An inkjet printhead is provided having ink chambers, ink ejection ports defined in the chambers, and cantilevered ejection arms positioned in the chambers. Each arm has a displacement area that acts on ink in the respective chamber through cantilevered movement of the arm to eject ink via the respective...http://www.google.de/patents/US7901049?utm_source=gb-gplus-sharePatent US7901049 - Inkjet printhead having proportional ejection ports and arms
