Automatic cannula withdrawing device for injection syringes
US6015396A · kind A · utility
25Cited by
3References
25Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 12, 1997 |
| Grant date | Jan 18, 2000 |
| Priority date | — |
| Expiry date | Dec 12, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/3202
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An automatic needle retraction device includes a housing and retraction device for completely retracting a needle back into the housing after use. A selector switch device includes an equalization part, which produces a negative pressure to accept the fluid compressed during the retraction of the hollow needle. Thus, during retraction of the needle, compressed injection solution is not sprayed outward from the needle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.