Patents by Inventor Yoshihiro Yuu
Yoshihiro Yuu 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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ANALYSIS DEVICE, ANALYSIS METHOD, TRACE LIQUID COLLECTION DEVICE, AND TRACE LIQUID COLLECTION METHOD
Publication number: 20210349022Abstract: An analysis device 1 is provided with: a flow channel 12c; a suction mechanism connected to one end of the flow channel, the suction mechanism being configured to introduce a trace amount of a liquid sample L from the other end of the flow channel 12c into an inside of the flow channel 12c and hold the liquid sample L in a part of the flow channel 12c; and a measurement unit 40 configured such that a light irradiation unit 41 for irradiating the liquid sample L held by the part of the flow channel member 12 with light and a light reception unit for receiving the light from the liquid sample L are disposed around the liquid sample L. The measurement unit 40 is provided with an aperture member 46 to limit the light directed from the light irradiation unit 41 toward the liquid sample L, the aperture member 46 including an opening having an opening width L2 shorter than a liquid length L1 of the liquid sample L held by the flow channel 12c in the flow channel 12c.Type: ApplicationFiled: August 13, 2019Publication date: November 11, 2021Inventors: Yasuo TSUKUDA, Takahide HIRAMATSU, Toshiro KIMURA, Masayoshi ITO, Yoshihide HAYASHIZAKI, Yuji TANAKA, Yoshihiro YUU, Taku MATSUDERA, Atsushi SASAKI -
Patent number: 10286665Abstract: A liquid ejection head includes a first channel member and a plurality of pressurizing parts. The first channel member includes a plurality of ejection holes, a common channel, a damper chamber, and a damper. The first channel member is configured by a plurality of flat plates including a first plate with the plurality of ejection holes and a second plate adjacent to this. The second plate includes a first part sandwiched between the damper chamber and the first plate. A covering layer is unevenly provided on the first surface of the first part.Type: GrantFiled: July 28, 2016Date of Patent: May 14, 2019Assignee: Kyocera CorporationInventors: Kousei Horiuchi, Kouichi Maruta, Kazumasa Furuhashi, Yoshihiro Yuu, Ayumu Matsumoto, Hiroshi Tamura, Takayuki Yamamoto
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Publication number: 20190001673Abstract: A liquid ejection head includes a first channel member and a plurality of pressurizing parts. The first channel member includes a plurality of ejection holes, a common channel, a damper chamber, and a damper. The first channel member is configured by a plurality of flat plates including a first plate with the plurality of ejection holes and a second plate adjacent to this. The second plate includes a first part sandwiched between the damper chamber and the first plate. A covering layer is unevenly provided on the first surface of the first part.Type: ApplicationFiled: July 28, 2016Publication date: January 3, 2019Applicant: KYOCERA CorporationInventors: Kousei HORIUCHI, Kouichi MARUTA, Kazumasa FURUHASHI, Yoshihiro YUU, Ayumu MATSUMOTO, Hiroshi TAMURA, Takayuki YAMAMOTO
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Patent number: 9969160Abstract: The present invention aims at providing a piezoelectric substrate with high joining strength between an electrode of the piezoelectric substrate. The piezoelectric substrate of the present invention is a flat plate-shaped piezoelectric substrate including a piezoelectric ceramic layer, a plurality of first electrodes and a second electrode disposed on one main surface of the piezoelectric ceramic layer, a third electrode disposed on the other main surface of the piezoelectric ceramic layer so as to oppose to the first electrodes, and a through-conductor electrically connecting the second electrode and the third electrode. The second electrode includes a connection portion connected to the through-conductor, and a small-width portion having a smaller width than the connection portion when the piezoelectric substrate is viewed from above. The second electrode and the outside are electrically connected to each other at the small-width portion.Type: GrantFiled: December 25, 2014Date of Patent: May 15, 2018Assignee: KYOCERA CORPORATIONInventors: Yoshihiro Yuu, Kouji Eitoku, Kosei Horiuchi
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Publication number: 20160332446Abstract: The present invention aims at providing a piezoelectric substrate with high joining strength between an electrode of the piezoelectric substrate. The piezoelectric substrate of the present invention is a flat plate-shaped piezoelectric substrate including a piezoelectric ceramic layer, a plurality of first electrodes and a second electrode disposed on one main surface of the piezoelectric ceramic layer, a third electrode disposed on the other main surface of the piezoelectric ceramic layer so as to oppose to the first electrodes, and a through-conductor electrically connecting the second electrode and the third electrode. The second electrode includes a connection portion connected to the through-conductor, and a small-width portion having a smaller width than the connection portion when the piezoelectric substrate is viewed from above. The second electrode and the outside are electrically connected to each other at the small-width portion.Type: ApplicationFiled: December 25, 2014Publication date: November 17, 2016Applicant: KYOCERA CorporationInventors: Yoshihiro YUU, Kouji EITOKU, Kosei HORIUCHI
