Patent ID: 7429235
Filing Date: 2008-09-30
Classification: A63B

Abstract:
1. A dumbbell comprising: a hollow grip bar having a connecting end; a weight adjusting mechanism disposed at each end of the hollow grip bar and including a plurality of weights, each of said plurality of weights comprising an elongate notch having a receiving portion for receiving said weight carrier therethrough; and wherein there is no threaded engagement between the weight carrier and the weights during movement of the weight carrier through the receiving portion, wherein said weight carrier comprises a tubular member sleeved on said screw rod and formed with an inner thread that threadedly engages said screw rod, and wherein said weight adjusting mechanism further includes a limiting member secured to said connecting end of said grip bar, disposed outwardly of said grip bar, defining an axially extending central channel for extension of a weight supporting part of said weight carrier thereinto, and formed with an inner limiting groove extending axially and in spatial communication with said central channel, said weight-supporting part of said weight carrier being formed with a limiting protrusion that extends into said inner limiting groove in said limiting member so as to prevent rotation of said weight carrier upon rotation of said screw rod about said rotation axis.