Patents by Inventor Yuuhei UEYAMA

Yuuhei UEYAMA 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).

  • Patent number: 11145800
    Abstract: A multilayer pyroelectric element includes: a laminate body constituted by multiple pyroelectric body layers laminated in their thickness direction; internal electrode layers which are provided between the pyroelectric body layers, and one ends of which extend to the outer peripheries of the adjoining pyroelectric body layers; and external electrodes that connect the alternate internal electrode layers together at the one ends, wherein “x1>x3 AND x2>x3” are satisfied wherein x1 is a distance between a pair of first faces crossing at right angles with the laminating direction of the pyroelectric body layers, x2 is a distance between a pair of second faces crossing at right angles with the first faces and running parallel with the laminating direction of the pyroelectric body layers, and x3 a is a distance between a pair of third faces crossing at right angles with the first faces and also with the second faces.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: October 12, 2021
    Assignee: TAIYO YUDEN., CO. LTD.
    Inventors: Yuuhei Ueyama, Hiroyuki Shimizu, Yukihiro Konishi
  • Publication number: 20210119108
    Abstract: A piezoelectric ceramic containing no lead as a constituent element is provided. Coefficient of variation C.V. of grain size of grains contained in the piezoelectric ceramic is 35% or less, and an image quality (IQ) image obtained by analyzing a cross section of the piezoelectric ceramic by an electron backscatter diffraction (EBSD) method shows that at least one of the grains has a grain size of 3 ?m to 5 ?m and an area ratio of a domain in said at least one of the grains is 85% or more.
    Type: Application
    Filed: September 29, 2020
    Publication date: April 22, 2021
    Applicant: TAIYO YUDEN CO., LTD.
    Inventors: Tomohiro Harada, Yuuhei Ueyama
  • Publication number: 20200287124
    Abstract: A piezoelectric ceramic, which does not contain lead as a constituent element, is characterized in that: its primary component is a perovskite compound expressed by the composition formula (Bi0.5?x/2Na0.5?x/2Bax)(Ti1?yMny)O3 (where 0.01?x?0.25, 0.001?y?0.020); and the coefficient of variation (CV) in grain size among the grains contained therein is 35 percent or lower. The piezoelectric ceramic presents an improved dielectric loss tangent tan ?.
    Type: Application
    Filed: February 25, 2020
    Publication date: September 10, 2020
    Inventors: Yuuhei UEYAMA, Tomohiro HARADA, Hiroyuki SHIMIZU, Sumiaki KISHIMOTO, Yukihiro KONISHI
  • Publication number: 20200227616
    Abstract: A multilayer pyroelectric element includes: a laminate body constituted by multiple pyroelectric body layers laminated in their thickness direction; internal electrode layers which are provided between the pyroelectric body layers, and one ends of which extend to the outer peripheries of the adjoining pyroelectric body layers; and external electrodes that connect the alternate internal electrode layers together at the one ends, wherein “x1>x3 AND x2>x3” are satisfied wherein x1 is a distance between a pair of first faces crossing at right angles with the laminating direction of the pyroelectric body layers, x2 is a distance between a pair of second faces crossing at right angles with the first faces and running parallel with the laminating direction of the pyroelectric body layers, and x3a is a distance between a pair of third faces crossing at right angles with the first faces and also with the second faces.
    Type: Application
    Filed: July 24, 2018
    Publication date: July 16, 2020
    Inventors: Yuuhei UEYAMA, Hiroyuki SHIMIZU, Yukihiro KONISHI