Displacement metering with two independently metered fluid flows comprises displacing fluid in laminar filament flow from a first chamber through a second chamber into a third chamber, the chambers being separated by a pair of spaced walls provided with coaxially aligned orifices in communicating series...http://www.google.fr/patents/US4001678?utm_source=gb-gplus-shareBrevet US4001678 - Displacement metering with independent ancillary flow
Displacement metering with independent ancillary flow
