Fuel system inlet check valve with flame arresting feature

An inlet check valve assembly with flame arresting feature for a fuel system, comprising:

• a throat having an inside surface and a throat mouth;
• a valve member movably disposed in relation to said throat, wherein said valve member is movable between a fully closed state with respect to said throat whereat said throat mouth is closed by said valve member and a fully open state with respect to said throat, wherein when said valve member is at other than said fully closed state, fluidic communication through said inlet check valve assembly is provided by a separation distance of said inlet check valve assembly;
• a biasing agency biasing said valve member to the fully closed state;
• and
• an internal flame arresting feature disposed with respect to said valve member such that between said fully closed state and an intermediately open state a predetermined said separation distance is provided thereby;
• wherein said internal flame arresting feature comprises a flame arrester body protruding into said throat when said valve member is at the fully closed state, the protruding being defined by a flame arresting length of said flame arrester body with respect to said throat mouth such that said separation distance is provided between said flame arrester body and said throat during movement of said valve member between said fully closed state and said predetermined intermediately open state with respect to said throat.