Patent ID: 7134444
Filing Date: 2006-11-14
Classification: B01L,B08B,E04H,Y10S

Abstract:
1. A portable collapsible environmental containment unit comprising: (a) a collapsible, unitary framework having a set of extendable vertical supports; (b) at least one collapsible unitary horizontal support element extending between adjacent vertical supports,and (c) a flexible collapsible containment envelope secured to the interior of the framework and extending from the top of the containment unit downward to enclose the sides and bottom of the containment unit wherein the vertical supports can be raised to ceiling level and held in position against the ceiling to create a controlled environment within the containment unit and wherein the extendable vertical supports comprise first and second set of vertical supports, the second set being telescopically received in the first set and further including a unitary frame extension and flexible envelope removably mounted at the top of the framework and adapted to telescopically engage the top of the vertical supports wherein the containment envelope is open at the top to facilitate working in ceiling cavities and further including a removable opening on at least one vertical side of the containment envelope to permit ingress and egress of a worker when the enclosure is placed in working relation with a ceiling cavity.