Syringe assembly and syringe stopper
US5795337A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Apr 10, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/31516
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe stopper for use in a syringe barrel having a substantially cylindrical body comprises a piston-like stopper body for slidable fluid-tight engagement inside the barrel of the syringe. The body includes a distal end, a proximal end and a longitudinal axis therethrough. A distally directed, conically-shaped projection is positioned on the distal end of the stopper body. At least one elongate discontinuity, running along the conically-shaped projection, is provided. The discontinuity includes a first end on the conically-shaped projection and extends radially outwardly therefrom to a second end, as viewed from the distal end of the stopper. The discontinuity may be in the form of a raised rib or a recessed groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.