Patent ID: 8192534

Claim:
A filter for capturing and removing accumulated gas bubbles present in a liquid-carrying line, the filter adapted for integration into the liquid-carrying line, the filter comprising an expanded chamber having an inlet end and an outlet end, wherein the maximum diameter of the expanded chamber is greater than the diameter of the portion of liquid-carrying line into which it is adapted to be integrated, and wherein the expanded chamber comprises a single inner wall and an outer wall constructed so as to form two concentric chambers having a liquid flow path through the axis of the inner chamber, and wherein the inner wall is, under conditions of use, permeable to gasses but impermeable to liquids wherein the shape of the expanded chamber is spherical or ovoid and wherein the shape of the expanded chamber is asymmetrical, having a generally narrower diameter close to the inlet end and a generally broader diameter close to the outlet end such that in use, air bubbles present in the liquid carrying line are held in a stable position for venting through the inner wall.