An implantable osmotically driven delivery system having a dynamic, two-way valve and a self-adjusting, variable geometry fluid flow channel. As pressure within the agent delivery system increases, the fluid channel narrows, thereby restricting flow. At exceptionally high pressures, the valve can be...http://www.google.es/patents/US7316680?utm_source=gb-gplus-sharePatente US7316680 - Osmotic delivery device having a two-way valve and a dynamically self-adjusting flow channel
Osmotic delivery device having a two-way valve and a dynamically self ...
