Patent · US Active

Injection device with secondary reservoir

US7981081B2 · kind B2 · utility

19Cited by

20References

20Claims

0Family size

Assignee

Becton, Dickinson and Company · US

Inventors

Ronald Marsh · Hackettstown, US
Mark Follman · Glen Rock, US
Edward P. Browka · Chapel Hill, US

Key dates

Filing date	Oct 30, 2009
Grant date	Jul 19, 2011
Priority date	—
Expiry date	Oct 30, 2029

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M2005/3128
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A method and apparatus for injecting fluid into areas having high density tissue that creates a high backpressure resistance on the injection device is disclosed. The high backpressure resistance is overcome through a mechanical advantage achieved by using a secondary reservoir having a cross-sectional area smaller than the cross-sectional area of a primary reservoir. Exemplary injection device reservoir housings may comprise a primary reservoir, a secondary reservoir, a check valve, a septum penetrating cannula, travel limits, a pen needle connecting portion, sliding seal guide ribs, a sliding seal, a pen needle assembly, a needle stop, and a patient needle.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.