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

摘要

A fuel receiver assembly, that permits replacement of a worn fuel receiver without draining the fuel tank, includes a check valve receptacle having a male-pipe-threaded nipple which engages the female-threaded pipe coupling of the fuel tank. The check valve receptacle has a spring-biased, normally closed check valve that prevents fuel from escaping from the fuel tank. Fuel pressure from the refueling pump opens the normally-closed check valve. The check valve receptacle is designed to be a relatively permanent installation in the fuel tank, having ultra-low-wear components. The check valve receptacle also has a female-threaded socket that is coaxial with the male-pipe-threaded nipple. A specially-designed male-threaded fuel receiver engages the female-threaded socket. Sealing between the check valve receptacle and the replaceable fuel receiver is accomplished by an O-ring seal installed on the fuel receiver.