Patent ID: 7172536

Claim:
An adjustable dumbbell comprising: a plurality of weights each including a slot formed therein, a bar including two end portions engageable into said slots of said weights, a plurality of latch rods slidably received and engaged within said weights respectively, and each including an inner end engageable into said slots of said weights respectively, and engageable with said bar, to anchor and latch a selected number of said weights to said bar, and to allow said selected weights to be moved in concert with said bar, said weights each including a spring member engaged onto said latch rod to bias and to force said inner ends of said latch rod to engage with and to latch said weights to said bar, said latch rods each including a stop extended therefrom for engaging with said spring member, and said weights each including a passage formed therein and communicating with said slot thereof, and a peripheral rib extended into said passage thereof to form an aperture having a reduced diameter, and to engage with said stop of said latch rod, and to limit said latch rod to move relative to said weight.