Patent ID: 8550128

Claim:
A refilling system for use in refilling a container with a fluid from a fluid source, said container having air space above a fluid space, said fluid having a fluid level within said container, said refilling system comprising: a fluid flow control valve, said fluid flow control valve comprising a piston, a fluid source connector, an upper portion, a lower portion, an upper bleed port, a lower bleed port, an inlet port, a bleed passage, and at least one lateral fluid flow passage, wherein: said fluid source connector connecting said fluid source to an upper portion inlet orifice; said upper portion comprising said inlet orifice, an outlet orifice defining a seat, and a first chamber defined between said inlet orifice and said outlet orifice; said piston having a head, said head configured for mating engagement with said seat, said piston movable from a closed position where said head engages said seat thereby closing said outlet orifice, to an open position where said head is not engaged with said seat thereby opening said outlet orifice; said lower portion comprising a housing configured for receiving said piston therein, said housing having an internal sidewall defining an open topped cylinder having an end wall, said piston slidably received within said cylinder, the space within the cylinder between said end wall and said piston defining a second chamber, said lower portion further comprising said lower bleed port; said inlet port defined in said fluid flow control valve; said bleed passage extending from said inlet port to said lower bleed port, said bleed passage further extending to said upper bleed port; said lower bleed port fluidly connected to said second chamber; said upper bleed port fluidly connected to said first chamber; and said at least one lateral fluid flow passage is defined in said internal sidewall, said at least one lateral fluid flow passage for allowing fluid passing through the fluid flow control valve to be conveyed into the container, wherein said head sealing against said seat closes said at least one lateral fluid flow passage.