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, the device comprising an adapter, wherein the shaft has a through opening configured to allow a fluid to pass through the adapter, characterized in that the compressible seal comprises a first portion including the first end of the compressible seal and a second portion including the second end of the compressible seal, the first portion being separated from the second portion by a spacer formed of a material different than a material of the first portion and different than a material of the second portion, wherein the first portion comprises a truncated cone having a large end at the first end of the compressible seal and a small end, wherein the spacer is located at the small end of the truncated cone, wherein the second portion comprises a cylinder on the spacer and wherein the shaft is configured to bias the second portion toward the first portion. 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, the device comprising an adapter, wherein the shaft has a through opening configured to allow a fluid to pass through the adapter, characterized in that the compressible seal comprises a first portion including the first end of the compressible seal and a second portion including the second end of the compressible seal, the first portion being separated from the second portion by a spacer formed of a material different than a material of the first portion and different than a material of the second portion, wherein the first portion comprises a truncated cone having a large end at the first end of the compressible seal and a small end, wherein the spacer is located at the small end of the truncated cone, wherein the second portion comprises a cylinder on the spacer and wherein the shaft is configured to bias the second portion toward the first portion.