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Patent number: 8100515Abstract: A multilayer piezoelectric actuator and a liquid discharge head are provided which are equipped with dense piezoelectric ceramics having improved insulation performance. The multilayer piezoelectric actuator comprises a multilayered body comprising a plurality of piezoelectric ceramic layers containing a PZT phase as a main crystal phase; and an electrode layer containing Ag, which is disposed at least one of on the surface and in the interior of the multilayered body. A lattice constant c of c-axis of the PZT phase is 0.4085 nm to 0.4100 nm, and a ratio of the lattice constant c of the c-axis of the PZT phase and a lattice constant a of a-axis, namely, the ratio c/a, is 1.011 or more. A second phase containing Ag different from the PZT phase is not substantially contained in the piezoelectric ceramic layer. A Zn2SiO4 phase is contained at grain boundaries of the PZT phase, and a Pb2SiO4 phase is not substantially contained at the grain boundaries of the PZT phase.Type: GrantFiled: March 18, 2008Date of Patent: January 24, 2012Assignee: Kyocera CorporationInventors: Shuzo Iwashita, Yoshihiro Yuu
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Publication number: 20100225710Abstract: A multilayer piezoelectric actuator and a liquid discharge head are provided which are equipped with dense piezoelectric ceramics having improved insulation performance. The multilayer piezoelectric actuator comprises a multilayered body comprising a plurality of piezoelectric ceramic layers containing a PZT phase as a main crystal phase; and an electrode layer containing Ag, which is disposed at least one of on the surface and in the interior of the multilayered body. A lattice constant c of c-axis of the PZT phase is 0.4085 nm to 0.4100 nm, and a ratio of the lattice constant c of the c-axis of the PZT phase and a lattice constant a of a-axis, namely, the ratio c/a, is 1.011 or more. A second phase containing Ag different from the PZT phase is not substantially contained in the piezoelectric ceramic layer. A Zn2SiO4 phase is contained at grain boundaries of the PZT phase, and a Pb2SiO4 phase is not substantially contained at the grain boundaries of the PZT phase.Type: ApplicationFiled: March 18, 2008Publication date: September 9, 2010Applicant: KYOCERA CORPORATIONInventors: Shuzo Iwashita, Yoshihiro Yuu
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Publication number: 20060214540Abstract: A piezoelectric actuator is formed of a ceramic diaphragm made of a first piezoelectric ceramic and a number of displacement elements which are provided on the surface of the ceramic diaphragm, wherein each displacement element is formed of a piezoelectric layer made of a second piezoelectric ceramic as well as a common electrode and a drive electrode which sandwich this piezoelectric layer, and the above described first piezoelectric ceramic and the above described second piezoelectric ceramic have substantially the same main components and different piezoelectric properties, and thereby, a piezoelectric actuator can have excellent durability when driven.Type: ApplicationFiled: March 24, 2006Publication date: September 28, 2006Inventor: Yoshihiro Yuu
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Patent number: 7044587Abstract: An actuator 1 in which a displacement element 7 has a piezoelectric ceramic layer 4 and a pair of electrodes 5, 6 interposing therebetween the piezoelectric ceramic layer 4. The entire thickness of the actuator 1 is 100 ?m or less. The piezoelectric ceramic layer 4 and the substrate 2 have as their principal component a perovskite crystal containing at least Pb; Zr and Ti, and, the maximum difference in a composition ratio Pb/(Ti+Zr) between the surface of the piezoelectric ceramic layer 4 and the inside of the substrate 2 is 0.02 or less. This reduces characteristic variation.Type: GrantFiled: October 17, 2003Date of Patent: May 16, 2006Assignee: Kyocera CorporationInventors: Yoshihiro Yuu, Daisuke Takahashi, Makoto Higashibeppu, Chitoshi Ueki, Hiroshi Aida
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Patent number: 6891316Abstract: The laminated piezoelectric element having a thickness of 100 ?m or less of the present invention comprises a laminate which comprises a plurality of piezoelectric ceramic layers 1, and electrodes 2,3 provided the surface and the inside of the laminate, wherein the electrode 2 comprises a silver-palladium alloy containing 71 to 99.9% by volume of silver and 0.1 to 29% by volume of palladium.Type: GrantFiled: August 26, 2003Date of Patent: May 10, 2005Assignee: Kyocera CorporationInventors: Yoshihiro Yuu, Shuzo Iwashita, Daisuke Takahashi
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Publication number: 20040113995Abstract: An actuator 1 in which a displacement element 7 has a piezoelectric ceramic layer 4 and a pair of electrodes 5, 6 interposing therebetween the piezoelectric ceramic layer 4. The entire thickness of the actuator 1 is 100 &mgr;m or less. The piezoelectric ceramic layer 4 and the substrate 2 have as their principal component a perovskite crystal containing at least Pb; Zr and Ti, and, the maximum difference in a composition ratio Pb/(Ti+Zr) between the surface of the piezoelectric ceramic layer 4 and the inside of the substrate 2 is 0.02 or less. This reduces characteristic variation.Type: ApplicationFiled: October 17, 2003Publication date: June 17, 2004Applicant: KYOCERA CORPORATIONInventors: Yoshihiro Yuu, Daisuke Takahashi, Makoto Higashibeppu, Chitoshi Ueki, Hiroshi Aida
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Publication number: 20040104644Abstract: The laminated piezoelectric element having a thickness of 100 &mgr;m or less of the present invention comprises a laminate which comprises a plurality of piezoelectric ceramic layers 1, and electrodes 2,3 provided the surface and the inside of the laminate, wherein the electrode 2 comprises a silver-palladium alloy containing 71 to 99.9% by volume of silver and 0.1 to 29% by volume of palladium.Type: ApplicationFiled: August 26, 2003Publication date: June 3, 2004Applicant: Kyocera CorporationInventors: Yoshihiro Yuu, Shuzo Iwashita, Daisuke Takahashi