A device for delivering a drug includes a body having a proximal end and a distal end and an opening in the distal end thereof. An orifice mechanism at the distal end of the body communicates with the opening. The orifice mechanism includes an inner member having a proximal end and a distal end; a winding...http://www.google.com.au/patents/US7211076?utm_source=gb-gplus-sharePatent US7211076 - Medical device for fluid delivery having low fluid flow rate
