Patent · US Expired

Universal seal for trocar assembly

US5197955A · kind A · utility

380Cited by

10References

26Claims

0Family size

Assignee

Ethicon, Inc. · US

Inventors

Randy R. Stephens · Lancaster, US
John Collins · Sagamore Hills, US
Robert Farra · Acton, US
Dean M. Pichon · Arlington, US

Key dates

Filing date	Oct 18, 1991
Grant date	Mar 30, 1993
Priority date	—
Expiry date	Oct 18, 2011

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M2039/0686
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

Trocar assembly devices are disclosed that include an improved seal assembly that accommodates instruments having a wide range of diameters. The seal assembly includes a universal seal member that is generally of hourglass shape defining converging and diverging side walls that form a constricted center bore portion therebetween. Various alternative means are provided to either increase or decrease the inner diameter of the center bore portion of the seal member.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.