Stopper assembly having bypass features for use in a multi-chamber syringe barrel
US5865798A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1996 |
| Grant date | Feb 2, 1999 |
| Priority date | — |
| Expiry date | Jun 28, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/31516
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A stopper assembly having by-pass features for use in a multi-chamber syringe barrel. The stopper assembly includes a sequential stopper body responsive to fluid forces for enabling the sequential delivery of disparate contents, such as disparate fluids, separately held in the syringe barrel. The sequential stopper body has a generally cylindrical sidewall with a distal end, a proximal end and a longitudinal axis therethrough. The stopper assembly also includes a generally cylindrical flow channelizer mounted to the distal end of the sequential stopper body. The flow channelizer enables the reconstitution of dry medicament held in the syringe barrel distally of the flow channelizer. The flow channelizer features opposed proximal and distal ends and a generally cylindrical outer surface therebetween. At least one fluid flow channel extends between the proximal and distal ends of a flow channelizer. A distally directed, conically-shaped projection is located at the distal end of the flow channelizer to prevent the accumulation of dead space between the channelizer and the internal shoulder located at the distal end of the syringe barrel. The stopper assembly may be employed in a mult…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.