Abstract: Disclosed is a vacuum apparatus that is not complicated in construction, does not require two receptacle bodies, and is improved in vacuum efficiency. The vacuum apparatus includes a cylinder member provided with a guide shaft disposed in the central area of the inner space thereof, and a piston module including a separating and opening/closing unit and a hollow rod unit with a guide bore in the inside thereof extending downward from the central area of the separating and opening/closing unit. The piston module is fitted in the inside of the cylinder member to separate the inner space of the cylinder member into an upper first space and a lower second space, and provided with a first O-ring to open/close the first space and the second space in relation to each other while being moved vertically according to a moving direction in relation to the cylinder member.

Abstract: Disclosed is a rubber seal for a vacuum receptacle. The rubber seal is not released by a negative pressure developed in the vacuum receptacle. In addition, the rubber seal is excellent in sealing force, and has a body portion that does not bulge outward while being readily mounted on a lid body. The rubber seal includes: the body portion that surrounds the lateral side of an inner space and extends vertically; an elastic sealing wing portion formed to extend outward from the body portion and provided along the circumference of the body portion; and a multi-functional wing portion formed to extend outward from the body portion above the elastic sealing wing portion, and provided along the circumference of the body portion.

Abstract: Disclosed is a container lid for vacuum sealing which generates negative pressure in the internal space of a container, which is provided by covering the open upper part of a container main body, and seals same. An annular packing is mounted so as to go around the inner surface of a lid main body, and a check valve is mounted in the inner part of the outer surface of the lid main body. The check valve generates negative pressure in the internal space of the container by allowing air inside the container to flow to the outside but preventing outside air from flowing into the container when a pressure difference occurs between the inside and outside of the container. A plurality of self catching protrusions are provided respectively at a plurality of points on the edges of the lid main body, and a plurality of locking members are mounted respectively and pivotably in sections adjacent to the plurality of self catching protrusions.

Abstract: Disclosed is a check valve which has an excellent sealing force compared with a conventional one by applying a relatively small force which lifts the edge of a valve body part even with a vacuum indicating part being sunk, and which can maintain a vacuum state for a longer time by preventing a ring shape from being dented at a low or high vacuum level.

Abstract: Disclosed is a rubber seal for a vacuum receptacle. The rubber seal is not released by a negative pressure developed in the vacuum receptacle. In addition, the rubber seal is excellent in sealing force, and has a body portion that does not bulge outward while being readily mounted on a lid body. The rubber seal includes: the body portion that surrounds the lateral side of an inner space and extends vertically; an elastic sealing wing portion formed to extend outward from the body portion and provided along the circumference of the body portion; and a multi-functional wing portion formed to extend outward from the body portion above the elastic sealing wing portion, and provided along the circumference of the body portion.