Infusion device with active and passive check valves
US8323267B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2006 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Jan 27, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2039/248
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An infusion system in which therapeutic substance from a reservoir is pumped by a bolus pump to an infusion port is disclosed. The therapeutic substance delivered by the bolus pump passes first through a passive check valve located downstream from the pump. The passive check valve opens in response to fluid pressure of the therapeutic substance. After passing through the passive check valve, the therapeutic substance passes through an active check valve located downstream from the passive check if the active check valve is actuated such that it is open. When not activated, the active check valve is closed and fluid flow through the active check valve in the downstream direction is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.