Patent ID: 9637396
Date: 2017-05-02
CPC Classifications: B01D,C02F

Claim:
1. A method of dispensing liquid from a fluid delivery device comprising a dip tube consisting of a single hollow hydrophilic tubular membrane positioned within the fluid delivery device and a spray head coupled to the dip tube, the dip tube having a wall with pores that are sized as a function of viscosity of the liquid being dispensed and a surface area of the tubular membrane, the method comprising; applying a pressure differential through the pores in the wall of the single hollow hydrophilic tubular membrane; and passing liquid within the fluid delivery device through the wall of the single hollow hydrophilic tubular membrane and thereby to the spray head, wherein the membrane is sized to extend across substantially a length of the fluid delivery device, and wherein the liquid can be dispensed substantially independent of an orientation of the fluid delivery device.