Dumbbell with adjustable weight

Abstract

A dumbbell with adjustable weight includes a plurality of weighty disks each having an axial opening and an off-centered track extending partially across the axial opening. A bar has two ends received in the axial openings of the weighty disks and is formed with a plurality of spaced notches defined in each end thereof. The weighty disks are each provided with a positioning member movably connected thereto. Furthermore, each of the weighty disks is formed with a first retainer and the positioning member is formed with a second retainer cooperative with the first retainer for releasably retaining the positioning member in the first position once the positioning member is moved to this position, thereby locking the corresponding one of the weighty disks on the bar.

1 . A dumbbell with adjustable weight, comprising: 
 a plurality of weighty disks each having an axial opening and an off-centered track extending partially across said axial opening, a stop and a first retainer, which located in the off-centered track;    a bar having two ends received in said axial openings of said weighty disks, said bar being formed with a plurality of spaced notches defined in each of said ends;    said weighty disks each being provided with a positioning member movably connected thereto, said positioning member being movable along said off-centered track between a first position in which said positioning member is moved into and engaged with one of said spaced notches to lock corresponding one of said weighty disks on said bar, and a second position in which said positioning member is moved out and disengaged from said one of said spaced notches to unlock said corresponding one of said weighty disks from said bar; and    wherein each of said weighty disks is formed with a first retainer and said positioning member is formed with a second retainer cooperative with said first retainer for releasably retaining said positioning member in said first position once said positioning member is moved to said first position, thereby locking said corresponding one of said weighty disks on said bar.    
   
   
       2 . The dumbbell as claimed in  claim 1 , wherein said axial opening is configured as an elongated opening extending inwardly from an outer periphery of each of said weighty disks.  
   
   
       3 . The dumbbell as claimed in  claim 2 , wherein said bar is formed with a plurality of spaced necks defined at each of said ends, and wherein said spaced notches are defined in said necks between said chambers, respectively.  
   
   
       4 . The dumbbell as claimed in  claim 3 , wherein each of said spaced necks has a pair of opposed chamfers spaced apart at a distance suitable to be moved along to the interior of said elongated opening.  
   
   
       5 . The dumbbell as claimed in  claim 1 , wherein said positioning member has a longitudinal slot defined therein, and wherein a large-head stop has a shank extending through said longitudinal slot and connected to corresponding one of said weighty disks, thereby movably connecting said positioning member to said corresponding one of said weighty disks.  
   
   
       6 . The dumbbell as claimed in  claim 1 , wherein said first retainer comprises at least one spring-loaded member, and said second retainer comprises at least one recess into which said spring-loaded member may be snapped once said positioning member is moved to said first position.  
   
   
       7 . The dumbbell as claimed in  claim 1 , wherein said positioning member has an L-shaped configuration.