US 12,345,618 B2
Flow path device for separating target particles in a fluid
Masamitsu Sasahara, Omihachiman (JP); and Jumpei Nakazono, Kirishima (JP)
Assigned to KYOCERA CORPORATION, Kyoto (JP)
Appl. No. 17/912,852
Filed by KYOCERA CORPORATION, Kyoto (JP)
PCT Filed Mar. 17, 2021, PCT No. PCT/JP2021/010733
§ 371(c)(1), (2) Date Sep. 20, 2022,
PCT Pub. No. WO2021/193265, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 2020-052362 (JP), filed on Mar. 24, 2020.
Prior Publication US 2023/0152191 A1, May 18, 2023
Int. Cl. G01N 1/22 (2006.01); G01N 15/00 (2006.01); G01N 15/06 (2006.01)
CPC G01N 1/2205 (2013.01) [G01N 2015/0046 (2013.01); G01N 15/06 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A flow path device, comprising:
a first device including a groove and an entry hole aligned with the groove in a thickness direction of the flow path device;
a second device including a first surface, a second surface opposite to the first surface and in contact with the first device, and a first hole extending through and between the first surface and the second surface, the first hole being continuous and aligned with the entry hole in the thickness direction; and
a third device including a third surface in contact with the first surface, a second hole open in the third surface, the second hole being continuous and aligned with the first hole in the thickness direction, and a flow path directly connected with the second hole and open in the third surface,
wherein as viewed in a first direction from the first surface to the second surface along the thickness direction,
the second hole has a diameter greater than a dimension of the flow path in a third direction orthogonal to a second direction in which the flow path extends,
the first hole has a diameter greater than the diameter of the second hole,
the second hole has a center surrounded by the first hole, and
the flow path intersects with the first hole at not more than one point or does not intersect with the first hole.