US Patent 11209083 Self-sealing membrane sleeve assembly

A sealing membrane assembly including a flange having a body with a through passage. A first sealing membrane defines a first flexible panel with a first axial sealed opening extending therethrough. The first axial sealed opening extends at an acute angle. A second sealing membrane defines a second flexible panel with a second axial sealed opening extending therethrough. The second axial sealed opening extends at an obtuse angle. The first and second sealing membranes are secured relative to the flange such that the first and second axial sealed openings crisscross one another and the first and second sealing membranes seal the through passage except through the first and second sealed openings.