Patent · US Expired

Trocar flapper valve

US5989228A · kind A · utility

38Cited by
20References
13Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 13, 1996
Grant dateNov 23, 1999
Priority date
Expiry dateAug 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.