US Patent 7077791 Weight selection methods and apparatus

An exercise dumbbell has at least one weight selector that is rotatable into engagement with various combination of weights at opposite ends of the handle. On a first embodiment, first and second weight selectors are rotatably mounted on opposite ends of a bar for independent rotation relative to the handle. On a second embodiment, first and second weight selectors are keyed to a common bar and rotated together therewith relative to the handle.