The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 1996
Filed:
Jul. 14, 1994
Charles C Hart, Huntington Beach, CA (US);
Vincent C Tangherlini, Rancho Santa Margarita, CA (US);
Other;
Abstract
A trocar adapted to extend across the body wall into a body cavity, and to form a seal around an instrument inserted through the trocar comprises a cannula having a first axis extending between a proximal end and a distal end. A valve housing attached to the proximal end of the cannula forms a working channel with the cannula and includes a rigid housing portion and a flexible housing portion. First and second septum valves are formed in an end wall of the flexible housing portion and form separate valve sets with associated zero closure valves disposed within the valve housing. The valve sets are sized and configured to accommodate different ranges of instrument diameters. The first and second septum valves are offset from the axis of the cannula in their natural positions but are movable to positions more aligned with the axis of the cannula, due to elastomeric characteristics of the flexible housing portions. With multiple valve sets, the trocar can accommodate the simultaneous insertion of two instruments, as well as a full range of instrument diameters.