Patents by Inventor Kotaro Yamashita
Kotaro Yamashita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20210172477Abstract: A cage includes: a first holding portion in which a plurality of radial rollers is held; a second holding portion in which a plurality of thrust rollers is held; and a connecting portion via which the first holding portion is connected to the second holding portion. The first holding portion, the second holding portion, and the connecting portion are molded integrally by a resin member.Type: ApplicationFiled: December 2, 2020Publication date: June 10, 2021Applicant: JTEKT CORPORATIONInventor: Kotaro YAMASHITA
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Publication number: 20210172476Abstract: A radial roller bearing cage includes a pair of annular bodies; and a plurality of bars by which the annular bodies are axially connected to each other. The annular bodies and the bars are integrally formed by resin molding. A plurality of pockets separated from each other by the bars is provided between the annular bodies. A projection projecting radially inwardly is provided in at least one of parts of at least one of the annular bodies, the parts axially facing the pockets, respectively.Type: ApplicationFiled: November 30, 2020Publication date: June 10, 2021Applicant: JTEKT CORPORATIONInventor: Kotaro YAMASHITA
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Publication number: 20200271210Abstract: A planet gear support shaft includes a cylindrical body that is open at both ends in a central axis direction. The cylindrical body has an inlet port through which lubricating oil is introduced into a hollow portion of the cylindrical body, and a discharge port through which the lubricating oil introduced into the hollow portion is discharged, the inlet port and the discharge port being open to an inner peripheral surface of the hollow portion at different positions in the central axis direction. An oil guide groove is provided between a first opening of the inlet port and a second opening of the discharge port in the inner peripheral surface. The oil guide groove is configured to guide the lubricating oil between the first opening and the second opening.Type: ApplicationFiled: February 10, 2020Publication date: August 27, 2020Applicant: JTEKT CORPORATIONInventors: Kotaro YAMASHITA, Kazuyuki KOTANI, Shoshi SUEMITSU, Tomohiro HIROKAWA, Makoto HAMANO, Mitsushiko KATO
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Publication number: 20200232552Abstract: A planetary gear support shaft is provided in a shaft hole of a planetary gear to support the planetary gear. The planetary gear is disposed between an internal gear and an external gear supported coaxially so as to be rotatable relative to each other. The planetary gear support shaft includes a body made of a tubular steel pipe with two open ends, and a pair of lid bodies that block opening portions at the two ends of the body. The body has an in-flow hole that allows lubricating oil to flow into a hollow portion between the pair of lid bodies and an out-flow hole through which the lubricating oil is supplied from the hollow portion into the shaft hole.Type: ApplicationFiled: January 15, 2020Publication date: July 23, 2020Applicant: JTEKT CORPORATIONInventors: Kotaro YAMASHITA, Kazuyuki KOTANI, Tomohiro HIROKAWA, Shoshi SUEMITSU, Makoto HAMANO
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Patent number: 10670075Abstract: A thrust roller bearing includes rollers, a cage that holds the rollers in a manner that allows the rollers to roll, and a washer including a raceway surface on which the rollers roll. The washer includes a raceway portion that has the raceway surface and is disposed on a first axial side of the cage, and hook portions that extend toward a second axial side. Each of the hook portions includes a first projecting portion that extends toward the second axial side from the raceway portion, a second projecting portion that extends radially toward the rollers and toward the second axial side from an end portion of the first projecting portion on the second axial side, and a third projecting portion that further projects radially toward the rollers from an end portion of the second projecting portion on a side opposite to the first projecting portion.Type: GrantFiled: May 9, 2019Date of Patent: June 2, 2020Assignee: JTEKT CORPORATIONInventors: Kotaro Yamashita, Yoshihito Nakashima
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Publication number: 20200040945Abstract: A radial roller bearing cage made of metal includes annular rim portions; and a retaining portion including cage bars. Each of the cage bars includes a body portion connecting the rim portions to each other, and projected portions. On an outer peripheral side of the retaining portion, at least a portion of an outer surface of the body portion is a curved surface having the same diameter as a diameter of an outer peripheral surface of each of the rim portions. In an outer surface of each of the projected portions on the outer peripheral side of the retaining portion, at least a portion on a distal end side in a projected direction is located radially inward of the outer peripheral surface of each of the rim portions.Type: ApplicationFiled: July 8, 2019Publication date: February 6, 2020Applicant: JTEKT CORPORATIONInventor: Kotaro YAMASHITA
