Patent ID: 7731695

Claim:
A seal assembly structured to establish sealing engagement with differently dimensioned instruments passing through a trocar, comprising: a trocar, a caged seal assembly freely movably disposed within a chamber of the trocar and defining a central channel extending through the entire height of the caged seal assembly for an instrument passing therethrough, said caged seal assembly including at least two seal segments having respective seal structure mating faces disposable into and out of a sealing orientation for the seal assembly wherein when the seal assembly is in the sealing orientation, said mating faces are in contact with each other, and the seal segments define the central channel, a cage structure having an outer circumference and said cage structure having at least two cage segments each connected to a different one of said seal segments wherein the cage segments are connected by a hinge disposed proximate the outer circumference of the cage structure and said hinge defining a linear axis of rotation parallel to an axis through the central channel and a biasing assembly connected to said cage structure and entirely disposed within the chamber of the trocar, and structured to normally bias said seal segments and mating faces into said sealing orientation.