Stoppers used in pre-filled syringes
US8740856B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2010 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Oct 17, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/31523
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A stopper adapted for attachment with a plunger rod for use within a syringe barrel is disclosed. The stopper includes a main body defining an open rearward end and a closed front end. The open rearward end is adapted to receive a front forward end attachment portion of the plunger rod. The stopper also includes a core member integrally formed with the main body adjacent the closed front end. The core member includes a nose portion having a conical tip configured for entering an outlet opening of the syringe barrel. The closed front end of the stopper has a profile configured to cooperate with an internal surface of the syringe barrel wall to prevent reflux and reduce dead space within the barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.