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公开(公告)号：US20220244222A1
公开(公告)日：2022-08-04
申请号：US17623771
申请日：2019-07-09
Applicant: SHIMADZU CORPORATION
Inventor： Jun YANAGIBAYASHI
IPC: G01N30/02
Abstract: A liquid delivery pump includes a primary plunger pump, a secondary plunger pump fluidly connected in series downstream of the primary plunger pump, and a pressure sensor that detects a system pressure. The liquid delivery pump further includes a liquid delivery control part configured to execute first constant pressure control in a first constant pressure control term and to execute second constant pressure control in a second constant pressure control term. The first constant pressure control term is a term, which is in a liquid delivery cycle consisting of the primary discharge process and the secondary discharge process, in which the primary discharge process is executed, the second constant pressure control term is a part of a term in which the secondary discharge process is executed, and the second constant pressure control term is including a term that is continuous after the first constant pressure control term.
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公开(公告)号：US20200278329A1
公开(公告)日：2020-09-03
申请号：US16648077
申请日：2017-10-23
Applicant: SHIMADZU CORPORATION
Inventor： Jun YANAGIBAYASHI , Shinya IMAMURA , Keisuke OGAWA , Masataka NIKKO , Shinichi FUJISAKI
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.
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公开(公告)号：US20190219194A1
公开(公告)日：2019-07-18
申请号：US16217523
申请日：2018-12-12
Applicant: SHIMADZU CORPORATION
Inventor： Wenjian LU , Shigeaki SHIBAMOTO , Jun YANAGIBAYASHI
IPC: F16K99/00
CPC classification number: F16K99/0015
Abstract: A first flow path is connected to an inlet for introducing gas into a microvalve. A second flow path is connected to an outlet for allowing gas to flow out of the microvalve. A third flow path is for introducing a pneumatic fluid into the microvalve. A negative pressure generation mechanism (a pump) is for generating a negative pressure on the second flow path to suck gas from the first flow path forward the second flow path via the microvalve. A pressure adjustment mechanism (a connection flow path and a valve) is for reducing a pressure difference between the second flow path and the third flow path to prevent the inlet and the outlet from being blocked by a diaphragm layer in response to the negative pressure generated on the second flow path side.
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公开(公告)号：US20220341513A1
公开(公告)日：2022-10-27
申请号：US17710318
申请日：2022-03-31
Applicant: SHIMADZU CORPORATION
Inventor： Jun YANAGIBAYASHI , Kenichi YASUNAGA
Abstract: A bioinert piping (1) that has a flow path (2) provided inside and a main body portion (10) between end portions (8, 8) includes a resin tube (4) that forms an inner wall of the flow path (2) over an entire length of the flow path (2), and a metal tube (6) that accommodates the resin tube (4) inside so as to cover the outer peripheral surface of the resin tube (4) over at least an entire length of the main body portion (10). The metal tube (6) is plastically deformed toward an inner side so that the outer peripheral surface of the resin tube (4) and an inner peripheral surface of the metal tube (6) are in liquid-tight contact with each other.
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公开(公告)号：US20210148868A1
公开(公告)日：2021-05-20
申请号：US16620489
申请日：2017-07-04
Applicant: SHIMADZU CORPORATION
Inventor： Jun YANAGIBAYASHI , Yusuke NAKATANI
IPC: G01N30/20 , F16K11/076
Abstract: An autosampler sets an injection valve to be in a sample filling state when a sample loop is filled with a sample, and, after completion of filling with the sample, switches the injection valve to an intermediate state and first connects only one end of the sample loop to a liquid delivery channel and an analysis channel. After the above, the injection valve is switched to the sample injection state and the sample loop is interposed between the liquid delivery channel and the analysis channel, so that the sample is injected into the analysis channel.
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Patent Agency Ranking
公开(公告)号：US20200182235A1
公开(公告)日：2020-06-11
申请号：US16629421
申请日：2017-07-28
Applicant: SHIMADZU CORPORATION
Inventor： Jun YANAGIBAYASHI , Keisuke OGAWA
Abstract: A liquid feeding device includes a discharge channel, a pump part, a feeding pressure sensor, a non-discharge pressure sensor, a pre-compression part, and a pre-compression speed determination part. The pump part has plunger pumps connected in series or parallel. At least one of the plunger pumps is a closed pump in which communication with the discharge channel is disconnected during a non-discharge time. The pre-compression part causes the closed pump that is after the suction process for sucking the liquid into a pump chamber is completed and during the non-discharge time to execute a pre-compression process to perform a discharge operation until a non-discharge pressure is substantially the same as a feeding pressure based on output of the feeding pressure sensor and output of the non-discharge pressure sensor. The pre-compression speed determination part determines a pre-compression speed of the closed pump in the pre-compression process.
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公开(公告)号：US20200072204A1
公开(公告)日：2020-03-05
申请号：US16611331
申请日：2017-05-10
Applicant: Shimadzu Corporation
Inventor： Jun YANAGIBAYASHI
Abstract: A liquid delivery device includes at least one liquid delivery pump that delivers liquid, at least one main channel communicating with an outlet of the liquid delivery pump, at least one branch channel branched from the main channel, and a switching valve that has, as a port for connecting channels, at least a port to which the main channel is connected, a port to which the branch channel is connected, at least one output port for outputting liquid delivered by the liquid delivery pump through the main channel, and at least one drain port leading to a drain, and is configured to be selectively switched to a first state, in which the main channel is connected to the output port while the branch channel is not connected to any channel, and a second state in which the branch channel is connected to the drain port while the main channel is not connected to any channel.
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公开(公告)号：US20190211813A1
公开(公告)日：2019-07-11
申请号：US16334288
申请日：2017-06-30
Applicant: Shimadzu Corporation
Inventor： Jun YANAGIBAYASHI , Shinya IMAMURA
CPC classification number: F04B13/02 , F04B23/06 , F04B53/10 , G01N30/26 , G01N30/32 , G01N30/34 , G01N30/38 , G01N30/86 , G01N2030/326 , G01N2030/328
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：US20220403959A1
公开(公告)日：2022-12-22
申请号：US17743310
申请日：2022-05-12
Applicant: SHIMADZU CORPORATION
Inventor： Jun YANAGIBAYASHI
Abstract: A fitting includes a screw portion that is rotatable around an axis extending in one direction, an operating portion that applies a torque around the axis to the screw portion, and a rotation auxiliary member that is configured to be engageable with the operating portion. A slot extending from a first end to a second end is provided in the rotation auxiliary member, and also a first projection that protrudes outward is provided on the rotation auxiliary member. A positional relationship of the first projection is set such that an engaging force between the rotation auxiliary member and the operating portion is increased due to a change in width of the slot in a case where a force is applied to the first projection in the first rotation direction with the rotation auxiliary member engaging with the operating portion.
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公开(公告)号：US20220403958A1
公开(公告)日：2022-12-22
申请号：US17739610
申请日：2022-05-09
Applicant: SHIMADZU CORPORATION
Inventor： Jun YANAGIBAYASHI
Abstract: A ratchet fitting includes a screw portion and an operating portion. One of the screw portion and the operating portion has an engaging member, and the other one of the screw portion and the operating portion has an elastic member and a holding member formed separately from the elastic member. The elastic member and the engaging member are fitted such that a rotational force is transmittable to each other due to engagement of the projection and the protrusion and engagement between the projection and the protrusion is releasable due to deformation of the elastic member. The elastic member has a first fitting portion, the holding member has a second fitting portion, and the holding member and the elastic member are fitted such that the first fitting portion and the second fitting portion are fitted to each other in a rotation direction.
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