Patent ID: 7121988

Claim:
An adjustable weight-training apparatus, comprising: a plurality of weight plates, each of said weight plates having a protrusion, said weight-training apparatus having longitudinally opposing end portions, each of said ends portions having longitudinally outer and inner groups of said weight plates; and a rotatable bar comprising an inner control shaft and an outer control shaft, said inner control shaft configured to rotate within and independently of said outer control shaft and said rotatable bar configured to rotate within central holes of said weight plates: said inner control shaft having a first plurality of longitudinally spaced lobes, said inner control shaft being rotatable to position selected ones of said first plurality of lobes in engagement with said protrusions of selected weight plates of at least one of said outer groups of weight plates to secure said selected weight plates of said outer groups to said inner control shaft; and said outer control shaft having a second plurality of longitudinally spaced lobes, said outer control shaft being rotatable to position selected ones of said second plurality of lobes in engagement with said protrusions of selected weight plates of at least one of said inner groups of weight plates to secure said selected weight plates of said inner groups to said outer control shaft.