Adjustable dumbbell

Abstract

An adjustable dumbbell device includes a handle bar having a bore formed in the handle bar, and having a slot formed in one end of the handle bar, a weight member includes an engaging member for engaging with the slot of the handle bar and for detachably attaching to the handle bar, the weight member includes an orifice for aligning with the bore of the handle bar, and a latch is slidably engaged into the bore of the handle bar, and extendible out of the handle bar and engageable into the orifice of the weight member for securing the weight member to the handle bar. One or more weight members are adjustably attached to the handle bar.

1 . An adjustable dumbbell assembly comprising:
 a handle bar including a first end, and including a bore formed in said handle bar, and including a slot formed in said first end of said handle bar and communicating with said bore of said handle bar, said slot of said handle bar being selected from a dovetail slot, and said slot of said handle bar being tilted including a relatively wider lower portion and a relatively narrower upper portion,   a weight member including an engaging member for engaging with said slot of said handle bar and for detachably attaching to said first end of said handle bar, said engaging member of said weight member being selected from a dovetail for engaging with said dovetail slot of said handle bar, said engaging member of said weight member being tilted including a relatively wider lower portion and a relatively narrower upper portion, and said weight member including an orifice formed therein for selectively aligning with said bore of said handle bar, and   a latch slidably engaged into said bore of said handle bar, and extendible out of said first end of said handle bar and engageable into said orifice of said weight member for securing said weight member to said handle bar, a post attached to said latch, a knob slidably engaged onto said post, and   said weight member including a passage formed therein and communicating with said orifice of said weight member for slidably engaging with said post.   
     
     
         2 . The adjustable dumbbell assembly as claimed in  claim 1 , wherein said handle bar includes a cavity formed therein and communicating with said bore of said handle bar, and said post is slidably engaged with said cavity of said handle bar. 
     
     
         3 . The adjustable dumbbell assembly as claimed in  claim 2 , wherein said knob includes a projection extended therefrom for selectively engaging with said cavity of said handle bar and for anchoring said knob and said latch to said handle bar. 
     
     
         4 . The adjustable dumbbell assembly as claimed in  claim 3 , wherein a spring biasing member is engaged onto said post and engaged with said knob for biasing said projection of said knob to engage with said cavity of said handle bar. 
     
     
         5 . The adjustable dumbbell assembly as claimed in  claim 3 , wherein said handle bar includes a seat formed therein and communicating with said cavity of said handle bar for selectively engaging with said projection of said knob. 
     
     
         6 . (canceled) 
     
     
         7 . The adjustable dumbbell assembly as claimed in  claim 1 , wherein said weight member includes a recess formed therein and communicating with said passage of said weight member. 
     
     
         8 . The adjustable dumbbell assembly as claimed in  claim 7 , wherein said weight member includes a seat formed in said weight member and communicating with said recess of said weight member. 
     
     
         9 - 10 . (canceled) 
     
     
         11 . The adjustable dumbbell assembly as claimed in  claim 1 , wherein said weight member includes a slot formed therein and communicating with said orifice of said weight member. 
     
     
         12 . The adjustable dumbbell assembly as claimed in  claim 1 , wherein said latch includes a guide channel formed therein, and said handle bar includes a stop attached to said handle bar and engaged with said guide channels of said latch for guiding and limiting said latch to slide relative to said handle bar and for preventing said latch from being disengaged from said handle bar.