Special atmosphere device

Claim 1

A PORTABLE DEVICE FOR PROVIDING AN INFLATABLE WORK CHAMBER CONTAINING A CONTROLLED GASEOUS MEDIUM AND ADAPTED FOR SAFELY MANIPULATING MATERIALS, COMPRISING A FLEXIBLE, COLLAPSIBLE AND TOTALLY ENCLOSED HOUSING MADE OF THIN PLASTIC SHEETS, AT LEAST ONE OF SAID SHEETS BEING TRANSPARENT, SAID SHEETS BEING JOINED AT THE EDGES THEREOF TO PROVIDE A GAS-TIGHT CONTAINER, TWO SLEEVED GLOVE-LIKE MEMBERS MADE OF THIN PLASTIC MATERIAL ATTACHED RESPECTIVELY TO THE EDGES OF TWO OPENINGS IN SAID HOUSING WHEREBY A PERSON CAN EASILY WORK MATERIALS WITHIN SAID HOUSING WITH BOTH HANDS, SAID HOUSING CONTAINING A GASEOUS MEDIUM AT A PRESSURE SLIGHTLY IN EXCESS OF THE PRESSURE OF THE SURROUNDING ATMOSPHERE TO FORM SAID WORK CHAMBER, SAID GASEOUS MEDIUM BEING THE SOLE MEANS FOR MAINTAINING SAID HOUSING EXTENDED SO AS TO FORM SAID CHAMBER, SAID GASEOUS MEDIUM BEING PRACTICALLY INERT WITH RESPECT TO SAID PLASTIC MATERIALS AND TO SUBSTANCES CONTAINED IN SAID CHAMBER, INLET MEANS ASSOCIATED WITH SAID HOUSING FOR INFLATING SAID HOUSING, AND OUTLET MEANS ASSOCIATED WITH SAID HOUSING FOR EXHAUSTING THE GASEOUS MEDIUM WITHIN SAID HOUSING.