Member and tube assembly

Abstract

A tube and fitting assembly is made by the method of relatively moving a tube into an internal bore in a fitting with the internal bore extending end-to-end in the fitting, longitudinally compressing the tube to radially expand it into engagement with the wall of the internal bore, internally threading either the tube or the fitting and with the threads being adapted to receive a second member until it is sealed fluid-tight against the tube and there is therefore no need for a fluid-tight seal between the tube and the first fitting.

What is claimed is:  
     
       1. A tube and fitting assembly comprising a fitting having first and second ends and an internal bore extending through the fitting from end-to-end; 
       a shoulder in said fitting bore;  
       a tube closely engaging the bore and extending at least partially through the bore and being longitudinally compressed to be radially expanded into tight engagement with the bore of the fitting and with said shoulder;  
       an internal thread in one of said tube and fitting; and  
       a second member threaded into said threads and sealed against said tube.  
     
     
       2. The assembly as set forth in claim  1 , wherein said internal thread is in said fitting. 
     
     
       3. The assembly as set forth in claim  1 , wherein said internal thread is in said tube. 
     
     
       4. The assembly as set forth in claim  3 , wherein the internally threaded portion of the tube is an expanded portion. 
     
     
       5. The assembly as set forth in claim  3 , wherein the internally threaded portion of the tube is a reduced diameter portion. 
     
     
       6. The assembly as set forth in claim  3 , wherein an end of the tube is conically flared, and the second member makes a fluid-tight seal at said flare. 
     
     
       7. The assembly as set forth in claim  6 , wherein the flared end of the tube is at an end of the fitting. 
     
     
       8. The assembly as set forth in claim  1 , wherein said second member is an orifice fitting having a longitudinal orifice smaller than the inside diameter of said tube. 
     
     
       9. The assembly as set forth in claim  1 , including an enlarged recess in said internal bore; 
       said shoulder being formed by said enlarged recess; and  
       said radial expansion of the tube at least partially filling said recess and engaging said shoulder.  
     
     
       10. The assembly as set forth in claim  1 , wherein the end of the tube is flared intermediate the length of the internal bore. 
     
     
       11. A tube and fitting assembly comprising: 
         a fitting having first and second ends and an internal bore extending through said fitting from end - to - end;    
       
         a tube closely engaging said bore and extending at least partially through said bore and being longitudinally compressed to be radially expanded into tight engagement with said bore of said fitting;  
       
       
         threads in said tube; and  
       
       
         a second member threaded into said threads and sealed against said tube. 
       
     
     
       12. The assembly as set forth in claim  11 , wherein said tube has a radially expanded portion at the first end of the fitting that is larger than said internal bore. 
     
     
       13. The assembly as set forth in claim  12 , wherein an end of said tube is conically flared, and said second member makes a fluid- tight seal at said flare.   
     
     
       14. A tube and fitting assembly comprising: 
         a fitting having first and second ends and an internal bore extending through said fitting from end - to - end;    
       
         a tube closely engaging said bore and extending at least partially through said bore and having a radially expanded portion at said first end of said fitting and larger than said internal bore and an end of said tube is conically flared;  
       
       
         an internal thread in said fitting; and  
       
         a second member threaded into said threads and sealed against said tube and which makes a fluid - tight seal at said conically flared end.   
     
     
       15. The assembly as set forth in claim  14 , wherein said tube is longitudinally compressed to be radially expanded into tight engagement with said bore of said fitting.