An improved microprocessor-controlled dual piston-pump viscous fluid dispensing system as for dispensing uniform sealing beads and the like (as well as other types of uniform deposits), wherein the pressure throughout the fluid path is maintained constant including during the switching alternately between...http://www.google.es/patents/US7225946?utm_source=gb-gplus-sharePatente US7225946 - Constant pressure fluid-dispensing pumping system and method
Constant pressure fluid-dispensing pumping system and method
