Cannula needle for catheter
US4377165A · kind A · utility
37Cited by
8References
12Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 8, 1981 |
| Grant date | Mar 22, 1983 |
| Priority date | — |
| Expiry date | Jun 8, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M25/0009
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A cannula needle for a catheter is provided from flat metal sheet blank stock. A groove of controlled depth is formed on the metal sheet which is then rolled to produce a hollow barrel having a slit parallel to the longitudinal axis; the barrel is then cut into individual needles. Gripping wings are then welded to each needle on either side of the slit in a separate operation. In use, when the wings are flexed, the needle will easily split in half along the groove. This enables the cannula to be separated from the catheter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.