公开(公告)号：US11746777B2

公开(公告)日：2023-09-05

申请号：US16768660

申请日：2018-06-20

Applicant: SHIMADZU CORPORATION

Inventor： Shinya Imamura ,  Keisuke Ogawa

IPC: F04B53/10 ,  F16K31/06 ,  F04B7/00 ,  F04B49/22 ,  F16K31/08 ,  G01N30/32

CPC classification number: F04B53/1087 ,  F04B7/0076 ,  F04B53/1002 ,  F16K31/0655 ,  F04B49/22 ,  F16K31/08 ,  G01N30/32 ,  G01N2030/326

Abstract: A liquid sending device includes a plunger pump, which performs an intake operation of liquid to and a discharge operation of liquid from a pump chamber and in which pressure in the pump chamber in a case where the intake operation is performed is lower compared to a case where the discharge operation is performed, a check valve that is provided at an inlet port, has a spherical valve element and a valve seat, and passively operates according to the pressure in the pump chamber in such a direction that the valve element is seated on or detached, a pressure sensor that detects the pressure, and an attachment detector that compares the pressure with a preset threshold value and detect attachment of the valve element to the valve seat in a case where the pressure in the pump chamber is equal to or lower than the threshold value.

公开(公告)号：US20140260565A1

公开(公告)日：2014-09-18

申请号：US14349945

申请日：2012-12-12

Applicant: SHIMADZU CORPORATION

Inventor： Shinya Imamura ,  Yoshiaki Maeda

IPC: F04B53/02 ,  G01N30/28 ,  F04B53/16

CPC classification number: F04B53/02 ,  F04B13/00 ,  F04B53/143 ,  F04B53/16 ,  F04B53/164 ,  G01N30/28 ,  G01N30/32 ,  G01N2030/326

Abstract: A recess into which a protrusion of a plunger seal is to be fitted is provided at a part of a pump head where a plunger is to be inserted into a pump chamber. The plunger seal seals the pump chamber by an outer circumferential surface of the protrusion coming into close contact with an inner circumferential surface of the recess and a surface of a flange on the side of the protrusion coming into close contact with a circumferential edge surface of the recess of the pump head due to the protrusion being fitted into the recess and being pressed by a backup ring toward the pump chamber. The inner circumferential surface of the recess of the pump head and the circumferential edge surface of the recess are covered by a film of an acid-resistant material.

Abstract translation: 在柱塞要插入泵室的泵头的一部分上设置有要装配柱塞密封件的突起的凹槽。 柱塞密封件通过突出部的外周面与凹部的内周面紧密接触来密封泵室，突出部侧的凸缘​​的表面与凸缘的周向边缘表面紧密接触 由于突起被装配到凹部中并被支撑环压向泵室，所以泵头的凹部。 泵头的凹部的内周面和凹部的周向边缘表面被耐酸材料的膜覆盖。

公开(公告)号：US12146868B2

公开(公告)日：2024-11-19

申请号：US17778832

申请日：2020-11-05

Applicant: SHIMADZU CORPORATION ,  Kyoto University

Inventor： Jun Yanagibayashi ,  Shinya Imamura ,  Kenichi Yasunaga ,  Yasushi Ishihama ,  Koshi Imami ,  Tomoya Niinae ,  Yumi Komori

IPC: G01N30/32 ,  G01N30/14 ,  G01N30/02

Abstract: A pump unit includes a pump and a metal ion trap. The pump includes a metal member that comes into contact with a mobile phase. The pump pumps a mobile phase through a flow path. The metal ion trap includes a filter element. The filter element includes a metal ion retention structure for retaining metal ions by interacting with the metal ions included in a mobile phase. The filter element is provided in the flow path for a mobile phase pumped by the pump. The pump unit may be provided in a chromatograph.

公开(公告)号：US11307179B2

公开(公告)日：2022-04-19

申请号：US16648077

申请日：2017-10-23

Applicant: SHIMADZU CORPORATION

Inventor： Jun Yanagibayashi ,  Shinya Imamura ,  Keisuke Ogawa ,  Masataka Nikko ,  Shinichi Fujisaki

IPC: G01N30/32 ,  F04B49/20 ,  G01N30/34 ,  F04B23/06 ,  F04B49/06 ,  B01D15/16 ,  F04B11/00 ,  G01N30/02

Abstract: The liquid feeding device includes a discharge speed calculation part configured to calculate a discharge speed v of the plunger pump so that a converted value LATM under an atmospheric pressure of a flow rate LPRE of the mobile phase discharged to the discharge channel from the pump part becomes a set flow rate LSET using a volume V of the mobile phase in the pump chamber of the closing pump immediately before the precompression process is started, a volume ΔV reduced due to the precompression process of the mobile phase in the pump chamber of the closing pump, and a feeding pressure P; and a discharge operation controller configured to control a discharge speed of the plunger pump to a discharge speed v calculated by the discharge speed calculation part.

公开(公告)号：US10514028B2

公开(公告)日：2019-12-24

申请号：US15756746

申请日：2015-12-01

Applicant: Shimadzu Corporation

Inventor： Shinya Imamura

IPC: F04B49/06 ,  F04B11/00 ,  F04B49/20 ,  F04B13/00 ,  F04B1/02 ,  G01N30/32 ,  G01N30/36 ,  F04B23/06 ,  F04B17/03

Abstract: A liquid feeding apparatus has a primary side pump and a secondary side pump, and an outlet part of the primary side pump and an inlet part of the secondary side pump are connected to each other via a check valve. A temporary side pump pressure sensor for detecting the pressure inside the pump chamber of the primary side pump and a secondary side pressure sensor for detecting the pressure inside the pump chamber of the secondary side pump are provided. The signal of the primary side pressure sensor and the signal of the secondary side pressure sensor are acquired after the suction operation of the primary side pump is terminated and before the discharge operation of the secondary side pump is terminated.

公开(公告)号：US10227977B2

公开(公告)日：2019-03-12

申请号：US15180618

申请日：2016-06-13

Applicant: SHIMADZU CORPORATION

Inventor： Shinya Imamura

IPC: F04B53/04 ,  F04B53/16 ,  F04B53/00 ,  F04B53/02 ,  F04B53/14 ,  F04B9/02

Abstract: A plunger seal is mounted on the pump head, has a through hole for allowing penetration of the plunger, and holds the outer circumferential surface of the plunger and also seals an opening of the pump chamber. A backup ring is mounted on the pump head by being interposed between the plunger seal and the tip end surface of the pump body. The backup ring has a through hole, for allowing penetration of the plunger, formed in a manner not allowing the plunger seal to enter a gap to the outer circumferential surface of the plunger, and also has a liquid passage element for allowing the cleaning liquid in the cleaning space to reach the plunger seal through the through hole.