Patent ID: 8317666

Claim:
A weightlifting apparatus comprising multiple disc weights, each disc weight comprising: a round base having: an annular sidewall; an annular flange formed on and protruding from the annular sidewall of the round base; at least one limiting rib, each one of the at least one limiting rib formed on the annular sidewall of the round base and having: a fence portion circumferentially formed on the annular sidewall; a stop portion formed between one end of the fence portion and the annular flange; and an opening formed between the other end of the fence portion and the annular flange, and being opposite to the stop portion; at least one sliding space, each one of the sliding space defined between the annular flange and a corresponding limiting rib; a center hole centrally formed through the round base; and multiple locating slots and a fixing slot formed in one side of the round base opposite to the annular flange; an engagement tab having: a slider slidably mounted in the fixing slot of the round base; and a lever mounted on the slider and protruding beyond the fixing slot; and a round cover having: a circular board; an annular wall formed on a perimeter of the circular board; an open chamber defined by the circular board and the annular wall; at least one recess formed in an inner wall of the annular wall and being equal to the at least one limiting rib in number; at least one locating pin, each one of the at least one locating pin formed on an inner wall of one of the at least one recess; a center hole centrally formed through the circular board; multiple locating holes formed through the circular board; and an arced hole formed through the circular board and having a curved end located at one end of the arced hole and communicating with the rest portion of the arced hole; wherein when the round cover is mounted on the round base, the at least one recess respectively corresponds to and aligns with the at least one limiting rib, an arc length of each one of the at least one recess is longer than that of each one of the at least one limiting rib, each one of the at least one locating pin is mounted in a corresponding sliding space through the opening of a corresponding limiting rib, the lever of the engagement tab is inserted in the curved end of the arced hole and is moved to one end of the arced hole opposite to the curved end so that the locating holes of the round cover respectively align with the locating slots of the round base.