Patent ID: 8695679
Filing Date: 2014-04-15
Classification: B01L,C12M

Abstract:
1. A user access system for a controlled atmosphere apparatus comprising: a wall having a porthole extending through the wall; a first sealing assembly comprising a first closure member that is adapted to at least substantially seal the porthole when arranged in a closed position and allow user access to the porthole when arranged in an open position; and a second sealing assembly mounted so as to extend at least substantially across the porthole and comprising a sealed access member having a peripheral edge that defines a user access aperture having a smaller diameter than the porthole and forms a sealing contact with an arm of an operator when the operator extends the arm through the user access aperture, and a second closure member that substantially extends across the diameter of the user access aperture when arranged in a closed position thereby substantially sealing the user access aperture, wherein the second closure member moves, in response to the operator extending the arm through the porthole, to an open position in which the second closure member does not substantially extend across the diameter of the user access aperture.