURE CONDITIONS IN SAID MANIFOLD STRUCTURE, MEANS FOR METERING LIQUID FUEL TO THE FUEL INLETS OF SAID INJECTOR DEVICES AND MEANS FOR SUPPLYING ATOMIZING AIR TO THE AIR INLETS OF SAID INJECTOR DEVICES TO ATOMIZE THE LIQUID FUEL SUPPLIED THERETO AND DISCHARGE THE ATOMIZED FUEL THROUGH SAID OUTLET ORIFICES AT SUBSTANTIALLY ATOMIZING AIR PRESSURE, AND VACUUM RELIEF VALVE MEANS CONNECTED TO THE AIR INLETS OF SAID INJECTOR DEVICES FOR ENSURING THAT SUB-ATMOSPHERIC PRESSURES IN SAID MANIFOLD STRUCTURE DO NOT RESULT IN SUB-ATMOSPHERIC PRESSURES IN THE AIR TUBES OF SAID INJECTOR DEVICES.