ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,420,382, issued on Sept. 23, was assigned to SMC Corp. (Tokyo).
"Magnetic chuck" was invented by Mizuki Ando (Tsukubamirai, Japan), Sebastian Bialas (Egelsbach, Germany) and Stephan Schweissing (Egelsbach, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A magnetic chuck includes a first cylinder and a second cylinder that are arranged in series with each other. A first piston of the first cylinder includes a permanent magnet, and a piston rod connected to the first piston is inserted into a second piston of the second cylinder. A stopper that can abut against the second piston is fixed to the piston rod. The position of the stopper can be change...