Aspiration, mixing, and injection syringe
US5522804A · kind A · utility
Inventor
Key dates
| Filing date | Apr 22, 1994 |
| Grant date | Jun 4, 1996 |
| Priority date | — |
| Expiry date | Apr 22, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3223
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A drug-mixing syringe is provided that includes a barrel and a drug vial having an open distal end and sized to be slidingly received within the barrel bore. A stopper is received within and occludes the open distal end of the drug vial. The stopper includes a distal portion having at least one member projecting beyond at least a portion of the outer wall of the drug vial into engagement with an inner wall of the barrel bore when the drug vial and shopper are inserted into the barrel bore. The projecting member is displaceable relative to the barrel bore so that when the vial is inserted along the barrel bore, the projecting member is displaced along the barrel bore, and so that after the vial has been advanced to a particular extent, then retraction of the vial relative to the barrel bore causes the stopper to be displaced out of the distal end of the drug vial and retained in the barrel bore. The stopper defines at least one flow channel extending adjacent the distal portion when the stopper is received into the barrel so that when fluid flows through the barrel, fluid can flow through the flow channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.