Fully-integrated, fluid flow-control module designed for installation within an ISO filler neck of a top-fill def tank

A fully-integrated flow-control module which fits within an externally-threaded filler neck of a DEF tank, said flow-control module comprising:

• an adapter cap having internal threads that engage the externally-threaded filler neck of the DEF tank, said adapter cap being equipped with a pair of opposed slots which are positioned between a pair of locking shelves, each locking having a stop at one end thereof;
• a retainer bushing having upper and lower internal threads and upper external threads and a pair of opposed lugs which fit into the opposed slots of the adapter cap, and when the retainer bushing is rotated clockwise, the lugs move beneath the locking shelves until they contact the stops at the end of the locking shelves;
• a breather cap having internal threads that are securable to the external threads of the retainer bushing;
• a receiver socket securable to the upper internal threads of the retainer bushing;
• a receiver fitting securable to the receiver socket, said receiver fitting being couplable to a dry-break DEF filler nozzle;
• a pipe nipple externally treaded at both ends, an upper end thereof secured to the lower internal threads of the retainer bushing;
• a main valve body equipped with upper internal threads that are secured to a lower threaded end of the pipe nipple;
• a spring-biased valve piston installed within the main valve body so that it can slide both upwardly and downwardly therein, slidable movement of said valve piston being controlled by fluid pressure beneath the piston crown, said fluid pressure being controlled by fluid flow through a bleed path that begins through a bleed aperture in a center of the piston crown, said valve piston operating to open and close a fill port through which fluid enters the DEF tank;
• a bleed/float body, an upper end of which is secured to a lower end of the main valve body, said bleed/float body incorporating a majority of the bleed path;
• a fluid level float secured to a control rod and vertically slidable within a chamber at a bottom end of said bleed/float body;
• a bleed valve poppet that controls fluid flow through the bleed path;
• and
• a connector beam to which both the control rod and the bleed valve poppet are rigidly secured;
• wherein a rise of fluid level within the DEF tank causes the fluid level float to rise, thereby lifting the connector beam and bleed valve poppet such that the bleed valve poppet seals a bleed circuit escape port, thereby enabling the valve piston to close, which causes an increase in fluid pressure at a dry-break filler nozzle attached to the receiver fitting, and thereby causing the nozzle to shut off fluid flow therethrough.

A fully-integrated flow-control module which fits within an externally-threaded filler neck of a DEF tank, said flow-control module comprising:

• an adapter cap having internal threads that engage the externally-threaded filler neck of the DEF tank;
• a retainer bushing having upper and lower ends, said lower end being lockably couplable to the adapter cap;
• a breather cap securable to the upper end of the retainer bushing;
• a receiver socket also securable to the upper end of the retainer bushing;
• a receiver fitting secured to the receiver socket, said receiver fitting being couplable to a dry-break DEF filler nozzle;
• a pipe nipple having upper and lower ends, said upper end thereof being secured to the lower end of the retainer bushing;
• a main valve body having an upper end secured to the lower end of the pipe nipple;
• a spring-biased valve piston installed within the main valve body so that it can slide both upwardly and downwardly therein, slidable movement of said valve piston being controlled by fluid pressure beneath the piston crown, said fluid pressure being controlled by fluid flow through a bleed path that begins through a bleed aperture in a center of the piston crown, said valve piston operating to open and close a fill port through which fluid enters the DEF tank;
• a bleed/float body, an upper end of which is secured to a lower end of the main valve body, said bleed/float body incorporating a majority of the bleed path;
• a fluid level float secured to a control rod and vertically slidable within a chamber at a bottom end of said bleed/float body;
• a bleed valve poppet that controls fluid flow through the bleed path;
• and
• a connector beam to which both the control rod and the bleed valve poppet are rigidly secured;
• wherein a rise of fluid level within the DEF tank causes the fluid level float to rise, thereby lifting the connector beam and bleed valve poppet such that the bleed valve poppet seals a bleed circuit escape port, thereby enabling the valve piston to close, which causes an increase in fluid pressure at a dry-break filler nozzle attached to the receiver fitting, and thereby causing the nozzle to shut off fluid flow therethrough.