Patent ID: 8955561
Filing Date: 2015-02-17
Classification: B65B,B67D,G01F,G05D

Abstract:
1. A refilling system for use in refilling a container with a fluid from a fluid source, said container having an air space above a fluid space, said fluid having a fluid level within said container, said refilling system comprising: a pilot-operated fluid flow control valve fluidly connected with a fluid level sensor via a pressure line and a bleed line, wherein: said pilot operated fluid flow control valve comprising a housing, a main fluid flow passageway extending through said housing, a valve closure element interrupting said main fluid flow passageway and able to move from a first position where said main fluid flow passageway is interrupted to a second position where said main fluid flow passageway is not interrupted; said pressure line in fluid communication with said control valve, said pressure line fluidly connecting with said fluid level sensor; said bleed line in fluid communication with said control valve, said bleed line fluidly connecting with said fluid level sensor; and said fluid level sensor comprising a pressure operated level sensor and a pilot valve, said pressure operated level sensor fluidly connecting with said pressure line, said pressure line transmitting pressure from said control valve to said fluid level sensor, said pressure operated level sensor sensing the level of fluid in said container, wherein if the level of fluid sensed is below a predetermined level the pressure operated level sensor outputs a minimum pressure through a posterior pressure passageway to said pilot valve, wherein if the level of fluid sensed is equal to or above a predetermined level the pressure operated level sensor outputs less than a minimum pressure through a posterior pressure passageway to said pilot valve, and said pilot valve comprising an inlet fluidly connected to said bleed line, an outlet, and an interrupt valve able to move between an open position where fluid can pass from said bleed line through said pilot valve, and a closed position where said fluid is prevented from passing through said pilot valve, said pilot valve fluidly connected with said posterior pressure passageway, wherein responsive to less than a minimum pressure from said posterior pressure passageway said interrupt valve moves to its closed position, and wherein responsive to at least a minimum pressure from said posterior pressure passageway said interrupt valve moves to its open position, wherein when said pilot valve is closed, the valve closure element of the control valve moves to its first position, and wherein when said pilot valve is open, the valve closure element of the control valve is able to move to its second position.