Implantable infusion pump

US5836915A · kind A · utility

Assignee

• Fresenius AG · DE

Inventors

• Bernd Steinbach · Friedberg, DE
• Claus Walter · Glauburg, DE
• Andreas Wild · Weimar, DE

Key dates

• Filing date: Sep 18, 1995
• Grant date: Nov 17, 1998
• Expiry date: Sep 18, 2015

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M5/14276
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The invention concerns an implantable infusion pump for dosed emission of medicines into the human body comprising a pump chamber formed by an upper chamber portion (3) and a lower chamber portion (2), whereby said pump chamber is divided by a flexible membrane (6) into a pressure chamber (8) and a medicine reservoir (7). Refill apertures (12, 14) covered by septa (13, 15) are further provided. The septa (13, 15) are hermetically clamped by holders (4, 5). According to the invention, catch connections are used as main connections (31, 32, 33) and as ancillary connections (34, 35) for the connection of the pump components (2, 3, 4, 5), whereby the main connections (31, 32, 33) substantially support the interior pressure strain generated under normal operating load and the locked ancillary connections (34, 35) are hereby not or only nimimally brought into operation due to respective arrangement and dimensioning of the catch members. The ancillary connections (34, 35) are only activated in the case of a further pressure increase due to overload or failure of the main connections (31, 32, 33).