Patents Assigned to Scientific Products and Systems
  • Multiple port dual diameter pumps
    Patent number: 7207780
    Abstract: A multiple port, dual diameter piston fluid dispensing pump which includes multiple input and output ports accessed by rotating at least one of the pistons and a dual or multiple diameter piston or set of pistons that cooperate so that they follow each other. The dispensing piston is of smaller diameter than the pushing piston. This diameter difference permits a longer, controllable stroke to dispense micro-liters of fluid accurately.
    Type: Grant
    Filed: October 14, 2004
    Date of Patent: April 24, 2007
    Assignee: Scientific Products and Systems
    Inventor: David T. Bach