Patent ID: 9259530
Filing Date: 2016-02-16
CPC Classification: A61M

Claim Text:
1. An implantable infusion device comprising: a positive pressure reservoir; a pump; a flow restrictor; an outlet, a first fluid flow path from the reservoir to the outlet, wherein the first fluid flow path includes the pump but not the flow restrictor, and wherein the pump is downstream of the reservoir, and the outlet is downstream of the pump; a second fluid flow path from the reservoir to the outlet, wherein the second fluid flow path includes the flow restrictor but not the pump, and wherein the flow restrictor is downstream of the reservoir, and the outlet is downstream of the flow restrictor, a first controllable valve, wherein the second flow path includes the first controllable valve upstream of the flow restrictor and downstream of the reservoir, wherein the first controllable valve is stable when exposed to a magnetic field; a second controllable valve, wherein the first flow path includes the second controllable valve downstream of the pump and upstream of the outlet; and third fluid flow path from the pump to the first controllable valve, wherein the first controllable valve is configured to prevent flow from the reservoir to the outlet via the second flow path unless the second controllable valve is closed and the pump is activated, wherein the first controllable valve comprises a first chamber in communication with the pump via the third flow path, a second chamber in communication with the reservoir via the second flow path, and a diaphragm sealingly dividing the first and second chambers.