Closure ring assembly for steel drums

Abstract

Interlocking end lugs are provided in an improved closure split ring assembly for steel drums. The interlocking end lugs facilitate the tangential alignment of the ring to seal the lid on the drum and lock it in place.

1 . An improved closure ring assembly for securing a lid to a cylindrical drum comprising 
 an annular closure split ring having first and second end lugs, said first end lug having an unthreaded hole and said second threaded lug having a threaded hole,    a tie bolt having a head and a threaded cylindrical end for insertion through said first unthreaded lug to engage said second threaded lug for drawing the lugs together,    said first and second lugs each having an end face for interlocking said lugs and tangentially aligning the annular closure ring to close the ring for sealing the lid on the drum.    
     
     
         2 . The assembly of  claim 1  wherein said first lug end face has a conical shoulder integrally formed therein and the second threaded lug end face is tapered to receive the conical shoulder such that when the tie bolt draws the lugs into successive engagement there is provided a guided wedging action and tangential alignment of the ring ends to seal the drum.  
     
     
         3 . The assembly of  claim 1  wherein the bolt head has a tapered shoulder for cooperating with a tapered face of the first unthreaded lug opposite its end face such that when the tie bolt draws the lugs into engagement, the tapered bolt head and cooperating unthreaded lug facilitate the successive engagement of the lugs to provide a guided wedging action and tangential alignment of the ring ends to seal the drum.  
     
     
         4 . The assembly of  claim 3  wherein said bolt head shoulder is conically shaped.  
     
     
         5 . The assembly of  claim 3  wherein the tapered face of the first unthreaded lug is conically shaped.  
     
     
         6 . An improved closure ring assembly for securing a lid to a cylindrical drum comprising 
 an annular closure split ring having first and second end lugs, said first end lug having a tapered face with an unthreaded hole and said second threaded lug having a threaded hole,    a tie bolt having a head and a threaded cylindrical end for insertion through said first unthreaded lug to engage said second threaded lug for drawing the lugs together, wherein the bolt head has a tapered shoulder for cooperating with the tapered face of the first unthreaded lug,    said first and second lugs each having an end face for interlocking said lugs, wherein said first lug end face has a conical shoulder integrally formed therein opposite its tapered face and the second threaded lug end face is tapered to receive the conical shoulder such that when the tie bolt draws the lugs into successive engagement there is provided a guided wedging action and tangential alignment of the ring ends to seal the drum.