Fuel rail assembly providing connection to a fuel injector

A fuel system for supplying fuel to a fuel consuming device, said fuel system comprising:

• a fuel injector having a fuel injector inlet conduit, a nozzle opening, and a valve needle which is moveable to selectively permit and prevent flow of fuel from said fuel injector inlet conduit through said nozzle opening;
• and
• a fuel rail assembly comprising:
• a fuel rail having 1) a fuel rail main conduit with a main fuel passage defined therein which is configured to receive fuel from a fuel source and 2) a fuel rail distribution conduit extending away from said fuel rail main conduit along a fuel rail distribution conduit axis, said fuel rail distribution conduit having a distribution passage extending therethrough which is in fluid communication with said main fuel passage, said fuel rail distribution conduit having a distribution conduit primary threaded section which is distal from said fuel rail main conduit, a distribution conduit secondary threaded section which is proximal to said fuel rail main conduit, and a distribution conduit sealing surface located axially between said distribution conduit primary threaded section and said distribution conduit secondary threaded section;
• a primary sealing nut which includes a primary sealing nut bore extending therethrough along said fuel rail distribution conduit axis, said primary sealing nut extending from a primary sealing nut first end which is proximal to said fuel rail main conduit to a primary sealing nut second end which is distal from said fuel rail main conduit, said primary sealing nut bore having 1) a primary sealing nut bore threaded section which threadably engages said distribution conduit primary threaded section and 2) a primary sealing nut bore primary sealing surface located between said primary sealing nut bore threaded section and said primary sealing nut second end and configured to sealingly mate with a fuel injector inlet conduit sealing surface of said fuel injector inlet conduit when said primary sealing nut is rotated to cause said primary sealing nut to move away from said fuel rail main conduit;
• a secondary sealing nut which includes a secondary sealing nut bore extending therethrough along said fuel rail distribution conduit axis, said secondary sealing nut extending from a secondary sealing nut first end which is proximal to said fuel rail main conduit to a secondary sealing nut second end which is distal from said fuel rail main conduit, said secondary sealing nut bore having a secondary sealing nut bore threaded section which threadably engages said distribution conduit secondary threaded section;
• and
• a sealing ring located within a counterbore of one of said primary sealing nut bore and said secondary sealing nut bore such that said sealing ring circumferentially surrounds said fuel rail distribution conduit, wherein said secondary sealing nut is configured to compress said sealing ring within said counterbore when said secondary sealing nut is rotated to cause said secondary sealing nut to move toward said primary sealing nut, thereby causing said sealing ring to sealingly engage said distribution conduit sealing surface and said primary sealing nut.