Refueling assembly having a check valve receptacle and a replaceable fuel receiver for bottom-filled fuel tanks

A liquid fuel storage reservoir assembly comprising:

• an enclosed tank having a threaded coupling sealably installed at or near the bottom thereof, said coupling having an opening in communication with a fillable interior volume of the tank;
• a quantity of fuel at least partially filling said tank;
• a fuel receiver and check valve assembly having:
• a check valve body having a flow-through chamber, an entrance end, and an exit end threaded to engage the threaded coupling;
• a spring-loaded, normally-closed valve that blocks said flow-through chamber when closed, thereby being subjected to gravity-generated pressure from said quantity of fuel, and that opens said flow-through chamber during tank filling operations;
• a fuel receiver body having a generally tubular chamber, said generally tubular chamber having an entrance end that is couplable to a fuel nozzle, and an exit end that engages the entrance end of said check valve body;
• and
• a normally-closed, spring-biased valve plug that seals the entrance end of said generally tubular chamber, said valve plug being opened by the engagement of a fuel nozzle.

A liquid fuel storage reservoir assembly comprising:

• an enclosed tank having a threaded coupling sealably installed at or near the bottom thereof, said coupling having an opening in communication with a fillable interior volume of the tank;
• a quantity of fuel at least partially filling said tank;
• a check valve assembly having:
• a check valve body having a flow-through chamber with an entrance couplable to a fuel receiver that is adapted to receive a fueling nozzle and exit end having external threads sized to engage the threaded coupling;
• and
• a spring-loaded, normally-closed check valve that blocks said flow-through chamber, said normally-closed check valve being subjected to gravity-generated pressure from said quantity of fuel, said normally-closed check valve opening in response to pressurized fuel provided by a fuel nozzle.