US 12,228,554 B2
Elemental analysis device
Takahito Inoue, Kyoto (JP); and Hiroshi Uchihara, Kyoto (JP)
Assigned to HORIBA, LTD., Kyoto (JP)
Appl. No. 18/000,027
Filed by HORIBA, LTD., Kyoto (JP)
PCT Filed Sep. 10, 2021, PCT No. PCT/JP2021/033380
§ 371(c)(1), (2) Date Nov. 28, 2022,
PCT Pub. No. WO2022/054920, PCT Pub. Date Mar. 17, 2022.
Claims priority of application No. 2020-154064 (JP), filed on Sep. 14, 2020.
Prior Publication US 2023/0221292 A1, Jul. 13, 2023
Int. Cl. G01N 31/12 (2006.01)
CPC G01N 31/12 (2013.01) 13 Claims
OG exemplary drawing
 
1. An elemental analysis device that includes a first electrode and a second electrode between which a crucible containing a sample is nipped, and that heats the sample by applying a current between the first electrode and the second electrode, wherein
the second electrode includes
a second electrode main body that has a tip end having a substantially cylindrical shape,
a second electrode tip that is provided on a tip end surface of the second electrode main body,
a cap that nips the second electrode tip between the cap and the second electrode main body in such a manner that a part of the second electrode tip is exposed to an outside, and
a second screwing structure that includes a male thread and a female thread provided between the second electrode main body and the cap, and
the second screwing structure further includes a purge groove that extends in a pitch direction and that is provided as a cutout provided to a part of crests of a thread of at least one of the male thread and the female thread,
a stepped portion is provided to a tip end side of the second electrode main body, and
an O ring is provided inside a ring-shaped groove formed by the stepped portion and a rim of the cap when the cap is screwed onto the second electrode main body.