Patent ID: 8596996

Claim:
A pump arrangement comprising: a pump for pumping a medium from a suction side to a pressure side, comprising: a filter arrangement comprising: an inflow path, a first outflow path and a second outflow path; a hydrophobic membrane filter located between the inflow path and the first outflow path; a hydrophilic membrane filter located between the inflow path and the second outflow path, wherein at least one section of the hydrophobic membrane filter and of the hydrophilic membrane filter are mutually opposed with a distance between them, said distance amounting to no more than 1 mm, so that a gas bubble which moves into a space located between the hydrophobic membrane filter and the hydrophilic membrane filter along with a medium flowing in the inflow path comes into contact with the hydrophobic membrane filter during the movement, wherein the first and second outflow paths of the filter arrangement being connected to the suction side of the pump, so that the gas bubble is guided through the filter arrangement, and wherein several oppositely arranged sections of the hydrophobic and hydrophilic membrane filters are configured downstream from the medium so that downstream from the medium, hydrophobic and hydrophilic sections alternate.