Patent ID: 7578771

Claim:
A weight selection and adjustment system for a selectorized dumbbell, which comprises: (a) a selectorized dumbbell, which comprises: (i) a stack of nested left weight plates and a stack of nested right weight plates; (ii) a handle having a left end and a right end; and (iii) a movable selector having a plurality of different adjustment positions in which the selector may be disposed, wherein the selector is configured to couple selected numbers of left weight plates to the left end of the handle and selected numbers of right weight plates to the right end of the handle with the selected numbers of coupled weight plates differing depending upon the adjustment position in which the selector is disposed, thereby allowing a user to select for use a desired exercise weight to be provided by the selectorized dumbbell; and (b) an electric motor that is operatively connected to the selector at least whenever a weight adjustment operation takes place, wherein the electric motor when energized from a source of electric power physically moves the selector into the adjustment position corresponding to the desired exercise weight that was selected for use by the user.