Patent ID: 8056833
Filing Date: 2011-11-15
Classification: B05C

Abstract:
1. A method for controlling a fluid dispensing operation in a fluid pump, the fluid pump including a cartridge that is releasably attached to a pump body of the fluid pump, the cartridge comprising a cartridge body having a cavity and a feed screw in the cavity, the method comprising: controlling a rotational position and rotational velocity of the feed screw at a controlled rate and volume using a closed-loop servo motor coupled to the feed screw to deliver fluid from a fluid inlet of the cavity to a fluid outlet of the cavity; and dispensing the fluid through outlet vents at an output end of a dispense tip in communication with the fluid outlet of the cavity of the cartridge body, the dispense tip having an opening at the output end of the dispense tip, the outlet vents comprising grooves in an outer surface of the output end of the dispense tip, the outlet vents extending radially from the opening at the output end.