Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
John R. Brustad0
Date of Patent
February 8, 2011
0Patent Application Number
126938600
Date Filed
January 26, 2010
0Patent Primary Examiner
Patent abstract
A trocar is provided with a cannula and a housing and valve assembly disposed in the housing which forms a housing seal, and instrument seal, and in some cases a zero seal. A gel material is included in the valve and provides the valve with superior flotation properties for maintaining the instrument seal even when the instrument is moved off-axis In order to accommodate movement of the gel material, voids can be formed within the valve housing and even within the gel material.
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