US 12,233,287 B2
Particle beam treatment apparatus
Teruaki Oonishi, Ehime (JP)
Assigned to Sumitomo Heavy Industries, Ltd., Tokyo (JP)
Filed by SUMITOMO HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed on Feb. 24, 2022, as Appl. No. 17/679,340.
Claims priority of application No. 2021-028634 (JP), filed on Feb. 25, 2021.
Prior Publication US 2022/0266062 A1, Aug. 25, 2022
Int. Cl. A61N 5/10 (2006.01)
CPC A61N 5/1081 (2013.01) [A61N 5/1048 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A particle beam treatment apparatus that irradiates an irradiation target with a particle beam, the apparatus comprising:
a rotary shaft including a hollow portion;
an electromagnet that controls the particle beam in the hollow portion, the rotary shaft being rotatable by a power source;
a support portion that rotatably supports the rotary shaft; and
an irradiator that is connected to one end of the rotary shaft and irradiates the irradiation target with the particle beam; and
a first bearing provided on the other end of the rotary shaft, the hollow portion being accessible to a worker through an inner peripheral side of the first bearing,
wherein the rotary shaft includes a first opening portion provided on the other end of the rotary shaft.