An apparatus for accurately infusing medicinal agents into an ambulatory patient at specific rates over extended periods of time. The apparatus is of a compact, low profile, laminate construction and includes an elastic distendable membrane, chamber having a fluid outlet. Disposed within the fluid chamber...http://www.google.co.uk/patents/US6159180?utm_source=gb-gplus-sharePatent US6159180 - Fluid delivery apparatus with flow indicator and vial fill
