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Trocar assembly

  • US 8,740,925 B2
  • Filed: 10/05/2009
  • Issued: 06/03/2014
  • Est. Priority Date: 10/10/2008
  • Status: Active Grant
First Claim
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1. A surgical system for penetrating tissue, which comprises:

  • a cannula assembly including;

    a cannula housing;

    a cannula sleeve depending from the cannula housing and defining a longitudinal axis; and

    an object seal disposed in mechanical cooperation with the cannula housing and being adapted to establish a substantial seal about an object inserted therethrough, the object seal comprising;

    a rigid insert including a first horizontal surface, a first vertical wall disposed inwardly of the first horizontal surface, and a second vertical wall disposed inwardly of the first vertical wall, the first vertical wall having a first diameter, the second vertical wall having a second diameter, the first diameter being larger than the second diameter; and

    an elastomeric seal disposed in mechanical cooperation with the rigid insert, the elastomeric seal including a horizontal surface disposed within the second vertical annular wall, and the elastomeric seal including an aperture disposed therein for accommodating insertion of a surgical instrument therethrough, the aperture defining a third diameter, the third diameter being smaller than the second diameter;

    an obturator assembly at least partially positionable within the cannula assembly, the obturator assembly including an obturator housing and an obturator member extending from the obturator housing, the obturator member having a leading penetrating member adapted to penetrate tissue.

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