Trocar flapper valve
US5989228A · kind A · utility
38Cited by
20References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1996 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Aug 13, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/349
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A trocar is formed from a cannula and an interfitting obturator for penetrating body cavity walls in laparoscopic and endoscopic surgery. The cannula has an improved inexpensive flexible flapper valve and can be manufactured with a reusable cannula tube but disposable flapper valve assembly to minimize cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.