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Publication number: 20190345981Abstract: A thrust roller bearing includes rollers, a cage that holds the rollers in a manner that allows the rollers to roll, and a washer including a raceway surface on which the rollers roll. The washer includes a raceway portion that has the raceway surface and is disposed on a first axial side of the cage, and hook portions that extend toward a second axial side. Each of the hook portions includes a first projecting portion that extends toward the second axial side from the raceway portion, a second projecting portion that extends radially toward the rollers and toward the second axial side from an end portion of the first projecting portion on the second axial side, and a third projecting portion that further projects radially toward the rollers from an end portion of the second projecting portion on a side opposite to the first projecting portion.Type: ApplicationFiled: May 9, 2019Publication date: November 14, 2019Applicant: JTEKT CORPORATIONInventors: Kotaro YAMASHITA, Yoshihito NAKASHIMA
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Patent number: 10378584Abstract: A cage for a radial roller bearing includes an inner cage member made of a continuous annular steel material and having a plurality of through holes, in which a plurality of rollers is housed in a corresponding one of the through holes, and an outer cage member made from resin and having a plurality of retaining holes, in which the plurality of rollers is retained such that the rollers are rollable, provided in correspondence with the through holes. The outer cage member is fixed to an outer side of the inner cage member by an axial projection-recess fitting structure.Type: GrantFiled: November 16, 2018Date of Patent: August 13, 2019Assignee: JTEKT CORPORATIONInventor: Kotaro Yamashita
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Publication number: 20190162234Abstract: A cage for a radial roller bearing includes an inner cage member made of a continuous annular steel material and having a plurality of through holes, in which a plurality of rollers is housed in a corresponding one of the through holes, and an outer cage member made from resin and having a plurality of retaining holes, in which the plurality of rollers is retained such that the rollers are rollable, provided in correspondence with the through holes. The outer cage member is fixed to an outer side of the inner cage member by an axial projection-recess fitting structure.Type: ApplicationFiled: November 16, 2018Publication date: May 30, 2019Applicant: JTEKT CORPORATIONInventor: Kotaro YAMASHITA
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Patent number: 9400247Abstract: An automatic analyzer has a multi-wavelength light source that irradiates a reaction cuvette containing a liquid mixture of a sample to be analyzed and a reagent. A transmitted-light quantity detector detects the amount of light transmitted through the reaction cuvette and internal contents of the reaction cuvette. A single-wavelength light source irradiates the reaction cuvette with single-wavelength light; and a transmitted-light quantity detector detects the amount of single-wavelength light scattered from the reaction cuvette.Type: GrantFiled: February 12, 2013Date of Patent: July 26, 2016Assignee: Hitachi High-Technologies CorporationInventors: Kotaro Yamashita, Masahiko Iijima
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Publication number: 20150033831Abstract: An automatic analyzer has a multi-wavelength light source that irradiates a reaction cuvette containing a liquid mixture of a sample to be analyzed and a reagent. A transmitted-light quantity detector detects the amount of light transmitted through the reaction cuvette and internal contents of the reaction cuvette. A single-wavelength light source irradiates the reaction cuvette with single-wavelength light; and a transmitted-light quantity detector detects the amount of single-wavelength light scattered from the reaction cuvette.Type: ApplicationFiled: February 12, 2013Publication date: February 5, 2015Inventors: Kotaro Yamashita, Masahiko Iijima
