Patent ID: 8251316
Filing Date: 2012-08-28
Classification: B64G

Abstract:
1. A method for ingress and egress through a door of a support wall for vehicles, modules and structures from a relatively high pressure environment inside the support wall to a relatively low pressure environment outside the support wall, said method including: providing a flexible, gas impermeable membrane that cooperates with the support wall in an airtight manner to form an interior pocket over the door on the inside of the support wall; displacing air from within the interior pocket of the membrane from a non-collapsed condition toward a collapsed condition, collapsing the membrane about the door on the inside of the support wall; displacing said flexible membrane, in the collapsed condition, away from the door on the inside of the support wall, and forming a low pressure space therein, until the pressure differential between the low pressure created in the low pressure space and that on the other side of the support wall are sufficiently low so as to enable safe and free opening of the door; and opening the door of the support wall to permit one of ingress and egress therefrom.