Hitachi, Ltd.

Hitachi High-tech Corporation

Hitachi-high-technologies Corporation

Hisao Inami

Yasuhiko Sasaki

Ryo Miyake

Yoshihiro Nagaoka

Daisuke Akieda

Nobuhiro Tsukada

Ayano Otsubo

Kenichiro Nishiki

Motohiro Yamazaki

Makoto Hirose

Toshiaki Rokunohe

Hajime Katou

Masaru Tatemi

Mitsuhiko Ueda

Hiroyuki Nakamichi

Shoji Tomida

A flowpath switch valve is configured for extended service life by spreading the region, of the sliding surfaces of a stator and a rotor, that is subject to wear over the entirety of the sliding surfaces. The stator has fixed stator flowpaths, and the rotor has rotor flowpaths. A flowpath switch valve, depending on the rotor rotation state, realizes connection patterns that include: a first connection pattern wherein a rotor flowpathconnects a fixed stator flowpathand a fixed stator flowpath; a second connection pattern wherein the rotor flowpathconnects the fixed stator flowpathand a fixed stator flowpath; a third connection pattern wherein a rotor flowpathconnects the fixed stator flowpathand the fixed stator flowpath; and a fourth connection pattern wherein the rotor flowpathconnects the fixed stator flowpathand the fixed stator flowpath

Flow passage switching valve, flow passage switching valve system, and liquid chromatograph

A liquid chromatograph has a long-life flow passage switching valve with reduced abrasion caused by sliding of flow passage end portions of a stator and flow passage end portions of a rotor seal. The flow passage switching valve includes: a stator; and a rotor seal connected with a rotor configured to rotate and slide on a circumference with respect to the stator. The stator has stator flow passages that open to the rotor seal. The rotor seal has a rotor seal flow passage for coupling two or more of the stator flow passages. A flow passage end portion that is positioned at a tip end in a sliding direction of the rotor seal flow passage is positioned in a direction opposite to the sliding direction of the stator flow passage end portion to be connected to the rotor seal flow passage, at least at the start of sliding.

Flow passage switching valve and liquid chromatograph having the same

A gas leak detection device includes a learning section, which has a correlation between a gas temperature inside gas pressure containers and a surface temperature of the gas pressure containers in a learning period corresponding to a current value flowing in the conductor, to make database, and a diagnosis section, which extracts a gas temperature corresponding to the measured current value and the surface temperature from the learning section in a diagnosis period, corrects a gas pressure value corresponding to an arbitrary surface temperature to a gas pressure value of a reference temperature using the extracted gas temperature, and detects a leak of the insulating gas based on the corrected gas pressure value.

Gas leak detection device and gas leak detection method

In some examples, a liquid feeding device includes a main flow passage in which a fluid may be fed between an upstream side and a downstream side. A first flow passage may branch from the main flow passage, and may include a narrow flow passage at a terminal end portion, having a smaller cross-sectional area than the first flow passage. A liquid feeding mechanism may feed the fluid to the main flow passage and the first flow passage. The narrow flow passage may suppress the fluid from leaking from first flow passage. Thus, the liquid feeding device may quantitatively determine a first volume of the fluid by filling the first flow passage with the fluid, and subsequently feeding the quantitatively determined fluid back to the main flow passage.

Liquid feeder and chemical analyzer including same

An analytical chip and analyzer are disclosed. The analytical chip comprises a substrate and reaction cells that are formed in the substrate for receiving a sample collected from a living body. A reagent storage portion is used to store reagents to be supplied to the reaction cells. Flow paths are provided to connect the reaction cells to the reagent storage portions, thereby allowing the reagents stored in the reagent storage portions to flow into the reaction cells.

Analytical chip and analyzer

There is provided a group of testing apparatuses that realizes high-level testing and high quality medical treatment by conducting tests using apparatuses and facilities that are located in a distributed condition. A distributed testing apparatus is configured to be connectable to a network system to which a host testing apparatus is connected, wherein the distributed testing apparatus has a testing part that assays genetic information of a specimen, a transmission part that transmits test results information of the testing part and a specimen ID corresponding to the specimen to the host testing apparatus through the network, a receiver part that receives through the network assessment information from the host testing apparatus that corresponds to the transmitted test results information, and an output part that outputs the received information.

Distributed testing apparatus and host testing apparatus

Growing community of inventors

Tokyo, Japan

Hisao Inami