Patent ID: 6149558
Filing Date: 2000-11-21
Classification: A63B

Abstract:
A dumbbell adjustable in weight, said dumbbell comprising:a carrying seat having two plates parallel to each other, and a plurality of rods fastened between said two plates;said two plates being provided at the top of an outer side thereof with two hooked portions;a plurality of weighted blocks located respectively in equal number at said outer side of each of said two plates;each of said weighted blocks having a main body which is provided with two connection portions opposite in location to each other;said connection portions of said weighted blocks being located at various levels on said main body to enable said weighted blocks to be held together side by side such that said hooked portions of said two plates are engaged with said connection portions of said weighted blocks contiguous to said two plates; anda selection device mounted on said carrying seat for enabling a predetermined number of said weighted blocks to be selectively coupled with said carrying seat;wherein each of said two plates are provided with a first through hole which is provided in an inner edge of an outer end thereof with at least one restraint surface;wherein said main body of said weighted blocks is provided with a second through hole corresponding in location to said first hole; andwherein said selection device comprises a grip rod rotatably disposed between said first through holes of said two plates and provided at both end thereof with a threaded hole extending along the direction of a longitudinal axis of said grip rod whereby said two threaded holes of said grip rod are opposite in rotation direction to each other, said selection device further comprising two pins which are engaged at one end thereof with said threaded holes of said grip rod and are received at another end thereof in said first through holes of said two plates whereby each of said two pins are provided with at least one press surface pressing respectively against said restraint surface of said first through hole.