Patent ID: 8821445

Claim:
A seal assembly comprising: a first and second seal made of a resilient material, the first and second seals configured in series and oriented to receive an elongated instrument through an opening in a center section of each of the first and second seals, wherein the second seal is moveably disposed in the assembly to allow the second seal to freely move radially and the opening in the center section of the first seal has a larger diameter than the opening in the second seal; and a cage assembly in which the second seal is located wherein the cage assembly is dimensioned to not allow the second seal to move in an axial direction but allows the entire second seal to move radially, wherein the second seal includes: an annularly shaped body having the opening in a center portion of the body being formed of two members; a resilient inner portion about the circumference of the opening; a hinge portion configured to allow the two members of the body to open to form a C shape; and a biasing element configured to bias the body to a closed annular shape.