Two point contact flange for instrument seals

A valve assembly for use in an access device comprising:

• a retainer frame assembly including a first member and a second member;
• a centering mechanism configured to bias the valve assembly towards a generally centered position within an instrument valve housing of the access device, the centering mechanism including:
• a base seal member having:
• an annular base;
• and
• a flange portion including an arcuate portion configured to adjustably engage a first surface of the instrument valve housing and a second surface of the instrument valve housing of the access device in a sealing relation;
• a seal assembly attachable to the centering mechanism and configured to engage a surgical instrument inserted through the valve assembly in a sealing relation;
• and
• a guard assembly attachable to the base seal member and configured to protect the seal assembly during insertion and manipulation of the surgical instrument,
• wherein the retainer frame assembly is configured to secure the seal assembly and the guard assembly with the centering mechanism and the retainer frame assembly includes a first member, a second member, and a third member, the first member including pins extending through the guard assembly, the centering mechanism, the seal assembly, and the second member, and into the third member.

A valve assembly comprising:

• a centering mechanism configured to bias the valve assembly towards a centered position in a surgical access device, the centering mechanism including a base seal member having a flange portion, the flange portion including an arcuate portion configured to adjustably engage surfaces of the surgical access device in a sealing relation;
• a seal assembly attachable to the centering mechanism and configured to engage a surgical instrument inserted into the valve assembly in a sealing relation, the seal assembly including seal segments defining an opening configured to receive the surgical instrument in a sealing relation, the seal segments arranged about the opening in which adjacent seal segments are at least partially overlapped to enable relative movement between adjacent seal segments for adjustable engagement with the surgical instrument;
• a guard assembly attachable to the centering mechanism and configured to protect the seal assembly during insertion and manipulation of the surgical instrument;
• and
• a retainer frame assembly including pins extending through the guard assembly, the centering mechanism, and the seal assembly.