A cartridge 444, 644, 744 is adapted for mounting upon a receptacle 442, 642 in a parenterial fluid administration set 420 for delivering a drug or other beneficial agent to a patient. The cartridge 444, 644, 744 includes a beneficial agent-containing chamber 606 slidable from a first, pre-use position...http://www.google.ca/patents/US4850978?utm_source=gb-gplus-sharePatent US4850978 - Drug delivery cartridge with protective cover
