Mixing syringe assembly
US11185637B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2014 |
| Grant date | Nov 30, 2021 |
| Priority date | — |
| Expiry date | May 30, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/31505
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe assembly comprising a barrel for containing one or more medicaments, the barrel having a front outlet for allowing the expulsion of said one or more medicaments from the said barrel through said outlet, and a first stopper disposed in the barrel and axially moveable therein and defining a first volume in the barrel axially forwards of the first stopper and a second volume in the barrel axially rearwards of the first stopper. The first stopper has a two way valve that is moveable between a sealing configuration and an open configuration to selectively put the first volume in fluid communication with the second volume. The two way valve is moveable from the sealing configuration to the open configuration by an increase in fluid pressure in either of the first and second volumes. The syringe assembly additionally comprises a second stopper disposed in the barrel axially rearward of the first stopper and axially moveable therein, the second stopper providing a fluid tight seal at a rear end of the second volume. The syringe assembly further comprises a first plunger rod connected to the first stopper and extending axially rearwardly through the second stopper, the second stop…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.