US 12,420,382 B2
Magnetic chuck
Mizuki Ando, Tsukubamirai (JP); Sebastian Bialas, Egelsbach (DE); and Stephan Schweissing, Egelsbach (DE)
Assigned to SMC CORPORATION, Tokyo (JP)
Filed by SMC CORPORATION, Tokyo (JP)
Filed on May 24, 2023, as Appl. No. 18/322,995.
Claims priority of application No. 2022-087630 (JP), filed on May 30, 2022; and application No. 2023-080095 (JP), filed on May 15, 2023.
Prior Publication US 2023/0381928 A1, Nov. 30, 2023
Int. Cl. B23Q 3/00 (2006.01); B25B 11/00 (2006.01)
CPC B25B 11/002 (2013.01) 8 Claims
OG exemplary drawing
 
1. A magnetic chuck that attracts and retains a workpiece by a magnetic force of a permanent magnet, the magnetic chuck comprising:
a first cylinder and a second cylinder that are arranged in series with each other, wherein a first piston of the first cylinder includes the permanent magnet, a piston rod connected to the first piston is inserted into a second piston of the second cylinder, a stopper configured to abut against the second piston is fixed to the piston rod, and a position of the stopper relative to the piston rod is configured to be changed.