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Patent number: 8394247Abstract: The present invention aims to simplify the structure and a fabrication method of an ion-selective electrode in an ion concentration measuring device that measures an anion, particularly a chloride ion, in a biological component. To this end, in a potential difference measuring unit, a quaternary ammonium salt derivative serving as a ligand for an anion is immobilized to the surface of a gold electrode by using as a linker an insulative molecule forming a self-assembled monolayer. The potential difference measuring unit measures an electromotive force generated with anion binding, as an interface potential change on the surface of the gold electrode. In order to reduce the influence of adsorption of impurities on the electrode surface, a high-molecular weight polymer is physically adsorbed on the gold electrode and thus used when a biological component is measured.Type: GrantFiled: August 19, 2008Date of Patent: March 12, 2013Assignee: Hitachi High-Technologies CorporationInventors: Masao Kamahori, Yu Ishige, Kotaro Yamashita, Yasuhisa Shibata, Masafumi Miyake, Kuniaki Nagamine
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Patent number: 8323468Abstract: A crown ether derivative that acts as cation capturing ligand and alkanethiol having a longer carbon chain than a linker are immobilized, coexisting together, on the surface of a gold electrode, by using as the linker an insulating molecule (e.g., alkanethiol) that forms self-assembled monolayers. Electromotive force produced in association with cation coordination is measured by a potentiometer through a change in interfacial potential on the surface of the gold electrode. Further, an insulated gate field effect transistor formed on the same substrate as the gold electrode is used as the potentiometer. Furthermore, a straight-chain polymer physically adsorbed on the gold electrode is used in order to reduce the influence of the adsorption of impurities on the surface of the electrode during biological sample measurement.Type: GrantFiled: April 21, 2008Date of Patent: December 4, 2012Assignee: Hitachi-High Technologies CorporationInventors: Masao Kamahori, Yu Ishige, Kotaro Yamashita, Yasuhisa Shibata, Masafumi Miyake
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Publication number: 20120174882Abstract: Among a plurality of bearings that rotatably support a camshaft (1), the bearing closest to a pulley (P) is a rolling bearing (4), and the other bearings are plain bearings (3). The rolling bearing (4) is formed of a roller bearing portion (5) that has a first outer ring raceway surface (51) and a plurality of cylindrical rollers (53) that roll on the first outer ring raceway surface (51) and a ball bearing portion (6) that is arranged next to the roller bearing portion (5) in an axial direction and that has a second outer ring raceway surface (61) and a plurality of balls (63) that roll on the second outer ring raceway surface (61). The first outer ring raceway surface (51) and the second outer ring raceway surface (61) are formed on the inner peripheral surface (7a) of a single outer ring (7).Type: ApplicationFiled: October 19, 2010Publication date: July 12, 2012Applicant: JTEKT CORPORATIONInventors: Kazuki Hamada, Hiroshi Ueno, Isao Usuki, Hironori Hiraoka, Kotaro Yamashita, Hiroshi Satou, Takaaki Ikeda, Ryo Oonishi
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Publication number: 20120073533Abstract: A camshaft device (10) includes a camshaft (11) onto which a cam (18) is fitted; a plurality of rolling bearings (12) that are fitted at intervals in an axial direction onto this camshaft (11); and a support frame (13) that is mounted on a cylinder head (15) of an engine, and that has a plurality of bearing holes (25) which are formed on the same axis and into which the rolling bearings (12) fitted, and that rotatably supports the camshaft (11) via the rolling bearings (12) that are fitted into the bearing holes (25). The support frame (13) is formed by connecting a plurality of split bodies (27), (28) together, and the plurality of split bodies (27), (28) includes a first split body (27) on which a plurality of first concave portions (29) that form half of the bearing holes (25) is integrally formed, and a second split body (28) on which a plurality of second concave portions (30) that form the other half of the bearing holes (25) is integrally formed.Type: ApplicationFiled: May 19, 2010Publication date: March 29, 2012Applicant: JTEKT CORPORATIONInventors: Kazuki Hamada, Hiroshi Ueno, Isao Usuki, Kunio Yanai, Hironori Hiraoka, Kotaro Yamashita, Hiroshi Satou, Takaaki Ikeda, Ryo Oonishi
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Apparatus for measuring high density lipoproteins and method of separating high density lipoproteins
