Patent ID: 8197404

Claim:
A surgical access device adapted for disposition relative to an incision in a patient, the surgical access device comprising: a valve including a plurality of interwoven, overlapping sheets defining an access channel, wherein each of the sheets has a respective mounting flange, wherein each of the sheets further comprises an elastic barrier portion extending from the respective mounting flange, wherein the mounting flange of each sheet comprises at least two mounting flange portions separated by a step having a height at an outermost radial position, wherein the height of the step tapers as the radial distance from a center of the valve decreases, wherein the elastic barrier portions of the plurality of interwoven, overlapping sheets together define a conical shape; an upper ring; and a base ring having an inner diameter for holding the valve by fixing each of the overlapping sheets along a portion of the perimeter, wherein the base ring has a first upper surface and a second upper surface, wherein the second upper surface is lower than the first upper surface such that the second upper surface defines an annular recess, wherein the mounting flanges are stacked in the annular recess, wherein the upper ring is coupled to the first upper surface of the base ring to secure the stacked mounting flanges in the annular recess, wherein the access channel is configured to provide access through the incision in the patient.