Apparatus for administering parenteral solutions

Claim 1

IN AN APPARATUS FOR ADMINISTRATION OF PARENTERAL FLUIDS, A PRIMARY LIQUID CONTAINER INCLUDING MEANS DEFINING A FIRST PAIR OF CLOSELY-SPACED PORTS, A SECONDARY CONTAINER HAVING TWO ENDS AND INCLUDING VENT MEANS AND CLOSURE MEANS AT ONE END DEFINING A SECOND PAIR OF CLOSELY-SPACED PORTS AND MEANS AT THE OTHER END DEFINING AN EXIT PORT, A FIRST LENGTH OF FLEXIBLE TUBING HAVING A PROXIMAL END IN COMMUNICATION WITH SAID EXIT PORT AND A DISTAL END CONNECTED TO AN INTRAVENOUS CANNULA, A SECOND LENGTH OF FLEXIBLE TUBING INTERCOMMUNICATING ONE OF EACH OF SAID FIRST AND SECOND PAIRS OF PORTS, AND MEANS INCLUDING A THIRD LENGTH OF FLEXIBLE TUBING INTERCOMMUNICATING THE OTHER OF EACH OF SAID FIRST AND SECOND PAIRS OF PORTS PROVIDING A GREATER RESISTANCE TO LIQUID FLOW FROM SAID PRIMARY CONTAINER TO SAID SECONDARY CONTAINER THAN IS PROVIDED BY SAID SECOND LENGTH OF TUBING, WHEREBY LIQUID FLOW FROM SAID PRIMARY CONTAINER TO SAID SECONDARY CONTAINER WILL OCCUR THROUGH SAID SECOND LENGTH OF TUBING AND AIR FLOW FROM SAID SECONDARY CONTAINER TO SAID PRIMARY CONTAINER WILL OCCUR THROUGH SAID THIRD LENGTH OF TUBING.