Fixed Weight Dumbbell Assembly

Abstract

An easy dumbbell assembly is presented herein, so that the weight heads are attached to handle bar in a very secured manner, without the process of welding, or the concern of cold weld. After a lock nut to tighten the assembly and eliminate the spin/rotate of the handle bar, a cap piece is pressed into the specially designed grooves on the weight heads, further securing the lock nut in place, for long period of extended use, reducing safety concern as a result of loose connection between weight heads and handle bar.

1 . Fixed weight dumbbell assembly, comprising: 
 a. handle bar having a spring, a spring pin and a lock pin, with axial opening on cut-off end of said handle bar made to contain thread lines;    b. a pair of weigh head each further having a ring of shoulder, a first ring of groove on first side of said shoulder and a second and third rings of groove on second side of said shoulder, with a hole formed through said shoulder;    c. a lock nut having matching washer piece, with thread lines formed to match those of said handle bar's thread lines in the axial opening; and,    d. a cap piece further having a ring of lip on its cylindrical base to fit said second ring of groove on said weight head and an angled edge to fit said third ring of groove.    
   
   
       2 . Dumbbell assembly of  claim 1  wherein said spring pin is so situated in radial direction of said handle bar to snuggly fit into said first ring of groove on said weight head when said handle bar is inserted into said first side of said center bore of weight head, having end of handle bar flush with said shoulder.  
   
   
       3 . Dumbbell assembly of  claim 2  wherein said washer piece is fit snuggly onto said shoulder, pressing down said lock pin through said hole on said shoulder, into a hole on the cut off edge of handle bar, so that said handle bar will not spin or turn relative to said weight head when said lock nut is tightened and said cap piece is pressed in place, causing said ring of lip to snuggly fit into said second ring of groove and said angled edge to fit into said third ring of groove.