Patent ID: 8869826

Claim:
A passive fluid flow regulator comprising at least a cylinder ( 2 ) with a fluid inlet connector ( 1 ) for receiving fluid at an inlet pressure and a fluid outlet connector ( 4 ) for delivering fluid, at least one chamber ( 3 ), a rod ( 5 ) in said cylinder with a first side submitted to the inlet pressure and a second side submitted to the outlet pressure generating a net force counter-balanced by at least one spring means ( 7 ) acting on the first or the second side of said rod ( 5 ) against said inlet pressure, wherein a fluidic pathway, which includes a channel formed between said rod ( 5 ) and said cylinder ( 2 ), extending from the first side to the second side of the rod, on a surface of the rod or an inner surface of the cylinder, is formed between said rod ( 5 ) and said cylinder ( 2 ) as a major fluidic resistance of the regulator, wherein a change of the inlet pressure induces a move of the rod ( 5 ) along an axis of the cylinder thereby increasing the fluidic resistance of said fluidic pathway due to an increase of the length of said pathway, wherein the fluidic resistance of said pathway varies with the applied pressure at the inlet in a predefined range of pressure, inducing a regulated flow rate in the considered range of pressure.