Patent ID: 8002680

Claim:
An adjustable dumbbell apparatus, comprising: a dumbbell comprising: at least one weight plate; and a selector selectively associated with the at least one weight plate to provide a desired weight load, the selector including a disc with at least one engagement portion; and a base configured to receive the dumbbell and including an engagement member, wherein: the engagement member and the at least one engagement portion of the disc are configured such that engagement of the engagement member with the at least one engagement portion secures the dumbbell to the base and disengagement of the engagement member from the at least one engagement portion unsecures the dumbbell from the base; when the dumbbell is secured to the base by engagement of the engagement member with the at least one engagement portion, a user is unable to readily remove the dumbbell from the base; and when the dumbbell is unsecured from the base by disengagement of the engagement member from the at least one engagement portion, the user may readily remove the dumbbell from the base.