ALEXANDRIA, Va., June 9 -- United States Patent no. 12,285,646, issued on April 29.
"Adjustable dumbbell" was invented by Limin Huang (Yongkang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An adjustable dumbbell, comprising a dumbbell assembly, a dumbbell seat and dumbbell pieces, the dumbbell assembly comprises a dumbbell bar and connecting discs, which are provided with a positioning groove and a connecting block slidingly connected in the positioning groove, and the connecting disc is provided with an elastic component; the dumbbell assembly comprises a handle grip and gear blocks, and the glove and the gear block are fixed circumferentially, and the gear block has an outwardly pushing part and a...