Patent ID: 6224520
Filing Date: 2001-05-01
Classification: A63B

Abstract:
A dumbbell comprising a bar, a soft cushion laid around said bar, a vertical stop disc formed at two ends of said bar, said vertical stop disc having a circular projection extending outward, said circular projection having an annular groove, said bar having an end cap closing up respectively each of the two ends of said bar, each said end cap having a convex outer side and a tubular projection extending inward from a inner center surface of said convex outer side, said tubular projection having an annular projection formed on an inner surface to engage with said annular groove of said annular projection of said bar, a support space formed between each said end cap and said vertical circular disc for a weight to fit around said support space, said weights respectively made of an elastic annular cloth bag wrapping iron sand of a certain weight therein and having flexibility to change their shape to fit around said support space by force, such that a user may replace said weights with other ones of different weight volume, said weights not producing sound because of the soft flexible bodies of said weights dispersing shock of striking the ground surface when said dumbbell falls down on the ground, said dumbbell not hurting the ground surface, said weights, a user or a person around, and thus quite safe to use.