Composite closure-drip chamber-valve means unit for administration of liquids

Claim 1

A COMPACT DISPOSABLE COMPOSITE UNIT FOR INTERCONNECTING A CONTAINER OF LIQUID TO BE ADMINISTERED AND A TUBE FOR CONDUCTING THE LIQUID TO A PATIENT COMPRISING, IN COMBINATION: AN ELONGATED THIN WALLED FLEXIBLE TRANSPARENT CYLINDRICAL MEMBER DEFINING A CHAMBER FOR OBSERVATION OF LIQUID, SAID CYLINDRICAL MEMBER HAVING OPPOSITE END PORTIONS; CLOSURE MEANS CARRIED BY ONE END PORTION FOR CONNECTING SAID UNIT TO SUCH A CONTAINER OF LIQUID, SAID CLOSURE MEANS INCLUDING A PASSAGEWAY COMMUNICATING WITH SAID CHAMBER AND SUCH CONTAINER; AND A VALVE MEANS CARRIED BY AND AT THE OTHER END PORTION OF THE CYLINDRICAL MEMBER, SAID VALVE MEANS COMPRISING A PLUG MEMBER RECEIVABLE IN SAID OTHER END PORTION AND INCLUDING A THRU BORE, A VALVE PASSAGEWAY ON THE OUTER FACE OF THE PLUG MEMBER COMMUNICATING WITH THE BORE, AN EXTERNAL VALVE MEMBER HAVING AN INNER FACE SLIDABLY AND SEALINGLY ENGAGING SAID OUTER FACE ON THE PLUG MEMBER AND COOPERABLE WITH THE VALVE PASSAGEWAY TO VARY FLOW AREA THEREOF, SAID VALVE MEMBER HAVING A PORT COMMUNICATING WITH SAID PASSAGEWAY AND A TUBE, SAID VALVE MEMBER BEING ROTATABLE TO DISPLACE SAID PORT WITH RESPECT TO SAID VALVE PASSAGEWAY; AND MEANS ROTATABLY MOUNTING SAID VALVE MEMBER ON SAID PLUG MEMBER, SAID MOUNTING MEANS INCLUDING AN ANNULAR INTERNAL RIB ON SAID VALVE MEMBER AND AN EXTERNAL ANNULAR GROOVE ON SAID PLUG MEMBER RECEIVING SAID RIB.