An electrostatic pump or pumping liquids having a resistivity in the range of 10.sup.10 to 10.sup.7 ohm cm has a pump housing. The pump housing includes a passageway through which the liquid is pumped, and a single injection electrode disposed upstream of the passageway. The electrode has a sharp electrically-conducting...http://www.google.es/patents/US4634057?utm_source=gb-gplus-sharePatente US4634057 - Pumps and pump components
