Apparatus for removing gas filter

In combination with a filter mounted in a working position adjacent and on one side of an opening in a wall, apparatus for enabling the lifting of said filter from its working position on said one said of said wall, through said opening in said wall and into the open environment on the other side of said wall, without substantial dispersal of dirt from said filter into said open environment, comprising:

• a annular portable centrally-apertured stand comprising a ring having a circumferential web extending upwardly therefrom and having a passage extending through it of diameter large enough for said filter to be at least partially removed through it, and removably positioned over said opening on the opposite side of said wall from filter, with said passage aligned with said opening;
• tubular means of flexible material having one end disposed about an outer portion of said stand and secured to said stand so that the interior of one end of said tubular means surrounds the space directly above said opening in said wall, whereby at least a portion of said tubular means can be manually stripped from said stand and said filter can be withdrawn through said opening into said tubular means by grasping said filter through said flexible material of said tubular means;
• said stand being adapted temporarily to maintain its position over said opening and on the surface of said wall on said one side thereof, despite normal forces tending to displace it produced in response to said removing of said filter through said opening.