Syringe
US6821266B2 · kind B2 · utility
17Cited by
19References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2002 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Nov 12, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3231
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In a syringe, in which a needle assembly is engaged by a plunger and withdrawn into a syringe barrel for safe disposal, the plunger slides in a resilient insert secured at the proximal end of the barrel. The insert engages an annular ridge near the distal end of the plunger when the plunger, with the needle assembly attached to it, is fully withdrawn, thereby securely locking the plunger to the barrel, and reliably preventing distal movement of the plunger after the needle assembly is withdrawn into the interior of the barrel. The part of the plunger that protrudes proximally from the barrel may then be snapped off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.