Hypodermic needle
US5290267A · kind A · utility
85Cited by
6References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1993 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Feb 19, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/3286
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention concerns a cannula comprising a cannula tube with a preferably rigid upper section, an end section which is bent laterally and a hook-shaped curved section which has in its concave side a tangentially inward ground lumen opening. The lumen opening has a sharply inwardly directed rear edge. This results in the advantage that during piercing of natural and synthetic walls the cutting of plugs from the material to be perforated is avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.