Abstract: The present invention relates to a vacuum container. The vacuum container includes a piston member linearly movably disposed in a receiving portion which is formed at the vacuum container and has a first outlet and provided with a second outlet, an elastic member disposed in the piston member, a first valve plate disposed in the receiving portion and adapted to open or close the first outlet, a second valve plate disposed at the piston member and adapted to open or close the second outlet, a separation preventing plate mounted in the receiving portion and preventing separation of the piston member, and a unit for pressuring the first valve plate which is mounted in the receiving portion and is adapted to close the first outlet by pressurizing the first valve plate if the piston member descends and is caught by and fixed to the separation preventing plate. Thereby, vacuum state can be continuously maintained in the vacuum container.

Abstract: The present invention relates to a vacuum container. The vacuum container includes a piston member linearly movably disposed in a receiving portion which is formed at the vacuum container and has a first outlet and provided with a second outlet, an elastic member disposed in the piston member, a first valve plate disposed in the receiving portion and adapted to open or close the first outlet, a second valve plate disposed at the piston member and adapted to open or close the second outlet, a separation preventing plate mounted in the receiving portion and preventing separation of the piston member, and a unit for pressuring the first valve plate which is mounted in the receiving portion and is adapted to close the first outlet by pressurizing the first valve plate if the piston member descends and is caught by and fixed to the separation preventing plate. Thereby, vacuum state can be continuously maintained in the vacuum container.

Abstract: A vacuum pump includes a case having a first discharge port in the lower membrane thereof, a piston coupled to the case to enable a vertical movement and having a second discharge port in the upper membrane thereof, a first opening/closing member and a second opening/closing member opening/closing the first discharge port and the second discharge port, respectively, based on the vertical movement of the piston, an elastic member placed between the case and the piston, a first separation preventing member coupled to the upper part of the case and preventing the piston from being separated, a second separation preventing member provided inside the case and preventing the first opening/closing member from being separated, a third separation preventing member coupled to the upper part of the piston and preventing the second opening/closing member from being separated, and a first packing member coupled to the lower part of the case.