Patent ID: 6256786
Filing Date: 2001-07-10
Classification: B64G

Abstract:
A pressure-assist closed closure system for use upon an enclosure to be internally pressurized, comprising:a frame member defined upon the enclosure; anda pressure-assist closed closure member movably mounted upon said frame member between a fully opened position and a closed position,wherein when said pressure-assist closed closure member is disposed at said closed position with respect to said frame member, internal pressurization of the enclosure causes said pressure-assist closed closure member to tightly engage said frame member in an air-tight manner whereby said pressure-assist closed closure member cannot be subsequently opened until the enclosure is depressurized; andwherein when said pressure-assist closed closure member is disposed at said fully opened position so as to permit ingress into and egress out from the enclosure, a first portion of said closure member is disposed interiorly of said frame member and within the enclosure while a second portion of said closure member is disposed exteriorly of said frame member and outside of the enclosure.