Safety syringe
US5295973A · kind A · utility
9Cited by
5References
1Claims
0Family size
Inventor
Key dates
| Filing date | Jun 7, 1993 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Jun 7, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3284
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hollow needle is adapted to be used in a safety syringe which is automatically blocked by a rigid blocking member after finishing an injection and retraction of the used needle into a syringe cylinder, having a bifurcated slot longitudinally notched in a rear portion of a shank and needle head portion of the hollow needle and a plurality of protrusions annularly formed on a circumferential surface of the shank portion of the needle for an easier, smooth and stable embedding of the needle on the rigid blocking member in the syringe, thereby being helpful for a smooth injection and retraction operation of the needle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.