US Patent 10328299 Adjustable exercise device

An adjustable barbell or dumbbell or exercise device includes a handle device having a handle bar engageable into grooves of a number of weight members, the weight members each having two pivotal arms, a link pivotally connected between the arms, a hand grip disposed on the handle bar, and a number of plates disposed on the handle bar and rotated in concert with the hand grip, the plates are engageable between the weight members, and the plates each include an engaging element for engaging with the link and for moving the arms toward each other to engage with the handle device when the plates and the hand grip are rotated relative to the handle bar, and for anchoring a selected number of weight members to the handle device with the plates.