Patent ID: 8186294

Claim:
A device for cutting a small first orifice in a wall at the bottom of the sea and for opening/closing said first orifice, the device comprising a base that has a large second orifice, and further comprising: anchor means secured to said base and suitable for anchoring said base reversibly on said wall, maintaining said large second orifice at a distance from said bottom wall; a deformable stopper secured to said base and enabling said large second orifice to be opened or closed depending on whether the stopper is respectively in its open or closed position on the base; deformer means for deforming said stopper, the deformer means being secured to said base, being independent of said anchor means, and being suitable for deforming said stopper to create sealing between said second orifice and said bottom wall after said base has been anchored on said bottom wall; and circular cutter means secured to said base and suitable: for moving through said large second orifice in the base to cut a said small first orifice that is circular beneath said large second orifice when said stopper is in the closed position and said base is anchored on said bottom wall; and for disengaging from said large second orifice to allow said first orifice to be opened when said stopper is in the open position.