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公开(公告)号：US12123533B2
公开(公告)日：2024-10-22
申请号：US17092381
申请日：2020-11-09
Applicant: SHIMADZU CORPORATION
Inventor： Jun Yanagibayashi , Kenichi Yasunaga , Shinji Tanaka , Shinya Imamura , Ryo Hosono , Hiromu Yamasaki , Koshi Abe
CPC classification number: F16L47/02 , B01L3/561 , B01L3/563 , B29C57/005 , F16L13/007 , F16L13/02 , F16L47/14 , G01N30/6026 , B01L2200/12 , B01L2200/141
Abstract: A resin tube is prepared. Further, a formation tool having a pressing surface and a projection that projects from the pressing surface and is insertable into the resin tube is prepared. The projection of the formation tool is inserted from an end of the resin tube into the resin tube. The pressing surface of the formation tool is pressed against an end surface of the resin tube. Thermal energy is applied to the end of the resin tube, whereby a shape of the pressing surface of the formation tool is transferred to the end surface of the resin tube, and the end of the resin tube is formed into a flange shape.
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公开(公告)号：US11319951B2
公开(公告)日：2022-05-03
申请号：US16762399
申请日：2017-11-29
Applicant: SHIMADZU CORPORATION
Inventor： Jun Yanagibayashi , Shinya Imamura
Abstract: Even though a pump head part is finally fixed to a pump body with a fixing member, the pump head part is movable relative to the pump body perpendicular to the axial direction of a plunger at a stage before the pump head part is fixed with the fixing member. In this state, if a plunger driving part is moved to a predetermined location on the front end side of the pump body and the pump head part and the plunger driving part are fitted to each other, the pump head part is positioned where the center axis of the plunger and the center axis of the pump chamber are substantially aligned. By fixing the pump head part to the pump body with the fixing member at this location, it is possible to assemble a plunger pump with the center axis of the plunger and the center axis substantially aligned.
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公开(公告)号：US10648582B2
公开(公告)日：2020-05-12
申请号：US15737765
申请日：2015-09-15
Applicant: Shimadzu Corporation
Inventor： Shinya Imamura
Abstract: A check valve is provided with a rectilinear flow passage having a liquid inlet and a liquid outlet and allowing a liquid to flow therethrough in one direction, and a first valve body, a first valve seat, a second valve body, and a second valve seat are provided in the rectilinear flow passage. A first drive body is provided in the rectilinear flow passage at a position closer to the liquid inlet than the first valve body so as to be movable in one direction. The first drive body is driven in one direction by the drive mechanism. The drive mechanism is adapted to set the first drive body either to an open state in which the first drive body presses the first valve body toward the liquid outlet side to detach the first valve body from the first valve seat or to a closure state in which the first drive body does not press the first valve body toward the liquid outlet but allows the first valve body to be seated on the first valve seat. A second drive body is provided in the rectilinear flow passage at a position between the first valve body and the second valve body so as to be movable in one direction. When the first drive is set to the open state, the second drive body is pressed by the first valve body toward the liquid outlet to press the second valve body toward the liquid outlet, thereby detaching the second valve body from the second valve seat, and when the first drive body is set to the closure state, the second drive body is moved away from the second valve body to allow the second valve body to be seated on the second valve seat.
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公开(公告)号：US12105069B2
公开(公告)日：2024-10-01
申请号：US17438421
申请日：2019-10-16
Applicant: SHIMADZU CORPORATION
Inventor： Tomohiro Gomi , Daisuke Kitabayashi , Shinya Imamura , Keisuke Ogawa , Masataka Nikko , Masahide Gunji
CPC classification number: G01N30/8658 , G01N30/32 , G01N2030/027
Abstract: A liquid sending failure detector acquires periodically a liquid sending pressure of a liquid sending mechanism consecutively sends liquid using at least one plunger pump that sends liquid by reciprocally driving a plunger such that a fluctuation is read in one driving period of the liquid sending mechanism, and detect a liquid sending failure of the liquid sending mechanism using an acquired liquid sending pressure. The liquid sending failure detector executes a pulsation detection step of obtaining a fluctuation range of the liquid sending pressure in a certain driving period of the liquid sending mechanism and detecting pulsation on a condition that a count of consecutive periods in which the fluctuation range exceeds a predetermined reference value exceeds a predetermined reference count, and a liquid sending failure detection step of detecting a liquid sending failure of the liquid sending mechanism when the pulsation is detected in the pulsation detection step.
