US 5,205,624 AGranted

Material isolation enclosure

AssigneeThe United States of America as represented by the United States Department of Energy

InventorsCalvin J. Martell, Joel W. Dahlby, Bradford F. Gallimore, Bob E. Comer, Water A. Stone, David O. Carlson

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Abstract

An enclosure similar to a glovebox for isolating materials from the atmosphere, yet allowing a technician to manipulate the materials and also apparatus which is located inside the enclosure. A portion of a wall of the enclosure is comprised of at least one flexible curtain. An opening defined by a frame is provided for the technician to insert his hands and forearms into the enclosure. The frame is movable in one plane, so that the technician has access to substantially all of the working interior of the enclosure. As the frame is moved by the technician, while he accomplishes work inside the enclosure, the curtain moves such that the only opening through the enclosure wall is the frame. In a preferred embodiment, where a negative pressure is maintained inside the enclosure, the frame is comprised of airfoils so that turbulence is reduced, thereby enhancing material retention within the box.

Claims1

Dependent claims

An enclosure for isolating material from the atmosphere comprising:

a. an access zone;
b. an access frame which is capable of being moved to a plurality of locations within said access zone, said access frame having an access space through which an operator may insert his hands to manipulate material which is within said enclosure, where said access frame is comprised of members having an airfoil shape, which members are disposed to minimize turbulence at the perimeter of the access space;
c. means for exhausting air from said enclosure;
thereby causing air to flow into the enclosure;
d. a gap at the exterior perimeter of said access frame to provide a path for air flow into the enclosure, where a minor portion of the air flow into the enclosure is through said gap and a major portion of the air flow into the enclosure is through said access space in the access frame;
and
e. at least one flexible curtain which is disposed such that it covers all of said access zone not occupied by said access frame and said gap, at all times, including times when said access frame is being moved.

4 more elements

Dependencies are inferred from the claim text.