Patent Number: 
Section: abstract

A device for a tight connection between a first housing (1) having a wall (3), an opening (4), a flange (5) and a door (6), and a second housing (2) having a wall (7), an opening (8), a flange (9) and a door (10). The flanges are complementary, and elements are used to displace the door (6). Elements are used to hold the two doors against each other, and the housings communicate between each other via a communication space (13). There is an inner annular critical line on the door (6) and an outer annular critical line of risk of contamination on the flange (9). The device includes elements (25 and/or 26) that are structurally integrated into the door (6) and/or the flange (9) and can form a separation between the communication space and the inner annular critical line and/or the outer annular critical line, when the doors are open.