An implantable artificial sphincter system provides long-term adjustment via transcutaneous energy transfer (TET), minimizing invasive adjustment through adding or removing fluid via a syringe. An infuser device provides bi-directional fluid transfer via a flexible conduit to a sphincter band, such as...http://www.google.de/patents/US7374565?utm_source=gb-gplus-sharePatent US7374565 - Bi-directional infuser pump with volume braking for hydraulically controlling an adjustable gastric band
