Retractable obturator for a trocar
US5522833A · kind A · utility
73Cited by
11References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1994 |
| Grant date | Jun 4, 1996 |
| Priority date | — |
| Expiry date | Aug 29, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/3474
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A retractable obturator trocar with a puncturing tip is provided. Preferably the obturator includes a safety shield covering the puncturing tip in an unarmed position and permitting the tip to extend distally from the safety shield in an armed position. The obturator preferably includes a spool retracting mechanism which causes the distally extended obturator to retract into the safety shield when a force is applied to the puncturing tip. The obturator may also be manually disengaged. The safety shield and obturator preferably extend out of the distal end of the cannula whether the trocar is armed or unarmed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.