US Patent 7762933 Weight-adjustable kettle-shaped dumbbell

A weight-adjustable kettle-shaped dumbbell includes a body. The inner bottom of the body is hollow. With a selector unit, the body is able to hang a desired number of weight pieces for changing the weight of the dumbbell. The selector unit links a cable member to move upward or downward with an operating member for changing the inner and outer positions of specific selection boards in the body so as to attach relative weight pieces to the body. The kettle-shaped dumbbell of the present invention is adjustable in weight for the user's demand.