US 5,291,923 AGranted

Door opening system and method

AssigneeInternatinal Business Machines Corporation

InventorsGary M. Gallagher, Gordon E. Johnson

Life of this patent

Estimating the term…

Loading patent…

Abstract

A reusable isolation structure features an easily cleanable shell. The opening of the shell includes a groove formed around the periphery thereof and is preferably not more than slightly smaller than an interior cross-section of the shell. A closure member (door) of the isolation structure is dimensioned to fit within the opening and has a resilient seal member clamped to the periphery of a backbone by front and rear plates. The front and rear plates cooperate with grooves formed in the backbone to define a preferred form of manifold for coupling pressure or a vacuum to the interior of the resilient seal member whereby the resilient seal member may be collapsed to allow removal of the closure member or allowed to expand or pressurized to provide secure closure member. A vacuum structure for handling the closure member simultaneously provides for evacuation and controlled collapse of the resilient seal member as well as containment of contamination of the exterior thereof.

Claims6

Dependent claims

A system for opening and closing an isolation structure comprising:

said isolation structure including
a shell having an interior adapted to accommodate a contamination sensitive item and having an opening leading to said interior, and
a closure member adapted to engage and disengage said shell opening, said closure member having
a closure member being having an outer periphery and a resilient seal on said outer periphery, said resilient seal and said closure member body defining a first volume therebetween, said closure member body further having a rear surface facing said shell interior when said closure member is received within said shell opening and a front surface opposite said rear surface, said front surface having at least one aperture therein, and a manifold for communicating pneumatic pressure between said first volume and said at least one aperture in said front surface, and
holding means for engaging and disengaging said closure member from said shell opening, said holding means including a structure adapted to removably engage said front surface of said closure member body in a sealed manner to define a second volume between said front surface and said structure, said holding means further including vacuum means for drawing a partial vacuum within said second volume and said second volume being in pneumatic communication with said first volume through said at least one aperture in said front surface.

2 more elements

Dependencies are inferred from the claim text.