Adjustable dumbbell and system

Abstract

An adjustable weightlifting device having selectable weights. The adjustable weightlifting device allows users to select a desired number of weight plates, and then couples the selected weight plates to retention members disposed in the handle of the device.

1 . A weight lifting device, comprising:
 a handle having end portions;   at least one retention member slidably disposed within said handle, said retention member longitudinally movable relative to said handle;   a locking mechanism disposed on at least one of said end portions of said handle, said locking mechanism having a movable pin disposed therein, said movable pin engaged with said retention member preventing longitudinal movement of said retention member when in a locked position; and   a plurality of weights removably attached to said retention member.   
     
     
         2 . The weight lifting device of  claim 1 , wherein each said weights includes a protrusion on a first side thereof and groove on a second side thereof, said groove adapted to receive said protrusion from an adjacent weight when in a stacked position. 
     
     
         3 . The weight lifting device of  claim 1 , wherein said retention member comprises a rod, an attachment member, and retention pin, said rod preventing rotation of said retention member relative to said handle. 
     
     
         4 . The weight lifting device of  claim 1 , wherein each said weight includes a channel, a vertical guide, and at least one retention tab disposed within said vertical guide. 
     
     
         5 . The weight lifting device of  claim 1 , further comprising a support having at least one receptacle for receiving said locking mechanism disposed therein, said receptacle having a locking and an unlocking channel. 
     
     
         6 . The weight lifting device of  claim 5 , wherein said locking channel forces said movable pin into a locked position when said locking mechanism is removed from said receptacle. 
     
     
         7 . The weight lifting device of  claim 1 , wherein the movable pin is horizontal and biased toward the locked position. 
     
     
         8 . The weight lifting device of  claim 5 , wherein said unlocking channel forces said movable pin into an unlocked position when said locking mechanism is placed in said receptacle so as to allow longitudinal movement of said retention member. 
     
     
         9 . A weight lifting device, comprising:
 a handle having end portions,   at least one retention member slidably disposed within said handle, said retention member longitudinally movable relative to said handle,   a plurality of weights removably attached to said retention member; and   a locking mechanism immovably interposed between said at least one of said end portions of said handle and said plurality of weights, said locking mechanism preventing the longitudinal movement of said retention member when in the locked position.   
     
     
         10 . The weight lifting device of  claim 9 , wherein each said weight has a first plate and a second plate. 
     
     
         11 . The weight lifting device of  claim 9 , wherein each said plate has plate tabs extending therefrom and plate apertures, said plate tabs adapted to nest within said plate apertures of an adjacent weight plate. 
     
     
         12 . The weight lifting device of  claim 9 , wherein said retention member comprises a rod, an attachment member, and a retention pin, wherein said retention pin further includes a locking element preventing movement of said retention pin relative to said attachment member when in the locked position. 
     
     
         13 . The weight lifting device of  claim 12 , wherein said attachment member is attached to and extends substantially perpendicular from said rod. 
     
     
         14 . The weight lifting device of  claim 9 , further comprising a support having at least one receptacle for receiving said locking mechanism disposed therein, said receptacle having a locking and an unlocking channel. 
     
     
         15 . The weight lifting device of  claim 9 , wherein said locking mechanism includes a moveable pin disposed therein, said movable pin engaging said retention member preventing longitudinal movement of said retention member when in a locked position. 
     
     
         16 . The weight lifting device of  claim 15 , wherein when said pin is in the unlocked position it prevents removal of the weight lifting device from a base. 
     
     
         17 . A weight lifting device, comprising:
 a base, said base including plate rests,   an adjustable dumbbell adapted to be supported by said base, comprising:
 a handle having end portions, 
 at least one retention member slidably disposed within said handle, said retention member longitudinally movable relative to said handle, 
 a plurality of weights removably attached to said retention member and adapted to rest on said plate rests when not in use; and 
 a locking mechanism immovably interposed between said at least one of said end portions of said handle and said plurality of weights, said locking mechanism preventing the longitudinal movement of said retention member when in the locked position. 
   
     
     
         18 . The weight lifting device of  claim 17 , further comprising protrusions on said plate rests adapted to align said plurality of weight plates when not in use. 
     
     
         19 . The weight lifting device of  claim 17 , further comprising a tray tab extending from said plate rest, said tray tab preventing removal of said adjustable dumbbell from said base when said locking mechanism is in the unlocked position. 
     
     
         20 . The weight lifting device of  claim 17 , further comprising a locking tab associated with said retention member.