Flush syringe having anti-reflux features
US7534233B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2003 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Jan 28, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/31523
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An I.V. flush syringe assembly includes a barrel having an inside surface defining a chamber for retaining fluid, an open proximal end and a distal end including a distal wall with an elongate tip extending distally therefrom having a passageway therethrough in fluid communication with the chamber. A plunger having an elongate body portion and a stopper slidably positioned in fluid-tight engagement with the inside surface of the barrel is provided. Anti-reflux structure in said barrel is provided for controlling stopper deflection when fluid has been delivered from the chamber and the stopper is in contact with structure on the distal wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.