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公开(公告)号：US11921094B2
公开(公告)日：2024-03-05
申请号：US17438418
申请日：2019-03-13
Applicant: SHIMADZU CORPORATION
Inventor： Tomohiro Gomi , Daisuke Kitabayashi , Shinya Imamura , Keisuke Ogawa
CPC classification number: G01N30/8675 , G01N30/32 , G01N2030/027
Abstract: Liquid sent by a liquid sending pump flows through an analysis flow path. A sample is injected into the analysis flow path. A separation column is provided in the analysis flow path. A sample injected in the separation column is separated into components, and sample components obtained by separation are detected by a detector. The number of liquid sending pumps and a connection structure of the liquid sending pumps connected to the analysis flow path are specified by a system configuration specifier as a system configuration. A condition for detecting a liquid sending failure in a liquid sending pump that is preset for each type of system configuration is held by a condition holder. A condition corresponding to a system configuration is determined from conditions held by the condition holder. A liquid sending failure in a liquid sending pump is detected with use of the determined condition.
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Patent Agency Ranking
公开(公告)号：US09689384B2
公开(公告)日：2017-06-27
申请号：US14349945
申请日：2012-12-12
Applicant: SHIMADZU CORPORATION
Inventor： Shinya Imamura , Yoshiaki Maeda
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.
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公开(公告)号：US10995740B2
公开(公告)日：2021-05-04
申请号：US16334288
申请日：2017-06-30
Applicant: Shimadzu Corporation
Inventor： Jun Yanagibayashi , Shinya Imamura
Abstract: A switching valve is used in a binary pump. The switching valve is provided with a first liquid delivery port to which a first pump unit is connected, a second liquid delivery port to which a second pump unit is connected, and an output port leading to an output unit that outputs a liquid to be delivered. The switching valve is configured so as to be switched to any one of the following states: a first state in which the first liquid delivery port is connected to the output port and the second liquid delivery port is not connected to any port; a second state in which the second liquid delivery port is connected to the output port and the first liquid delivery port is not connected to any port; and a third state in which both the first liquid delivery port and the second liquid delivery port are connected to the output port.
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公开(公告)号：US20160369793A1
公开(公告)日：2016-12-22
申请号：US15180618
申请日：2016-06-13
Applicant: SHIMADZU CORPORATION
Inventor： Shinya Imamura
CPC classification number: F04B53/162 , F04B9/02 , F04B53/007 , F04B53/02 , F04B53/146 , F04B53/164
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.
Abstract translation: 柱塞密封件安装在泵头上，具有用于允许柱塞穿透的通孔，并且保持柱塞的外圆周表面并且还密封泵室的开口。备用环通过以下方式安装在泵头上： 介于柱塞密封件和泵体的末端表面之间。 支撑环具有通孔，用于允许柱塞的穿透，以不允许柱塞密封件进入到柱塞的外周表面的间隙的方式形成，并且还具有用于允许清洗液体的液体通道元件 清洁空间通过通孔到达柱塞密封。
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公开(公告)号：US12092099B2
公开(公告)日：2024-09-17
申请号：US16612380
申请日：2017-07-03
Applicant: SHIMADZU CORPORATION
Inventor： Keisuke Ogawa , Shinya Imamura
Abstract: A liquid feeding device includes a primary plunger pump; a secondary plunger pump connected downstream; a check valve provided between the primary plunger pump and the secondary plunger pump; a primary pressure sensor that detects a pressure in the pump chamber of the primary plunger pump; a liquid feeding control part configured to control operations of the primary plunger pump and the secondary plunger pump; and a liquid leakage detector configured to detect liquid leakage in the check valve based on a change in an output value of the primary pressure sensor during the waiting time. The liquid feeding control part is configured to control the operation of the primary plunger pump so that a waiting time, where the primary plunger pump stops without operating, is present while a discharge operation by the secondary plunger pump is performed after a suction by the primary plunger pump is completed.
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公开(公告)号：US11905946B2
公开(公告)日：2024-02-20
申请号：US16183806
申请日：2018-11-08
Applicant: Shimadzu Corporation
Inventor： Toshiki Sano , Shinya Imamura , Masataka Nikko
CPC classification number: F04B53/143 , F04B17/00 , F04B19/22 , F04B53/02 , F04B53/162
Abstract: A backup ring is for contacting with and supporting a plunger seal which is for sealing a pump chamber provided in a pump head of a plunger type liquid feeding pump. The backup ring includes a maximum outer diameter portion of a cylindrical shape and a smaller outer diameter portion. The maximum outer diameter portion includes a maximum outer diameter in a plunger seal supporting surface side that makes contact with a rear surface of the plunger seal. The smaller outer diameter portion includes a smaller outer diameter than the maximum outer diameter portion in at least one part of a portion other than the maximum outer diameter portion.
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