Patent number: 7838631Abstract: The present invention provides a method of separating lipoproteins other than high density lipoproteins from a biological fluid. The method can quickly measure HDL cholesterol with a simple configuration and without the need of providing additional complicated devices. In this method, high density lipoproteins not generating any precipitate are fractionated from low density lipoproteins, very-low density lipoproteins, and chylomicrons generating precipitates. Then the precipitates are removed not by centrifugal separation based on the conventional technology, but by filtration using a filter to separate high density lipoproteins in blood serum. A hydrophilic cellulose-mixed ester is preferable as a material for the filter, and the pore diameter is 0.8 ?m or below. When the filtering method is employed, it is possible to eliminate the complicated operations required in the conventional centrifugal separation, and to shorten the time it takes for separation of the high density lipoproteins.Type: GrantFiled: June 2, 2008Date of Patent: November 23, 2010Assignee: Hitachi High-Technologies CorporationInventors: Kotaro Yamashita, Masafumi Miyake -
Publication number: 20090071826Abstract: The present invention aims to simplify the structure and a fabrication method of an ion-selective electrode in an ion concentration measuring device that measures an anion, particularly a chloride ion, in a biological component. To this end, in a potential difference measuring unit, a quaternary ammonium salt derivative serving as a ligand for an anion is immobilized to the surface of a gold electrode by using as a linker an insulative molecule forming a self-assembled monolayer. The potential difference measuring unit measures an electromotive force generated with anion binding, as an interface potential change on the surface of the gold electrode. In order to reduce the influence of adsorption of impurities on the electrode surface, a high-molecular weight polymer is physically adsorbed on the gold electrode and thus used when a biological component is measured.Type: ApplicationFiled: August 19, 2008Publication date: March 19, 2009Inventors: Masao Kamahori, Yu Ishige, Kotaro Yamashita, Yasuhisa Shibata, Masafumi Miyake, Kuniaki Nagamine
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APPARATUS FOR MEASURING HIGH DENSITY LIPOPROTEINS AND METHOD OF SEPARATING HIGH DENSITY LIPOPROTEINS
Publication number: 20080312414Abstract: The present invention provides a method of separating lipoproteins other than high density lipoproteins from a biological fluid. The method can quickly measure HDL cholesterol with a simple configuration and without the need of providing additional complicated devices. In this method, high density lipoproteins not generating any precipitate are fractionated from low density lipoproteins, very-low density lipoproteins, and chylomicrons generating precipitates. Then the precipitates are removed not by centrifugal separation based on the conventional technology, but by filtration using a filter to separate high density lipoproteins in blood serum. A hydrophilic cellulose-mixed ester is preferable as a material for the filter, and the pore diameter is 0.8 ?m or below. When the filtering method is employed, it is possible to eliminate the complicated operations required in the conventional centrifugal separation, and to shorten the time it takes for separation of the high density lipoproteins.Type: ApplicationFiled: June 2, 2008Publication date: December 18, 2008Inventors: Kotaro YAMASHITA, Masafumi Miyake -
Publication number: 20080264790Abstract: A crown ether derivative that acts as cation capturing ligand and alkanethiol having a longer carbon chain than a linker are immobilized, coexisting together, on the surface of a gold electrode, by using as the linker an insulating molecule (e.g., alkanethiol) that forms self-assembled monolayers. Electromotive force produced in association with cation coordination is measured by a potentiometer through a change in interfacial potential on the surface of the gold electrode. Further, an insulated gate field effect transistor formed on the same substrate as the gold electrode is used as the potentiometer. Furthermore, a straight-chain polymer physically adsorbed on the gold electrode is used in order to reduce the influence of the adsorption of impurities on the surface of the electrode during biological sample measurement.Type: ApplicationFiled: April 21, 2008Publication date: October 30, 2008Inventors: Masao Kamahori, Yu Ishige, Kotaro Yamashita, Yasuhisa Shibata, Masafumi Miyake
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Patent number: 7189315Abstract: An ion sensor has a flow path through which a sample flows. An ion-exchange membrane is in contact with the sample in the sample flow path. An internal solution is provided on one side of the ion-exchange membrane. An internal electrode is provided so as to come in contact with the internal solution. The surface of the ion-exchange membrane that does not come in contact with the sample is coated with a two-liquid-mixed epoxy resin.Type: GrantFiled: September 19, 2002Date of Patent: March 13, 2007Assignee: Hitachi High-Technologies CorporationInventors: Kotaro Yamashita, Koichi Tayama, Noriko Yoshioka, Yasuhisa Shibata