Vent assembly and reservoirs including the same

A method of opening and closing a vent assembly, wherein the method comprises:

• moving a closure member along a cam surface between an unvented position and a vented position, wherein a sealing surface on the closure member closes an aperture when the closure member is in the unvented position, and wherein in the vented position, the sealing surface does not close the aperture;
• wherein movement of the closure member from the vented position to the unvented position generates a compressive force on the closure member such that the sealing surface of the closure member is forced against the wall of a reservoir when the sealing surface is positioned over the aperture, and
• wherein the reservoir defines an interior volume and the closure member is configured for rotation about an axis extending through the wall of the reservoir into the interior volume when moving between the vented position and the unvented position.

A method of opening and closing a vent assembly, wherein the method comprises:

• rotating a closure member along a cam surface mounted on a post extending from a wall of a reservoir, wherein the reservoir defines an interior volume, wherein the closure member rotates on the post about an axis extending through the post and the wall into the interior volume of the reservoir, wherein the closure member rotates between an unvented position and a vented position, wherein in the unvented position a sealing surface on the closure member closes the aperture, and wherein in the vented position, the sealing surface does not close the aperture;
• and wherein rotation of the closure member from the vented position to the unvented position generates a compressive force on the closure member between a closure member retainer on the post and a cam surface on the wall of the reservoir such that the sealing surface of the closure member is forced wall of the reservoir when the sealing surface is positioned over the aperture.