Patent ID: 8777820

Claim:
An adjustable weight assembly comprising: a weight device connected to a base and having at least one rail, a movable member and multiple weights, the movable member connected to a rod and being applied by a force from a force applying unit so as to move along the at least one rail, the rod having multiple through holes defined therethrough and each weight having a latitude hole and a longitudinal hole which communicates with the latitude hole, each latitude hole having a pin extending therethrough, the rod extending through the longitudinal holes, the through holes located corresponding to the latitude holes, and at least one adjustable device having a driving unit, a movable part and multiple pivotal members, the driving unit driving the movable part along the at least one rail, the movable part having a lever, each weight pivotably connected to one of the pivotal members and each pivotal member having a first portion and a second portion, when the movable part moves toward a first end of the at least one rail, the lever driving the second portion so that the pivotal member pivots from a first angle to a second angle, the pin being pushed by the pivotal member and inserted into the through hole, when the movable part moves toward a second end of the at least one rail, the lever driving the second portion so that the pivotal member pivots from the second angle to the first angle, the pin being removed from the through hole by the pivotal member.