Patent ID: 8061738

Claim:
A gas replacement system comprising: a storage container for storing an object therewithin and including a container opening; a mount unit on which the storage container is mounted and that includes a mount unit opening; and a seal member disposed between the storage container and the mount unit so as to connect an inner space of the storage container with a gas supply or discharge system provided on the mount unit through the container opening and the mount unit opening, wherein the seal member comprises: a main body portion taking a ring shape and fixed along an outer periphery of one of the container opening and the mount unit opening; a first lip portion extending from an inner periphery of the ring shape of the main body portion to the storage container or the mount unit on which the main body portion is not fixed, and having a cylindrical shape of which an upper portion when cutting the cylindrical shape in a lengthwise direction is semi-circular so as to suppress flexural deformation thereof; a second lip portion extending from an outer periphery of the ring shape of the main body portion to the storage container or the mount unit on which the main body portion is not fixed, and having a funnel-like shape of which an inside diameter increases as it extends farther away from said main body portion so as to enhance flexural deformation thereof; and a hole penetrating to a sealed space formed by the first lip portion, the second lip portion, the main body portion, and a surface of the storage container or the mount unit on which the main body portion is not fixed, so as to generate a suction force by discharging the sealed space so that the first lip portion and the second lip portion closely contact with the surface of the storage container or the mount unit on which the main body portion is not fixed, and wherein the gas is supplied to or discharged from the storage container through a sealed path formed by closely contacting the first lip portion with the surface of the storage container or the mount unit on which the main body portion is not fixed, the second lip portion separates the sealed path and the sealed space from an ambiance by closely contacting with the storage container or the mount unit on which the main body portion is not fixed, and the gas supply operation to the inner space of the storage container or the gas discharge operation from the inner space of the storage container is conducted while closely contacting the first lip portion and the second lip portion with the surface of the storage container or the mount unit on which the main body portion is not fixed.