Abstract: The present invention comprises a small, precise measuring pump provided with a germ barrier that is specifically designed for intravenous feeding devices in which the fluid being pumped is positively displaced; in which there is no rubbing contact of one member with another which would be destructive of blood being pumped; the pumping chambers are small, so that they will hold as little fluid as possible; and in which the valves are actuated by gravity and which are tight-sealing when the pump is in a substantially vertical position, but which, when the pump is tipped on its side, are open to permit the preliminary filling of the pump with the fluid to be pumped.

Abstract: This invention relates to a drug dispensing capsule in which the drug may be first mixed with a predetermined quantity of parenteral fluid (the solution to be administered to the patient). It is adapted to be used at the discharge end of an intravenous feeding pump and will automatically switch over to the parenteral fluid as soon as the drug dosage has been dispensed. The device comprises a cylindrical chamber somewhat of the nature of an enlarged hypodermic syringe. It has an inlet at one end and an outlet at the other. A piston-like fluid separator is slidably mounted on the interior of said cylindrical chamber. The drug mixture to be administered is placed in the chamber between the piston and the discharge end of the chamber. The capsule is placed in the pumping system at the discharge end of the pump, the outlet from the device being connected to the tube to the needle inserted in the blood vessel of a patient.