Device for at least partially blocking an opening and forming a seal in the opening

A device for at least partially blocking an opening comprising:

• a first body having a bottom;
• a second body having a top and being rotatably mounted to the first body, the first body and the second body being movable between a first angular relationship and a second angular relationship;
• a first ramp having a first ramp surface on a first one of the first body and the second body;
• a ramp follower on a second one of the first body and the second body in contact with the first ramp surface;
• the first body bottom being separated from the second body top by a first distance when the first body and second body are in the first angular relationship and by a second distance greater than the first distance when the first body and the second body are in the second angular relationship;
• the ramp follower moving from a first location on the first ramp surface to a second location on the first ramp surface in response to the first body and the second body moving from the first angular relationship to the second angular relationship;
• a compressible seal extending from the first body, the compressible seal having a first end at the first body and a second end spaced from the first body and having an interior;
• a shaft projecting from the second body through a passage in the first body and into the interior of the compressible seal, the shaft being configured to move relative to the first body when the first body and the second body move from the first angular relationship to the second angular relationship and being configured to move the second end of the compressible seal toward the first body and compress the compressible seal when the first body and the second body move from the first angular relationship to the second angular relationship.

A device for at least partially blocking an opening comprising:

• a first body having a bottom, a top and a curved wall projecting from the top, the curved wall having a first end and a second end, and at least one curved sidewall, the curved wall following a periphery of the first body and having a wall top surface spaced from the first body top by a first distance, the first distance increasing from the first end of the curved wall to the second end of the curved wall;
• a second body having an open bottom, a top and an interior configured to receive the curved wall of the first body, the interior including a curved ramp having a first end and a second end and a bottom surface, the bottom surface being spaced from the second body top by a second distance, the second distance increasing from the first end of the second ramp to the second end of the second ramp, the second body being mounted on the first body with the bottom surface of the curved ramp resting on the top surface of the curved wall;
• a compressible seal extending from the first body bottom, the compressible seal having a first end at the first body and a second end spaced from the first body and an interior;
• and
• a shaft projecting from the second body through a passage in the first body and into the interior of the compressible seal.

A device for at least partially blocking an opening comprising:

• a first body having a bottom;
• a second body having a top and being mounted to the first body, the first body and the second body being mutually rotatable between a first angular relationship and a second angular relationship;
• the first body bottom being separated from the second body top by a first distance when the first body and second body are in the first angular relationship and by a second distance greater than the first distance when the first body and the second body are in the second angular relationship;
• a compressible seal extending from the first body, the compressible seal having a first end at the first body and a second end spaced from the first body and an interior;
• a shaft projecting from the second body through a passage in the first body and into the interior, the shaft being configured to move relative to the first body when the first body and the second body move from the first angular relationship to the second angular relationship and being configured to move the second end of the compressible seal toward the first body and compress the compressible seal when the first body and the second body move from the first angular relationship to the second angular relationship;
• and
• means for moving the second body top away from the first body bottom in response to the rotation of the first body and the second body from the first angular relationship to the second angular relationship.