Check valve for the pre-combustion chamber of an internal combustion engine

A ball-type check valve having an elongated, axial profile and adapted to be placed in parallel relationship with a substantially cylindrical spark plug in a threaded socket in the spark plug well of the pre-combustion chamber of an internal combustion engine, the check valve comprising:

• a. a body having an axial central bore with opposite open ends;
• b. one end having a cylindrical peripheral body portion including external threads adapted to be received in the threaded socket for defining an outlet of said body;
• c. an opposite internally threaded end adapted for receiving an externally threaded connector adapted for connecting a fuel supply line to the check valve;
• d. a closure assembly mounted on the outlet end, the closure assembly defining an open peripheral gap between the outlet end and the closure assembly, the closure assembly further including an outlet port and channels for communicating the gap with the outlet port;
• e. a ball seat in the closure assembly;
• and
• f. a ball closure element in the ball seat and movable into the gap to close the outlet end and out of the gap to open the outlet end wherein fluid enters into said gap and flows into and through said channels when said outlet end is open.