Patent ID: 8763833
Filing Date: 2014-07-01
Classification: B21D,Y10T

Abstract:
1. A vacuum vessel comprising: a pair of bent members formed by bending two metal plates and connected to each other to form a closed space inside the vacuum vessel; a seal member which seals connecting portions of said pair of bent members and is configured as one looped seal member; a structure arranged in the closed space to abut against an inner surface of the closed space formed by said pair of bent members; and a fastening member which connects the connecting portions of said pair of bent members, wherein the seal member is formed along a bend of each of the pair of bent members for providing a vacuum seal, the seal member is pressed to said structure and said pair of bent members in accordance with a fastening force provided by said fastening member, and the connecting portions are sealed by the pressed seal member; wherein one bent member of said pair of bent members has connecting bent portions bent toward an outer side of the vacuum vessel so as to be perpendicular to an outer surface of the vacuum vessel, and the connecting bent portions are used to connect said pair of bent members via said fastening member.