Patent attributes
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.
