Double-walled metallic vacuum container

Abstract

A metallic double-walled vacuum container is provided which improves heat insulation and resistance to vibration. It has a metallic inner shell and an outer shell. The end face of the inner shell is constricted so as to rise inwardly. The inner end of a mouth pipe is inserted into and joined to the constricted portion to form a mouth portion of the inner shell and the outer end of the mouth pipe is joined to the outer shell.

What is claimed is:  
     
         1 . A metallic double-walled vacuum container comprising: 
 a metallic inner shell having a mouth portion;    a metallic outer shell having first and second generally axially-facing end faces facing in generally axially opposite directions, a mouth portion provided at said first axially-facing end face, a shoulder provided at an outer periphery of said first axially-facing end face, and a generally radially outwardly-facing trunk portion joined to said first axially-facing end face at said shoulder and extending axially from said first axially-facing end face to said second axially-facing end face;    wherein said mouth portion of said inner shell is joined to said mouth portion of said outer shell;    wherein a space is formed between said inner and outer shells;    wherein a plug member is fitted in said mouth portion of said inner shell;    wherein a presser plate is mounted in abutment with said plug member;    wherein at least one bracket is fixed to said radially outwardly-facing trunk portion of said outer shell radially outwardly of said shoulder; and    wherein said presser plate is fixed with and supported by said at least one bracket.    
     
     
         2 . The metallic double-walled vacuum container as claimed in  claim 1 , wherein said space formed between said inner and outer shells is an evacuated space.  
     
     
         3 . The metallic double-walled vacuum container as claimed in  claim 1 , wherein said first axially-facing end face of said outer shell extends outwardly from said mouth portion of said outer shell to said shoulder in a radially outward direction that is oblique axially toward said second axially-facing end face.  
     
     
         4 . The metallic double-walled vacuum container as claimed in  claim 1 , wherein said plug member has a liquid inlet and a liquid outlet formed therein, and said plug member is mounted in said mouth portion of said inner shell so as to plug said mouth portion of said inner shell.  
     
     
         5 . The metallic double-walled vacuum container as claimed in  claim 1 , wherein said at least one bracket comprises plural brackets; and 
 said presser plate comprises a plate portion and a plurality of legs extending radially from said plate portion;    wherein said brackets are coupled to said legs of said presser plate, respectively.    
     
     
         6 . The metallic double-walled vacuum container as claimed in  claim 1 , wherein said at least one bracket has a radially inner end and a radially outer end, said radially inner end being coupled to said presser plate, and said radially outer end being fixed to said radially outwardly-facing trunk portion.  
     
     
         7 . The metallic double-walled vacuum container as claimed in  claim 1 , wherein said at least one bracket comprises an L-shaped bracket having a radially inner end that extends radially and a radially outer end that extends axially, said radially inner end being coupled to said presser plate, and said radially outer end being fixed to said radially outwardly-facing trunk portion.  
     
     
         8 . The metallic double-walled vacuum container as claimed in  claim 1 , wherein said at least one bracket comprises a plurality of L-shaped brackets each having a radially inner end that extends radially and a radially outer end that extends axially, said radially inner end being coupled to said presser plate, and said radially outer end being fixed to said radially outwardly-facing trunk portion.