90 degree sweep elbow

Abstract

A tubular elbow member for connecting an angle cock and an intermediate hose on a pneumatic line of a railroad car. The tubular elbow has a threaded male end and a threaded female end each connected via a tubular portion having an inside radius of curvature of 2.5 to 3 times the inside diameter of the elbow.

What is claimed:  
     
         1 . A tubular elbow for interconnecting an angle cock and a pneumatic hose on a railroad car, the tubular elbow comprising: 
 a tubular threaded male end;    a tubular threaded female end; and    a curved tubular portion connecting the male and female ends and having a radius of curvature of 2.5 to 3 times the inside diameter of the tubular portion.    
     
     
         2 . The tubular elbow of  claim 1  wherein the curved tubular portion curves 90°.  
     
     
         3 . The tubular elbow of  claim 1  wherein the male threaded end includes an exterior hex nut surface which is the same size as a common wrench used for air end hose nipple hex nuts.  
     
     
         4 . The tubular elbow of  claim 1  wherein the device is made of ductile or malleable iron material.  
     
     
         5 . The tubular elbow of  claim 1  wherein the thread ends are standard NPT threads.  
     
     
         6 . The tubular elbow of  claim 1  wherein the ends and curved tubular portion comprise a monolithic structure.  
     
     
         7 . The tubular elbow of  claim 1  further including a yellow chromate and zinc plating.  
     
     
         8 . In a railcar having an angle cock mounted thereto, the angle cock being connected to a tubular elbow, the tubular elbow comprising: 
 a tubular threaded male end;    a tubular threaded female end; and    a curved tubular portion connecting the male and female ends and having a radius of curvature of 2.5 to 3 times the inside diameter of the tubular portion.    
     
     
         9 . The tubular elbow of  claim 8  wherein the curved tubular portion curves 90°.  
     
     
         10 . The tubular elbow of  claim 8  wherein the male threaded end includes an exterior hex nut surface which is the same size as a common wrench used for air end hose nipple hex nuts.  
     
     
         11 . The tubular elbow of  claim 8  wherein the device is made of ductile or malleable iron material.  
     
     
         12 . The tubular elbow of  claim 8  wherein the thread ends are standard NPT threads.  
     
     
         13 . The tubular elbow of  claim 8  wherein the ends and curved tubular portion comprise a monolithic structure.  
     
     
         14 . The tubular elbow of  claim 8  further including a yellow chromate and zinc plating.