US 11,920,582 B2
Plunger, pump, and liquid analysis device
Satoru Tsubokura, Kyoto (JP)
Assigned to KYOCERA CORPORATION, Kyoto (JP)
Appl. No. 17/789,146
Filed by KYOCERA CORPORATION, Kyoto (JP)
PCT Filed Dec. 25, 2020, PCT No. PCT/JP2020/048848
§ 371(c)(1), (2) Date Jun. 24, 2022,
PCT Pub. No. WO2021/132604, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-237987 (JP), filed on Dec. 27, 2019.
Prior Publication US 2022/0364552 A1, Nov. 17, 2022
Int. Cl. F04B 53/14 (2006.01); F04B 15/00 (2006.01); F16J 1/00 (2006.01); G01N 30/32 (2006.01)
CPC F04B 53/14 (2013.01) [F04B 15/00 (2013.01); F16J 1/006 (2013.01); G01N 30/32 (2013.01); G01N 2030/326 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A plunger comprising:
a plunger main body section made of sapphire, having a pillar shape, and comprising a fitting hole that is non-penetrating and that extends in a central axis direction from one end portion of the plunger main body section;
a core portion inserted into the fitting hole and having a higher thermal conductivity than the sapphire; and
a joint layer interposed between
an inner peripheral surface and a bottom surface of the fitting bole of the plunger main body section and
an outer peripheral surface and a tip surface of the core portion, the joint layer being configured to bond the plunger main body section and the core portion.