Patent ID: 8894553
Filing Date: 2014-11-25
Classification: A63B

Abstract:
1. A method for adjusting the weight of a dumbbell of the type including: a bar that extends generally axially between opposing end regions, a weight plate mass mounted about the bar at each end region, said mounted weight plate masses being retained at the respective end regions to define a handle region axially inward of the end regions that can be gripped by a user during exercise movement of the dumbbell, and said weight plate masses being mechanically secured at a respective end region to the dumbbell, wherein the method comprises the steps of: mounting an added weight plate axially outward of the weight plate mass at each end region so that a magnetic pole region carried by the added weight plate is magnetically coupled to the weight plate mass to magnetically secure the added weight plate to the dumbbell via a magnetically-securing coupling force, and rotating the added weight plate with respect to the weight plate mass, when decoupling is desired, to bring the carried magnetic pole region sufficiently into alignment with a magnetic pole region of like polarity carried by the weight plate mass so that the added weight plate is magnetically repelled from the weight plate mass.